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It is during the process of making paper that the water-mark is applied. The pulp in a highly saturated statepasses through "beaters," "digesters" and other machineswhere it is given its sizing and the proper chemicals areadded to bleach, color and otherwise prepare it. Whenready the pulp is allowed to flow upon a fast-movingscreen which, by oscillation and shaking removes a con-siderable quantity of the water. Near the end of thisendless screen there is suspended a hollow cylinder calleda "dandy roll," the purpose of which is to squeeze morewater from the pulp. Watching a machine in operation one sees only a wetsurface moving rapidly toward the dandy roll but leav-ing the roll, as if by magic, one sees the partially formedpaper rapidly moving toward the drying rolls. Theselatter are a battery of large-diameter steam-heated rollsover which passes a cloth belt or "blanket." After passingunder the dandy rolls the now partially dry paper passesalmost immediately to the drying process. It is pickedup by the blanket and travels over and around each dry-ing roll in such a manner that both sides are presented to |
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