[mestizojoe]

Has anyone worked with color standards which are used to determine the concentration of, for example, some chemical in a solid material.  I have a stain which will bind to cloth depending on how much of an additive is present in the cloth.  I was hoping to find colored cards which I could standardize to determine concentration in a cloth.  I'm hoping to find some suggestions of where I can find something like this.

Thanks

[fledarmus]

There are a number of different color scales, and Wiki has a lot of interconnecting pages devoted to the topic. Here is a starting point that might be helpful for you:

http://en.wikipedia.org/wiki/Chromaticity_diagram#The_CIE_xy_chromaticity_diagram_and_the_CIE_xyY_color_space