sunnyhope -
it's the stuff that you soak your fabric in so you can print on it.
the chemicals in there produce a chemical reaction with the ink in inkjet
printers to create a washable, permanent copy of whatever your printer sees on the computer screen. it's used for making labels for the backs, along with other craft items, such as doll faces and like that.
so whatever you type in microsoft word or whatever pictures you have onscreen can be printed permanently on fabric.