Page:Paper and Its Uses.djvu/146

Profile Papers are specially ruled papers for the use of engineers and surveyors; ruled, or printed from engraved roll. The usual pattern has quarter -inch squares, divided into five horizontal sections.

Programme Papers.—Soft papers, white or tinted, used for concert programmes, in order that there shall be no rustle when the pages are turned. The light weight (44 Ib.) of drying royal is sometimes used as a programme paper.

Pulp Boards are boards of one thickness only, made on the Fourdrinier machine, well sized, well rolled, in various substances and qualities, and in a variety of useful tints. Used for all purposes for which cards are employed.

Railway Buffs.—Cheap buff papers used for forms and envelopes for railway business. Forms are printed on glazed buffs, super-calendered papers; envelopes are made from M.G. buffs.

Rocket Paper.—Thick coarse paper used for making cases for rockets and other fireworks. White, coloured, or fancy papers are pasted on the outside of the firework cases, and the touch paper fastened on last.

Royal Hands.—A term used for wrapping papers made to royal size (24 by 19 inches).

Safety Cheque Papers are specially prepared by printing, as a groundwork, a small design in ink which is fugitive if treated with chemicals, or if erasure is attempted. Other safety papers are made by adding sensitive chemicals to the pulp, or by impregnating the finished paper. These additions act as detectives, as any alteration or attempt to remove the original writing results in coloured patches which betray the work.

Sampling Papers.—Coloured papers used for the display of textile and other samples, usually deep blue or deep yellow. Made in medium, 25 Ib. per ream of 480 sheets, and also supplied in rolls.

Sealings.—Thin tough M.G. papers used as parcel papers. Being glazed on one side, sealing wax adheres readily to the. rough side. Made in various substances and colours.

Sectional Papers are papers with squares of definite measurement, ${\tfrac {1}{4}}$, ${\tfrac {1}{8}}$, ${\tfrac {1}{10}}$, ${\tfrac {1}{12}}$, ${\tfrac {1}{16}}$ inch, or millimetre