Re: Gum Calibration 2 (How to read color samples?)
I think you need to go a little further with your analysis. You should also remember the ORDER of printing each layer and that the curve for the first colour laid down will have a different curve to the second; and the third yet another curve than the previous two. My reasoning is that the first layer is on paper only, the second on paper + varying amounts of pigment/gum and again for the third layer. Also, if you are going to modify your solution strength after you have designed your curve then you will have to re-design the curve again using the new solution strength otherwise exposure and development will be messed up.