CAMERAS AND PICTURE-MAKING 



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will judge the length of exposure needed quite accurately, 

 without preliminary trials. 



The prints are to be left in the fixer for ten minutes, then 

 washed for twenty minutes in running water. Dry the prints, 

 face down, on cheesecloth stretched on a wooden frame, or if 

 glossy prints are desired, dry on a clean glass or porcelain surface. 

 Print papers come in a variety of grades. The surface may be 

 dull, matte, glossy, etc. The paper may be soft, normal, con- 

 trast, portrait, etc., according to the effect desired. Contrast 

 papers are needed to give proper values in prints of weak nega- 

 tives, soft papers for 

 contrasty negatives, 

 those in which the 

 high lights and shad- 

 ows are very strong. 



Lantern slides and 

 transparencies are 

 printed in the same 

 fashion as paper 

 prints, using a lantern- 

 slide negative or trans- 

 parency negative in 

 place of the print 

 paper. The exposure will be about one-half second at a foot from 

 the light. Such negatives are developed in the same way as are 

 plates. The image should be allowed barely to begin to come 

 through on the back of the plate before it is placed in the fixing 

 bath, as the plate needs to be thin to let the light through it readily. 

 A mat is laid on the film face when the plate is dry, with an open- 

 ing in it large enough to show the picture. This is covered with a 

 cover glass the same size as the plate, and plate and cover glass 

 are bound together with adhesive paper strips applied to the edges 

 (Fig. 164). Lantern slides, transparencies, and prints may be 

 tinted by applying to the film side by means of camel's hair 

 brushes transparent water colors purchased for the purpose. 



FIG. 164. A lantern slide 



