Here is some helpful information on using RIT dyes: http://www.pburch.net/dyeing/allpurposedye.shtml AK Best's book on dye gives instructions on using RIT from a fly tyer's perspective. These next dyes used to be like RIT but now the wool dye is a separate item from the cotton dye: http://www.wcushing.com/acid_dye_color_card.htm Great fly tyer colors. Silver gray green and bronze were two of Polly Rosborough's favorite colors. Bill