Another method of producing a high finish is known as “flinting.” In this process the paper is mechanically polished by smooth flint stones and gains a very high luster. Such papers are most widely used as box covering. A similar effect is obtained by friction calenders, which consist of two chilled iron rolls with an intermediate roll of hard paper. The top roll rotates at a higher speed than the others.
COATING ROOM, APPLETON COATED PAPER CO.
This view of the “wet end” of the coating machines shows the rolls going through the coating process, the web of paper traveling along the drying racks appears in the background.
The coating may be dyed to any color desired, so that coated and glazed papers are obtainable in a wide variety of shades.
FINISHING-ROOM, CRANE & CO.
The machine on the right is a plater.
Gummed Papers.—Gummed papers are made by passing the web through a machine, which coats it with glue, after which it passes over drying apparatus and is wound into rolls ready for finishing.
Gummed paper for labels is usually finished in sheets, while for sealing tape and box stays it is ordinarily made up into rolls.