1, color difference: Angola black dyed board is a dyed board with a dark black or dark brown appearance, while the undyed Angola blackboard is a natural wood color with a light brown or gray color.

2. Surface treatment difference: Angola black dyed board will be coated or painted after dyeing to improve its appearance and protect the wood. However, the undyed Angolan blackboard has not undergone dyeing and additional surface treatment, and retains its natural wood grain and color.