Appliance Board A Scrap Classification Wiki
Part 1 – Introduction, Classification Philosophy, Appliance Electronics, Technical Characteristics, and Recoverable Materials
Introduction to Appliance Board A
Appliance A Grade board scrap includes medium-density control boards removed from larger household appliances, office equipment, vending systems, and light commercial machines. Typical boards combine a digital control section with relays, transformers, power-management components, sensor connectors, and multiple wire-harness interfaces. They are more complex than simple Appliance B timer, LED-driver, or single-function power boards, but they do not have the processor density or premium connectors found on computer, telecom, or industrial A+ boards.
Use the checklist and comparison table below to confirm component density, board completeness, equipment source, and physical condition before sorting material for delivery. Final classification is based on physical inspection under the current Ohata Board Classification.
Modern household appliances rely heavily on electronic control systems to improve efficiency, safety, automation, and energy management. Washing machines, refrigerators, microwave ovens, air conditioners, printers, photocopiers, vending machines, coffee machines, and HVAC systems all incorporate sophisticated electronic control boards that monitor sensors, regulate power, communicate with peripheral devices, and manage user interfaces.
Typical Appliance Board A products include washing machine control boards, microwave oven controllers, air conditioner PCBs, refrigerator electronic modules, dishwasher control boards, printer formatter boards, copier controllers, vending machine electronics, commercial coffee machine boards, and various light industrial control modules.
Compared with premium computer motherboards, Appliance Board A products generally feature moderate integrated circuit density, mixed analog and digital circuitry, relay control systems, switching power supplies, and standard multilayer or double-sided PCB construction. While their precious metal content is modest, the enormous quantity of appliance electronics generated worldwide makes them an essential category within the electronic recycling industry.
The Ohata Board Scrap Classification System evaluates Appliance Board A using objective engineering characteristics, including component density, PCB construction, connector quality, power electronics, board completeness, and recoverable material content. This standardized approach supports consistent grading, transparent purchasing, and efficient downstream refining.
Why Appliance Board A Exists
Electronic appliances differ significantly from computers, servers, and telecommunications equipment. Their circuit boards are engineered primarily to control motors, heating elements, compressors, pumps, sensors, displays, and user interfaces rather than perform complex computing tasks.
As a result, appliance control boards contain fewer advanced processors and less gold plating than computer hardware, yet they often include robust power electronics, thick copper traces, transformers, relays, and durable PCB construction designed for long service lives.
The Appliance Board A category was created to recognize these characteristics. Without a dedicated classification, appliance boards could easily become mixed with computer motherboards or lower-grade appliance electronics, reducing pricing accuracy and refining efficiency.
By separating Appliance Board A into its own category, the Ohata Classification System provides buyers and suppliers with a standardized method for identifying appliance electronics that contain meaningful recoverable materials while maintaining clear distinctions from computer and telecommunications boards.
The Ohata Classification Philosophy
The Ohata Board Scrap Classification System is based on objective physical evaluation rather than equipment brand or original selling price.
For Appliance Board A, classification considers multiple engineering characteristics simultaneously, including:
Integrated circuit density
Power management circuitry
PCB construction quality
Relay configuration
Transformer sections
Connector quality
Board completeness
Recoverable copper content
Intended equipment application
No single feature determines classification. Instead, buyers evaluate the complete electronic assembly to estimate its recoverable material value and technical complexity.
This methodology ensures that appliance boards with similar construction receive consistent classifications regardless of manufacturer or fluctuations in commodity prices. The result is a practical grading system that supports efficient sorting throughout the global electronic recycling industry.
Appliance Electronics
Modern appliances contain increasingly sophisticated electronics. Microprocessors, digital displays, inverter technology, variable-speed motors, and intelligent energy management systems have transformed household appliances into advanced electronic products.
Common applications include:
Laundry equipment
Kitchen appliances
Climate control systems
Beverage dispensers
Commercial food equipment
Office machines
Building automation devices
Light industrial machinery
These products commonly integrate sensor processing, motor control, communication interfaces, and switching power supplies into compact electronic assemblies.
Although their semiconductor density is generally lower than computer motherboards, appliance electronics often contain larger power-handling components and reinforced PCB sections capable of supporting higher electrical currents.
Typical Appliance Board A Types
Several board categories are commonly assigned to Appliance Board A.
