Silkpaint Fiber Etch dissolves plant fibers like cotton and rayon and linen. You use it on blends like cotton/poly or silk/linen. You draw a design on the fabric with the squeeze bottle and then iron. The plant fiber is dissolved and washes away leaving a cutwork or reverse applique effect. There are lots of ways to use it and instructions and suggestions come in the box. It can be irritating to the skin and eyes so you have to be careful using it.