ART PRINCIPLES IN PORTRAIT PHOTOGRAPHY
Dissolve one part Red Prussiate of Potash in fifteen Medium A. parts of water. Wrap the bottle in yellow paper to protect the solution from decomposition by light. Prepare a solution of one ounce of Hyposulphite of Soda in fifteen ounces of water. These two items are from the Cramer Reducing Formula. It is not our object in artistic photography to subject the whole negative to a bath of a combination of the prussiate and the soda, for that would reduce the plate evenly, producing no change in the artistic arrangement. Our principle is based on local reduction, and it is important that the reducer be so mixed as to attain its greatest strength. By taking six parts of the dissolved Red Prussiate of Potash to eight parts of the solution of Hyposulphite of Soda the limit of strength is attained. If more prussiate is used the soda will not have the power to remove it, and the etching ceases. The nega tive when fixed and thoroughly cleansed may be worked upon with this mixture.
Washing the negative with the hand will not clean it. Pour some of the solution of hyposulphite upon the film of the negative, and with the aid of cotton rub it gently, then subject the plate to running water. The plate is clean if the water remains evenly upon the surface when it is held horizontally.
In illustration 59 there is an architectural line ex tending from^the shoulder to the upper frame. It is