Amateur Photographer & Cinematographer (1936)

September i6th, 1936 ih[ amateur photographer 6 CINEMATOGRAPHER q Exhibitions and Competitions The name a^yid address in brackets indicates to whom to apply for further particulars. CURRENT AND FUTURE. The Amateur Photographer Monthly Competitions for Beginners, Intermediate and Advanced Workers. — Entries, September 30. Rules in issue of August 26. The Amateur Photographer Novices’ Competition. Prizes of Roll Films for Novices’ Prints. Closing date, September 30. Rules in this issue. The Amateur Photographer Special Competition, illustrating “ Can the Camera Lie ? ” Entries close September 30. Wallace Heaton “ 35-mm. Film Competition.” Cash prizes every week. Open to readers of The Amateur Photographer only. Full particulars in advertisement page in this issue. XVme Salon International de Photographie de Bruxelles. — Open, May-October. {M. Maurice Broquet, Secretaire du Salon, Rue du Sceptre, 77, Brussels.) Salon International de Fotograhea de Madrid. (Sehor Secretario de la Sociedad Fotografica de Madrid, Calle del Principe, 16, Madrid.) The Folkestone Camera Club, Competition for the best photographs of Folkestone. — Entries close, September 30. Cash prizes. (Ernst. F. Davidson, Hon. Secretary, Folkestone Camera Club, Town Hall, Folkestone.) Chicago International Salon. — Open, July 23-October 4. (Alex. J. Krupy, Chicago C.C., 137, North Wabash Avenue, Chicago, Ill.) XXXIe Salon International D’Arte Photographique de Paris. — Open, October 3-18. (M. E. Cousin, Secretaire de la Societ6 Frangaise de Photographique, 51, Rue de Clichy, Paris (qe).) Tweede “Focus” F'otosalon. — Open, September 12-27. (Focus, Ltd., Fotosalon, Bloemendaal, The Netherlands.) South African International Salon. — Open, October. (Hon. Secretary, Johannesburg P.S., P.O. Box 7024, Johannesburg, South Africa.) Royal Photographic Society Annual Exhibition. — Open, September 12-October 10. (Secretary, R.P.S., 35, Russell Square, London, W.C.) Buffalo C.C. Fourteenth Annual Salon of Photo¬ graphy. — Open, September 6-27. (H. W. Schone wolf, 528, Elmwood Avenue, Buffalo, N.Y., U.S.A.) Morecambe, Heysham and D.P.S. — Open, September 9-16. (James F. Levisohn, B.Sc., 5, Douglas Drive, Heysham, Lancs.) Fotoclub Zagreb, Fourth International Salon of Photography. — Open, October. (Fotoclub Zagreb, Masarykova II, Zagreb, Yugoslavia.) London Salon of Photography. — Open, September i2-October lo. (Hon. Secretary, London Salon of Photography, 5a, Pall Mall East, London, S.W.i.) Lincoln Camera Club. — Open, October 15-November 12. (Miss E. Redfem, 146, Burton Road, Lincoln.) XII Salon International de Fotografica, Zaragoza, Spain. — Open, October. (Secretary, Sociedad Foto¬ grafica de Zaragoza, Plaza de Sas, 7, Zaragoza, Spain.) Third Canadian International Salon of Photographic Art. — Open, October 23-November 15. (Exhibition Secretary, Canadian International Salon of Photo¬ graphic Art, National Gallery of Canada, Ottawa, Canada.) Windlesham C.C. — Open, September 25-26. Classes for members (Beginners, Advanced, Professional, also Open Class). (J. C. Hayward, Hallgrove, Bagshot, Surrey.) IV International Hungarian Exhibition. — Open, October 24-November 9. (Secretary, Magyar Amat^rfenykdpezok, Orsz. Szovetsege, Budapest VII, Erzs6bet-korut, 9, Hungary.) Rotherham P.S. Forty-seventh Annual Inter¬ national Exhibition. — Entries, September 21 ; open, October 14-17. (E. George Alderman, Ruardean, Newton Street, Rotherham.) Service Co. (London), Ltd., Happy Camp Snaps Competition. Cash prizes. — Entries, September 30. (Service Co. (London), Ltd., 273, High Holborn, London, W.C.i.) Coronet Midget Camera Competition. Cash prizes. — Entries, September 30. (Coronet Camera Co., 310, Summer Lane, Birmingham, 19.) Eighth International Photographic Salon of Japan. — Entries close in Tokyo, September 30 ; open, November (Tokyo and Osaka). (Sec., International Photographic Salon, Tokyo, Asahi ShUnbun, Tokyo, Japan.) Photographic Society of America 100 Print Salon. — Entries, October I. Limit 4 prints. Entry fee $1.00. (Dever Timmons, Salon Secretary, Box 216, Cashocton, Ohio.) The Third Yorkshire Salon, 1936, at Mortimer Gallery, City Hall, Hull. — Entries, October i ; open, October 3r-November 30. (Graham Fletcher, Netherlea, Kirk Ella, East Yorks.) G.E.C. (Coventry) Third Annual Exhibition. Open classes for members of Midland Federation Clubs. — Entries, October 14 ; open, November 9-14. (P. H. Crosby, Hon. Sec., G.E.C. Photographic Society, General Electric Co., Ltd., Coventry.) Johnson’s “ Holiday ” Competition. Cash