[ad_1] noun
- a mask of thin paper laid over an illustration to shield certain areas when using an airbrush.
- Printing. a mask of strong paper set in a rectangular frame attached to the tympan of certain presses and cut up so as to prevent accidental soiling or printing by furniture or the chase.
noun
- printing a light rectangular frame, attached to the tympan of a hand printing press, that carries a parchment sheet to protect the nonprinting areas