White and black are not primary colors, white is the sum of all colors, and black is the total absence of color.
Dye is not paint, it doesn't produce color the same way. The "black" dye that is available is a mixture of 3-5 other colors, carefully ratioed to cancel out color, which accounts for its higher cost. "White" dye would be a good trick, which the dye industry can't do, at least not yet.
|