Washing machine control boards regulate wash cycles, water levels, motor speed, drainage systems, and user interfaces. They typically contain microcontrollers, relays, sensor interfaces, and power regulation circuits.
Microwave oven controller boards manage cooking programs, keypad input, display functions, safety interlocks, and timing circuits while controlling high-voltage switching components.
Air conditioner control boards coordinate compressor operation, fan motors, temperature sensors, inverter systems, and communication between indoor and outdoor units.
Refrigerator electronic boards monitor temperature, defrost cycles, compressors, ice makers, and energy management systems.
Printer and copier controller boards process print jobs, manage motors, communicate with computers, and regulate imaging systems through multiple controller ICs and memory devices.
Vending machine controllers supervise payment systems, inventory management, dispensing mechanisms, and communication networks, making them among the more sophisticated appliance electronics.
Technical Characteristics
Appliance Board A products share several engineering characteristics that distinguish them from computer motherboards.
Moderate Integrated Circuit Density
Most Appliance Board A products contain a balanced combination of digital controllers and analog power electronics.
Typical semiconductor devices include:
Microcontrollers
EEPROM
Flash memory
Display controllers
Power management ICs
Motor driver ICs
Sensor interface chips
Communication controllers
Compared with computer boards, integrated circuits are generally concentrated around control functions rather than high-performance computing.
Mixed Analog and Digital Circuits
Appliance electronics combine digital logic with analog power management to control motors, compressors, heaters, pumps, and sensors.
Common analog sections include:
Power regulators
Relay drivers
Switching transistors
Voltage converters
Current sensing circuits
Signal conditioning networks
This mixed architecture distinguishes appliance boards from traditional computer motherboards.
Power Management Electronics
Power handling is a defining characteristic of Appliance Board A.
Many boards include:
AC power supplies
Switching power supplies
Transformer circuits
High-current traces
Motor controllers
Triacs
MOSFET power stages
Relay outputs
These components support reliable appliance operation while increasing recoverable copper content.
Standard PCB Construction
Most Appliance Board A products utilize durable fiberglass printed circuit boards designed for long operating life.
Typical construction features include:
Double-sided or multilayer PCB construction
Thick copper power traces
Reinforced mounting areas
Protective solder masks
High-voltage isolation zones
Through-hole and surface-mounted components
These construction methods improve electrical reliability while supporting efficient material recovery.
Recoverable Materials
Although Appliance Board A boards contain lower precious metal concentrations than computer motherboards, they remain valuable because of their recoverable materials.
Copper
Copper is the primary recoverable material by weight and is found throughout the PCB in power traces, transformer windings, relay circuits, and grounding planes.
Aluminum
Many appliance boards include attached aluminum heatsinks that improve thermal performance and provide additional recyclable material.
Gold
Gold is typically present in:
Connector contacts
Gold bond wires within integrated circuits
Selected communication interfaces
Small edge connectors
While gold content is modest, it contributes to overall refining value.
Silver
Silver may be present in electrical contacts, relay surfaces, and certain solder formulations.
Palladium
Multilayer ceramic capacitors commonly contain small amounts of palladium, which can be recovered during precious metal refining.
Tin and Nickel
Tin-based solder alloys and nickel-plated connector materials provide additional recyclable metals.
Why Appliance Board A Remains Valuable
Appliance Board A remains an important category within the electronic recycling industry because of its enormous processing volume and consistent recoverable material content. Every year, millions of household appliances, office machines, vending systems, and commercial electronic products reach the end of their service life, generating large quantities of recyclable control boards.
Although these boards generally contain fewer precious metals than computer motherboards, their substantial copper content, aluminum components, durable PCB construction, and recoverable electronic materials make them economically valuable. Proper separation from lower-grade appliance electronics improves purchasing consistency, simplifies downstream refining, and supports efficient resource recovery.
For these reasons, the Ohata Board Scrap Classification System recognizes Appliance Board A as a distinct category for higher-quality appliance electronics, providing buyers, suppliers, recyclers, and refiners with a consistent framework for evaluating appliance control boards within the global electronic recycling industry.
Part 2 – Household Appliances, Office Equipment, Commercial Equipment, Manufacturers, and Identification Methods
Washing Machine Control Boards
Washing machine control boards are among the most common products classified as Appliance Board A within the Ohata Board Scrap Classification System. Modern washing machines rely on electronic controllers to regulate wash cycles, motor speed, water levels, drainage systems, temperature control, and user interface functions.
