GreenTRF is used to seal the toner "circuit image" after it has been transferred to the circuit board. Toner is a very porous material. If left alone and the board was etched, you'd wind up with pitted surfaces or even hairline breaks from cracks that were too small to see with the naked eye.
GreenTRF solves this problem by completely encapsulating the toner image in one easy step. An absolute "must have" for producing quality boards.
Each pack contains a strip of foil 8" Wide x 15' Long