Answer

The difference between standard, through super special grade is as follows.
Basically, grade is determined based on the number of compositions, color evenness, grain patterns, texture or feeling, appearance, and the condition of surface. We strictly check the board one by one according to our strict quality standard. These composition boards are strongly bonded and completely dried so that it will not be bent in the future.
Regarding the difference between "super special" and "special grade", it is difficult to give you a precise definition. Both grades use same material, but every Kaya wood has a little different appearance and colors
because of natural wood. Basically, we focus on the colors, appearance, texture and the distances between each ring and grain pattern to determine “super special” and “special” grade.