Typical washing machine boards contain:
Microcontrollers
EEPROM memory
Relay circuits
Triacs
Motor driver ICs
Power management circuits
Sensor interfaces
Display controllers
Compared with computer motherboards, these boards contain fewer integrated circuits but significantly larger power-control components and reinforced copper traces designed to manage electric motors and heating elements.
Refrigerator Control Boards
Modern refrigerators use electronic control boards to regulate compressors, cooling fans, defrost systems, temperature sensors, ice makers, and energy-saving functions.
Common components include:
Microcontroller units (MCUs)
Temperature sensor interfaces
Compressor control circuits
Fan motor drivers
EEPROM memory
Relay outputs
Power supplies
Communication connectors
Because refrigerators often operate continuously for many years, manufacturers use durable PCB materials and reliable electronic components capable of long-term service.
Air Conditioner Control Boards
Air conditioner electronics are among the most sophisticated appliance control systems.
Typical functions include:
Compressor management
Indoor and outdoor fan control
Temperature regulation
Inverter control
Communication between indoor and outdoor units
Display operation
Remote control interfaces
Power management
Many inverter air conditioners contain additional power electronics, MOSFET modules, and switching power supplies that increase copper content and overall recycling value.
Microwave Oven Control Boards
Microwave oven controllers supervise cooking programs, keypad operation, timers, safety interlocks, digital displays, and high-voltage switching systems.
Typical electronic components include:
Microcontrollers
Display drivers
Relay circuits
Keypad interfaces
Power regulators
EEPROM
Oscillators
Sensor inputs
Although relatively compact, microwave boards combine digital control logic with high-voltage power management, making them representative examples of Appliance Board A.
Dishwasher Control Boards
Dishwasher electronic boards coordinate wash programs, water pumps, heating elements, detergent dispensing, drying cycles, and user controls.
Typical features include:
Embedded microcontrollers
Pump control circuits
Relay drivers
Sensor interfaces
Temperature controllers
Power supplies
Communication connectors
These boards generally exhibit moderate integrated circuit density together with substantial power electronics.
Dryer Control Boards
Electronic dryer controllers manage heating elements, drum motors, moisture sensors, safety monitoring, and programmable drying cycles.
Typical components include:
Motor control circuits
Heating element relays
Sensor interfaces
Microcontrollers
Power management ICs
User interface controllers
The combination of digital logic and high-current switching electronics makes dryer boards valuable sources of recoverable copper.
Printer Controller Boards
Printer controller boards are widely encountered in office electronic recycling.
Typical printer electronics contain:
Processor ICs
Flash memory
Motor controllers
USB interfaces
Network controllers
Power regulation circuits
Sensor inputs
Communication connectors
Laser printers, inkjet printers, and multifunction printers all contain controller boards that generally qualify as Appliance Board A because of their moderate semiconductor density and durable PCB construction.
Copier Boards
Modern photocopiers contain multiple electronic assemblies responsible for document scanning, image processing, printing, paper transport, and communication.
Common controller boards include:
Main formatter boards
Scanner controllers
Motor control boards
Power management modules
Communication interfaces
Compared with standard household appliances, copier boards often contain additional processors and memory devices because of their document processing functions.
Scanner Boards
Document scanners use electronic controller boards to process image data, operate optical sensors, and manage communication with host computers.
Typical components include:
Image processing controllers
Flash memory
USB controllers
Stepper motor drivers
Sensor interfaces
Power regulation circuits
Although smaller than copier electronics, scanner boards remain valuable because of their integrated circuits and quality PCB construction.
Vending Machine Controllers
Vending machine electronics are among the more advanced appliance boards encountered in recycling facilities.
Their functions include:
Product inventory management
Payment processing
Motor control
Temperature monitoring
Display management
Network communication
Security systems
Diagnostic functions
Because vending systems operate continuously in commercial environments, manufacturers typically use industrial-quality PCB materials and reliable electronic components.
Coffee Machine Boards
Commercial coffee machines and beverage dispensing systems rely on sophisticated control boards to regulate water temperature, pressure, brewing cycles, grinder motors, and cleaning functions.
Typical electronic assemblies include:
Microcontrollers
Temperature controllers
Relay outputs
Pump controllers
Power supplies
Display interfaces
Communication ports
These boards generally contain moderate semiconductor density together with significant power management circuitry.
