Yes but how expensive? The color range in technical diagrams is extremely small ( I would say less than 10 colors, never? gradients). How much extra would it co

Yes but how expensive? The color range in technical diagrams is extremely small ( I would say less than 10 colors, never? gradients). How much extra would it cost to print $5? On a $50 book I would argue the increase is negligible while the apparent quality increases by quite a bit (to me at least).