WHILE FilmDevelopingHang-ers and Core Plate Racks are made of a metal that is not subject to corrosion, there is nothing to prevent them from taking on a plating of silver from the fixing bath which gives them a rough surface. When this silver is removed they are quite smooth again.

This silver deposit is sometimes sufficient in the No. 4 Film Hangers to cause the film to adhere to the rough surface in the groove or channel in which the film fits. The difficulty is usually encountered in warm weather and is overcome when the rough deposit is removed. The best method we have found for removing this silver deposit is the use of the following tray-cleaning formula:

Sodium bichromate 1 ounce Sulphuric Acid (C. P.) 2 ounces Water to make 32 ounces.

The length of time the Hangers should remain in this solution depends upon the quantity of silver to be removed. An immersion of ten minutes is usually sufficient. When the Hangers are removed from the cleaning solution rinse them thoroughly in water and remove any reddish colored scale, which may adhere to the Hanger, with a brush. Repeat the treatment if necessary. It is advisable to use a glass or hard rubber tray for the cleaning process.

From An Eastman Portrait Film Negative By Thos. H. Ince Studios Culver City, Cal.

From An Eastman Portrait Film Negative By Thos. H. Ince Studios Culver City, Cal.

If this solution is used for cleaning enameled trays pour the solution in, tip the tray so the entire surface is covered, and immediately pour the solution back into the bottle. Rinse the tray immediately and swab the inside with a tuft of cotton. The tray will be perfectly clean. If left in the tray for a considerable length of time this solution would injure the enamel.

February. International Convention P. A. Of A Kansas City, Mo., May 1-6,1922

THE most convenient Conven-tion date has not yet been found. The perfect hall has not yet been built. The best program is yet to be given.

The manufacturers and dealers, comparatively speaking are still in the "one ring circus" class, as to what they will be at future Conventions; but the one feature of a National Convention, that is not experimental in attraction, in interest and education, is a large exhibit of portraits, representing the highest achievement in photographic art, produced by the leading photographers of the world. This is what we want the Kansas City exhibit to be, the largest, the best, the last word or work in photography.

By reputation, P. A. of A. is now international. By service to its membership it must also be individual and local. It can help you only in the proportion that you contribute to its efforts and activities. One brick won't make a house, one photographer won't make an organization, one photograph won't make a display, but a lot of bricks will make a mansion, a lot of photographers will make the P. A. of A. and a lot of portraits will make the Kansas City exhibit what we want it to be: A credit to our profession, a credit to the board, and a credit to Kansas City.

The time to start is right now. May first is not far away.

Convention exhibits are not intended for, nor prepared by a few, but for and by every member of the organization. Your organization wants you on its roll of honor as an exhibiting member.

The KANSAS CITY Convention will reflect honor to your profession, if you do your whole duty toward making it a success. We want your photographs for the Convention Exhibit but most of all, we want you, one thousand strong at Kansas City.

Are YOU with us? A. H. Diehl, First Vice-President, Sewickley, Pa.

From An Eastman Portrait Film Negative By Thos. H. Ince Studios Culver City, Cal.

From An Eastman Portrait Film Negative By Thos. H. Ince Studios Culver City, Cal.

And now it's time for a photograph of the three of us together - Mother, Helen and Daddy - and just in time for grandmother's birthday.

February International Convention P A Of A Kansas  StudioLightMagazine1922 39A Chestnut Hill Estate, From A Portrait Film Negative.

A Chestnut Hill Estate, From A Portrait Film Negative. By W. N. Jennings Philadelphia. Pa.