Hi! I am looking for some help with understanding what are the "usual" values for concentration of pigments in textile fibers. Would appreciate any help, links, comments.. I did some search on the Internet. The resource that I was able to find is this: http://books.google.com/books?id=yS...ts=p43ArNpBND&sig=r3lo02jzc6v7kgjzTYEJeLAAAZo It says: ... reflection curves obtained for a yarn made with 0.125%, 0.375% and 1.25% of a 25% concentrate of Yellow 17 in polypropylene... Does this mean that the concentration of pigment in yarn is 0.125%, 0.375% and 1.25%? Thank you!