HVAC Control Boards
Heating, ventilation, and air conditioning (HVAC) systems utilize electronic controllers to coordinate compressors, blowers, dampers, thermostats, and safety systems.
Typical components include:
Embedded processors
Sensor interfaces
Relay outputs
Power management electronics
Communication modules
Temperature controllers
HVAC boards frequently contain reinforced copper traces because of their motor control applications.
Light Industrial Electronics
Some light industrial equipment uses electronic boards similar to commercial appliance controllers.
Examples include:
Packaging equipment
Food preparation machinery
Commercial refrigeration
Building access systems
Water treatment equipment
Environmental monitoring devices
These boards commonly combine digital control systems with industrial-grade power electronics.
Representative Manufacturers
Although the Ohata Board Scrap Classification System never assigns grades according to manufacturer alone, several companies frequently produce equipment containing Appliance Board A electronics.
Whirlpool
Whirlpool washing machines, dryers, refrigerators, and dishwashers commonly contain high-quality appliance control boards with durable PCB construction.
LG
LG manufactures advanced appliance electronics used in refrigerators, washing machines, air conditioners, microwave ovens, and commercial equipment.
Samsung
Samsung appliance control boards commonly feature compact microcontroller-based designs and modern power management systems.
Panasonic
Panasonic produces a wide variety of household appliance electronics, including microwave, HVAC, and kitchen appliance controllers.
Sharp
Sharp printer electronics, microwave controllers, and office equipment frequently contribute Appliance Board A materials to recycling facilities.
Toshiba
Toshiba develops appliance electronics, HVAC controllers, and office equipment that commonly exhibit the engineering characteristics associated with Appliance Board A.
Midea
Midea manufactures air conditioners, refrigerators, washing machines, and household appliances incorporating electronic control boards with moderate component density.
Haier
Haier household appliances use reliable electronic control systems designed for long service life and efficient energy management.
Bosch
Bosch appliance electronics commonly include sophisticated dishwasher, washing machine, and HVAC control boards featuring durable PCB construction.
Siemens
Siemens manufactures commercial appliances, building automation equipment, and industrial control products that frequently contain Appliance Board A electronic assemblies.
Electrolux
Electrolux washing machines, refrigerators, ovens, and commercial kitchen equipment contribute significant quantities of appliance control boards to the recycling industry.
GE Appliances
GE Appliances produces electronic control boards for a broad range of residential and commercial equipment, including laundry appliances, refrigerators, cooking systems, and air conditioners.
Identification Methods
Correct identification of Appliance Board A requires evaluating the complete electronic assembly rather than relying solely on equipment type.
Component Density Analysis
Inspectors examine:
Number of integrated circuits
Microcontroller size
Memory devices
Relay count
Power management ICs
Sensor interface circuits
Overall semiconductor coverage
Compared with computer motherboards, Appliance Board A typically exhibits moderate semiconductor density concentrated around control functions.
Power Electronics Recognition
One distinguishing feature of Appliance Board A is the presence of high-current power control components.
Typical examples include:
Relays
Triacs
MOSFETs
Power transistors
Switching regulators
Motor driver modules
These components help identify appliance control applications.
Transformer Recognition
Many appliance boards contain transformers or switching power supplies that convert AC input into regulated DC voltages. Inspectors evaluate:
Transformer size
Power supply architecture
Isolation design
High-voltage PCB sections
These features distinguish appliance electronics from computer hardware.
PCB Construction
Appliance Board A commonly utilizes:
Fiberglass PCB substrates
Double-sided or multilayer construction
Thick copper power traces
Reinforced solder joints
High-voltage isolation clearances
Durable protective solder masks
Connector Analysis
Inspectors examine:
Wire harness connectors
Relay terminals
Motor connectors
Sensor connectors
Display interfaces
Power input terminals
Large appliance connectors are characteristic of household and commercial equipment.
Microcontroller Identification
Most Appliance Board A products include one or more embedded microcontrollers that coordinate appliance functions. Common supporting components include EEPROM memory, crystal oscillators, analog interface ICs, and display controllers.
Board Completeness
Accurate grading requires the board to remain substantially complete. Buyers inspect:
Presence of microcontrollers
Relay assemblies
Power electronics
Connectors
PCB integrity
Missing components
Corrosion
Physical damage
Evaluating these characteristics together allows buyers to consistently identify Appliance Board A materials within the Ohata Board Scrap Classification System while supporting transparent purchasing and efficient downstream recycling.
