 In hand papermaking, a "deckle" is a removable wooden frame or "fence" placed into a mould to keep the paper pulp slurry within the bounds of the wire facing on a mould, and to control the size of the sheet produced.The mould and deckle is dipped into a vat of water and paper pulp that has been beat (fibrillated).The pulp is quickly scooped out of the vat and the mould and deckle is shaken as excess water is drained off.