Friday, October 19, 2007
Homework from Graydon
So here is my mix of 5YR 6/4 from Beth's (Liberace's) palette. I used Cad red lt., Ultramarine, Burnt Sienna, Cad yellow, Alizarin Crimson, and flake white. It was a beast to control and took a long time to come around.
Also, the other picture is from some color charts I did a couple of summers ago, but have proven to be worth their weight in gold. It is similar to the pigment file color charts that Graydon has us all doing, but it is a step further in one direction. Namely, what happens when you change values with a certain pigment. Hue shifts and chroma shifts become very apparent. The nice thing about having this is that I can take any chip from the munsell big book and look through my list of pigments at that chroma and find what comes the closest at that value.
The other day when I was mixing up a high chroma string of 5PB I was shocked by what pigments I was using to achieve the string. At value 9 I used ultramarine and Diox. and white. By value 7 I was using straight cobalt blue and white, by value 4 I was using nothing but pthalo and white, near value 2 it started to go toward Pthalo Blue Green. Really weird but cool. If I had decided that this string was going to be hit by Pthalo or Cobalt, I would have missed it by a long way on several values. It was really nice to have that reference to fall upon when I was trying to mix to find out what a certain pigment does exactly at a certain value. To anyone who doesn't want to be ignorant of what exactly each pigment in their drawer does at a certain value I highly suggest this exercise. It took me a little over 2 months to complete, and that was working everyonce in awhile for a little over 200 paints. Also of great interest is the differences between blacks. As Graydon points out their is do difference between a "Chromatic Black" i.e. one mixed with several pigments and one that is made from one source if that source tends to the same direction as the chromatic black once mixed with white.