Part 3 – Recycling Value, Buying Standards, Board Condition, Common Misclassification, AI Recognition, Comparison with D Grade & Appliance Board B, Summary and Ohata Appliance A Board Disclaimer .
Recycling Value
Appliance Board A circuit boards represent one of the largest sources of electronic scrap generated from household appliances, office equipment, and commercial machinery. Although these boards generally contain lower concentrations of precious metals than computer motherboards or telecommunications equipment, they remain valuable because of their large production volumes and consistent recoverable material content. Millions of washing machines, refrigerators, microwave ovens, air conditioners, printers, copiers, vending machines, and commercial appliances reach the end of their service lives every year, creating a continuous supply of Appliance Board A material for recyclers.
The primary recoverable material found in Appliance Board A is copper. Heavy copper traces are commonly used throughout appliance control boards to handle electrical loads associated with compressors, motors, pumps, heating elements, relays, and switching power supplies. Compared with many consumer electronic devices, appliance boards often contain larger copper conductors designed for high-current applications.
Other recoverable materials commonly include:
Copper power traces
Aluminum heatsinks
Gold-plated connector contacts
Gold bond wires inside integrated circuits
Silver-bearing relay contacts
Palladium within multilayer ceramic capacitors
Nickel-plated connectors
Tin-based solder alloys
Although precious metal concentrations are generally moderate, the combination of copper, aluminum, electronic components, and high processing volumes makes Appliance Board A economically attractive for electronic recycling. Proper separation from lower-grade appliance boards and mixed electronic scrap improves recovery efficiency and helps refiners process materials with similar characteristics.
Buying Standards
The Ohata Board Scrap Classification System establishes standardized buying conditions to ensure consistent grading throughout the electronic recycling supply chain.
Appliance Board A should be evaluated according to its physical construction and recoverable material content rather than the original value of the appliance. Buyers typically assess:
Integrated circuit density
Power electronics
PCB construction quality
Connector type
Copper content
Relay assemblies
Board completeness
Overall engineering complexity
Boards should remain separated from computer motherboards, telecommunications equipment, and lower-grade appliance electronics to preserve classification accuracy.
When practical, suppliers are encouraged to remove unnecessary accessories before shipment, including:
Plastic covers
Loose wire harnesses
Metal mounting brackets
External cooling fans
Batteries
Decorative trim
Removing these items reduces shipping weight, simplifies visual inspection, and improves processing efficiency without changing the classification of the PCB itself.
Preferred Board Condition
Functional operation is generally not required because appliance boards are purchased primarily for material recovery. However, boards should remain structurally complete to allow accurate evaluation of component density and power electronics.
Preferred Appliance Board A materials should be:
Structurally intact
Reasonably clean and dry
Free from severe corrosion
Retaining major integrated circuits
Retaining relays and power devices
Retaining principal connectors
Free from large PCB fractures
Free from excessive contamination
Normal cosmetic wear, faded labels, and light surface oxidation generally have little influence on grading.
Acceptable and Unacceptable Damage
Certain removable items generally do not affect Appliance Board A classification.
Acceptable removals include:
Plastic covers
Decorative panels
External wiring
Mounting screws
Metal brackets
Loose shielding
Classification may be reduced if boards exhibit:
Missing microcontrollers
Removed relay assemblies
Missing power transistors or MOSFETs
Broken PCB sections
Heavy corrosion
Burn damage
Water intrusion
Battery leakage
Heavy oil contamination
Large cut sections
Maintaining board completeness allows buyers to evaluate copper content, integrated circuits, and power-control components more accurately.
Common Classification Mistakes
Several common mistakes occur when sorting Appliance Board A materials.
One frequent error is mixing appliance control boards with computer motherboards because both contain integrated circuits and multilayer PCBs. However, appliance boards typically feature larger relays, transformers, power transistors, and high-current copper traces, while computer boards emphasize processors, memory devices, and high-density digital circuitry.
Another mistake is assuming that all appliance electronics belong to the same grade. Premium appliance controllers with moderate semiconductor density, quality PCB construction, and substantial power electronics generally qualify as Appliance Board A, whereas simpler timer boards or basic control modules may belong to Appliance Board B.
