Few photographers make a business of rush commercial or portrait work, but you can, no doubt, recall a number of times when it would have been decidedly to your advantage to have turned out prints quickly. Drying of negatives is the usual hindrance to such quick work, but if the occasion arises and you must get out prints in a hurry, Portrait Film is the material you should use for your negative making. The drying method is as follows:

To an amount of water necessary to properly immerse the film, add Potassium Carbonate gradually, until no more will dissolve. Then carefully filter the solution which should now have an oily appearance. After the film negative has been thoroughly fixed in the Acid Fixing and Hardening bath, it should be rinsed thoroughly for several minutes and the surplus water removed from both sides with a soft rubber squeegee. If the fixing and hardening has been thorough and the squeegee is clean, there will be no danger of scratching the negative.

The negative is now immersed in the saturated solution of Potassium Carbonate for two or three minutes, drained, and the excess carbonate solution removed in the same way as the excess water in the previous operation. The negative, which now feels quite hard and dry but seems to have a greasy surface, is laid on a perfectly clean surface and both sides are polished with a soft cloth.

The negative is now ready for printing and the entire operation of drying has not required more than four minutes.

After the required number of prints have been made, the negative should be washed thoroughly for at least fifteen minutes in water at a temperature below 70° F. in order to thoroughly remove the Potassium Carbonate from the film. If the water is over 70° F. the gelatine is very likely to reticulate during washing. No trouble need be feared from reticulation if the film is hardened in a 5% Formalin bath following the Acid Fixing Bath.

This quick drying method is not practical for use with plates because in the subsequent washing the gelatine film is most likely to leave its glass support and the negative be ruined. This does not occur with film because of the nature of the film and the greater adhesion of the gelatine to its film support.

Quick Drying Of Negatives StudioLightMagazine1919 261Eastman Portrait Film Negative, Artura Print By Frank W. Schaldenbrand Detroit, Mich.

Eastman Portrait Film Negative, Artura Print By Frank W. Schaldenbrand Detroit, Mich.