Answer: deckel

AnswerCrossword Clue
deckelthe irregular, untrimmed edge of handmade paper, often used for ornamental effect in fine books and stationery, now often produced artificially on machine-made paper
deckela frame used in making paper by hand, also DECKLE
deckelboard, usually of stainless steel, fitted under part of the wire in a Fourdrinier machine for supporting the pulp stack before it is sufficiently formed to support itself on the wire