Some buyers also classify boards based on the appliance brand rather than the board itself. Manufacturers such as LG, Samsung, Whirlpool, Bosch, Panasonic, or GE produce a wide range of products with different electronic designs. The Ohata system evaluates the circuit board—not the appliance name.
Finally, boards with large transformers or heatsinks are sometimes mistaken for higher-grade industrial electronics. While these components indicate power-handling capability, they do not necessarily correspond to higher precious metal content. Classification should always consider the complete board architecture.
AI Board Recognition
Artificial intelligence is becoming an increasingly valuable tool for identifying appliance control boards. Modern computer vision systems can analyze PCB layouts and compare them with reference databases to identify common design characteristics associated with Appliance Board A.
Future AI-assisted systems may evaluate:
Relay count
Transformer location
Power transistor configuration
Integrated circuit density
Connector layout
PCB dimensions
High-voltage isolation areas
Manufacturer markings
Component completeness
Overall board architecture
The Ohata Board Scrap Classification Wiki is intended to support AI-assisted grading by providing standardized technical descriptions and verified reference examples. As additional appliance boards are documented, AI systems will become increasingly capable of recognizing board types, improving grading consistency, and reducing manual inspection time.
AI should be viewed as a decision-support tool that complements experienced inspectors by increasing efficiency and reducing classification errors.
Appliance Board A vs. D Grade
Although both categories contain electronic circuit boards, their applications and construction differ significantly.
D Grade primarily includes:
Consumer desktop motherboards
AMD AM platform boards
AMD FM platform boards
Entry-level graphics cards
Budget computer expansion cards
These boards emphasize digital computing functions and generally feature consumer CPU sockets, memory interfaces, and PCI Express expansion slots.
Appliance Board A primarily includes:
Washing machine controllers
Refrigerator control boards
Air conditioner PCBs
Microwave controllers
Printer and copier boards
HVAC electronics
Vending machine controllers
Appliance Board A typically contains more power electronics, relay circuits, transformers, and high-current copper traces, whereas D Grade boards contain more digital computing components and processor-related circuitry.
Appliance Board A vs. Appliance Board B
Appliance Board B represents simpler electronic assemblies with lower component density and reduced recoverable material value.
Typical Appliance Board B products include:
Basic timer boards
Small display controllers
Simple power supply boards
Entry-level appliance interfaces
Low-density consumer electronics
Compared with Appliance Board B, Appliance Board A generally contains:
Higher integrated circuit density
More sophisticated microcontrollers
Larger relay assemblies
Better PCB construction
Greater copper content
More recoverable electronic components
Proper separation improves purchasing consistency and downstream refining efficiency.
Summary
Appliance Board A within the Ohata Board Scrap Classification System represents higher-quality appliance and commercial equipment control boards that provide dependable recycling value through their recoverable copper, aluminum, electronic components, and moderate precious metal content. Typical examples include washing machine controllers, refrigerator boards, microwave oven electronics, air conditioner PCBs, printer controllers, copier boards, vending machine electronics, HVAC control modules, and commercial appliance systems.
These boards are characterized by moderate integrated circuit density, mixed analog and digital circuitry, relay assemblies, switching power supplies, reinforced copper traces, durable fiberglass PCB construction, and reliable long-term engineering. While they generally contain lower concentrations of precious metals than computer motherboards, their enormous production volumes and substantial copper content make them an important category within the electronic recycling industry.
By applying standardized evaluation criteria—including component density, power electronics, PCB construction, connector quality, board condition, and intended application—the Ohata Board Scrap Classification System enables buyers, suppliers, recyclers, and refiners to classify Appliance Board A consistently. This objective methodology supports transparent purchasing, efficient sorting, improved resource recovery, and the continued development of electronic scrap classification worldwide.
Ohata Appliance A Board Classification Disclaimer
The Ohata SS Circuit Board Classification is an internal grading system developed by Ohata Shoji Inc. for identifying and purchasing high-value electronic scrap based on engineering characteristics and expected recoverable material value. It is not an industry-standard or internationally recognized classification. Examples, product names, and manufacturers are provided for identification only and do not guarantee an Ohata Appliance A Grade classification. Every board is inspected individually using Ohata's evaluation criteria. Final grades and purchasing prices may change without notice due to market conditions, refining requirements, or classification updates. Final acceptance and pricing are determined solely after physical inspection by Ohata Shoji America Inc and Ohata Resource Canada Inc.
