When printing etchings, three felts are generally used. Closest to the paper, a thin absorbent felt called the Sizing Catcher (95% wool, 5% polyester) absorbs much of the water and sizing removed from the paper during the printing process.

Next, the Forming Blanket, the thickest of the felts, (50% wool, 50% polyester) acts as a cushion to cast the paper over the etching plate.

On the top, next to the roller, is the Pusher Blanket (75% wool, 25% nylon). This felt takes the abuse of the roller.