They are actually talking about a paste that is bleach. I goggled it and found on the "Sew News" website that bleach paste is used to create bleached out patterns on fabric together with stencils. It is spread on. I had never heard of it before. I can think of some interestng applications using embossing plates...hmmm. Anyhow, the bleach paste is evidently available at the grocery store in the laundry detergent aisle although I have never seen it before...but I haven't looked before either...now, I'm on the hunt! LOL!!!