u/DramaticAd3989

I am engraving on Birch plywood on from Bambu labs. A lot of plywood engraving ends in yellow wood color. This engrave have gotten more darker. What wood should I buy so i could get this dark or more dark engraving. Because now from 6 pieces about 4 of them give me yellowish. I know about borax method and acrylic paint I want to get this thing naturally