I started what turned into a remarkably lengthy and diverse Facebook thread about Crayola® brand wax crayons. Some people use them to dye fabrics, particularly cotton T-shirts.
Poking around the Web, I get the idea that Crayolas are colored by Procion MX reactive cotton dyes, which come in a vast variety of colors. The dyes are suspended in particulate form in the wax, rather than dissolved. Some people fix the dye in the fabric after dyeing by soaking the fabric in salt water, a practice that certainly sounds like reactive cotton dyes. Anyone know if this information is correct? Obviously reactive cotton dyes don't have much use in histology. If anybody wants to friend me on Facebook, I'm the Bob Richmond with "Harvard" after his name. Bob Richmond Samurai Pathologist Knoxville TN _______________________________________________ Histonet mailing list [email protected] http://lists.utsouthwestern.edu/mailman/listinfo/histonet
