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Printing Drawing Paper

dry, grains, silver and sensitized

DRAWING PAPER, PRINTING ON.—Very good effects may be produced by printing with silver chloride on a rough drawing paper such as Whatman's. The picture should not be mounted, but printed like engravings with very wide margins. The roughness of the drawing paper gives that artistic dull appearance of the engraving. The method of preparing the paper is as follows: The drawing paper is cut into convenient sizes and floated on a shallow dish containing— Gelatine 25 grains Water 6 ounces Salt (pure) 25 grains One minute will suffice, when it is removed and hung up to dry. When dry a slight pencil mark is made on the salted side for future guidance. The paper may be sensitized by floating on the silver bath used for albumenized paper, or the silver solution can be applied with a broad camel-hair or bristle (q.v.). The strength of the solution should be about 6o grains of silver nitrate to the ounce. When sensitized the paper is attached to clips and hung up to dry in a yellow light. When dry the usual printing operations are performed. A piece of black paper is cut the size of the sensitized paper, and a hole cut in the centre the size and shape of the picture. This is used as a mask in printing, and gives the wide margin. Printing is carried

Jlit to a deeper extent than with albumen paper, as there is always an 'unavoidable loss of brilliancy in the toning and fixing operations. The following toning bath answers well : Gold bichloride I grain Sodium bicarbonate 40 grains Distilled water xo ounces rills gives the black engraving tone so much admired. After toning fix with ordinary ten per :ent. hyposulphite bath and well washed.

DRAWINGS.—Chalk and pencil drawings may be fixed so as not to suffer from slight ibrasion by washing them with skimmed milk, or with water holding in solution a little isinglass 3r gum. If milk be used, great care must be taken to thoroughly deprive it of the whole of the :ream, or it will cause the drawing to look streaky. An easy way is to float the drawing on the surface of the liquid placed in a shallow dish, after which it is placed in an inclined position upon white blotting paper to dry.

In photographing drawings the paper or board upon which they are drawn is sometimes yellowed by age. This gives with the ordinary photographic process a dull, dirty appearance. Et is very necessary in these cases to make use of the isochromatic process (q.v.)