prizes. — Closing date, October 31. (Johnson & Sons, Ltd., Hendon, N.W.4.) U.P. International Exhibition of Photography, 1936. (Lucknow). — Entries, November i ; open, December 5, 1936-February 4, 1937. (Dr. K. N. Mathur, D.Sc., Hon. Sec., U.P. Amateur Photographic Association, Lucknow University, Lucknow.) Entry forms obtainable also from the Editor of The Amateur Photographer. Tenth International Christmas Salon of Pictorial Photography (Antwerp). — Entries, November 15 ; open, December 20, 1936-January 3, 1937. (J. Van Dyck, Sec., Fotographische Kring ” Iris,” Ballaestr, 69, Antwerp.) Leicester and Leicestershire P.S. International Ex¬ hibition of Pictorial Photography. — Open, February 22-March 14, 1937. (H. Foscutt, 19, Doncaster Road, Leicester.) Edinburgh P.S. 75th Annual Open Exhibition. — Entries, March i ; open, March 20-April 3. (John S, Rodger, 16, Royal Terrace, Edinburgh.) Ilford P.S. International Exhibition. — Entries, January 30 ; open, March 1-6. (Exhibition Secre¬ taries, c/o 61, Castleton Road, Goodmayes, Essex.) FACTS and FORMULA ONE or more items of practical value to the amateur photographer are given under this heading in every issue. They are printed in either the vertical or horizontal form as shown here, and each is complete in itself. These facts and formuhe are intended to be cut out and pasted on the thin cards of the standard size, 5x3, supplied for card index cabinets. The collection when completed will form a concise guide to photographic practice that every regular worker will value for reference, and for that reason no copies should be missed. “ A.P.” filing cabinets have been specially prepared for this card index, and are now ready. The size of the box is 5^ x 3I x 3 and each is supplied complete with a set of alphabetical index cards and 150 cards for pasting on the “ Facts and F'ormulaj.” They are obtainable from our publishers, Messrs. Iliffe & Sons Ltd., Dorset House, Stamford Street, London, S.E.i. Price 2s. 6d., post free. 33. INTENSIFIERS 2.— Mercuric Chloride. Mercuric chloride . . 144 grs. . . 27.5 grm. Water .. .. 120Z. .. 1,000 c.c. The mercuric chloride should be dissolved in very hot water and the solution allowed to cool before use. It can be used repeatedly and will keep indefinitely. The negative, which can be treated immediately after fixing and washing, or after a fifteen minutes’ soak if it has been already dried, is placed in the mercuric chloride solution and rocked until the image is thoroughly bleached. This will best be seen by examining the plate from the back. After bleaching, wash for a few minutes and immerse in the following bath for a minute, rinsed and followed by another similar immersion and washed for three minutes. Hydrochloric acid 30 min. .. 10 c.c. Water . . . . 12 oz. . . 1,000 c.c. The image, which should be of a very light cream colour, is now ready for blacken¬ ing in either of the following solutions : — 1. — Any non-staining alkaline developer such as M.Q., Amidol, etc. This gives sufficient intensification for most work, but for greater contrast the negative may be bleached and redeveloped several times until the desired contrast is obtained. 2. — Sodium sulphite, 10 per cent solution. Only a slight intensification is gained with this solution. If the contrast is insufficient, the negative may be rebleached and re¬ developed as in (i). The mercuric chloride solution should be kept in a poison bottle and marked accord¬ ingly. 34. TESTS FOR HYPO ^O ascertain whether the hypo has been completely eliminated from the emulsion of either negative or print, the following permanganate test is quite reliable for normal purposes. Dissolve to grains of potassium permanganate in 10 oz. of distilled water and keep this as a stock solution. For use, take a little of this stock solution and dilute it with plain water until it shows but a faint pink colour. Take the negative or print direct from the washing bath and allow a few drops of the water from one corner to drip into the diluted permanganate solution. If the pink colour changes to a greenish tint, there is still some hypo in the emulsion and washing must be continued until no discoloration takes place. Another reliable test, the classic method for this purpose, can be carried out, as follows. Powder a little domestic starch and boil it up gently in enough distilled water to make a tliin but slightly viscous solution. (It is important that distilled water only be used.) Dissolve a few flakes of metallic iodine in alcohol, and add a drop or two to the starch solution after it has become cool. The starch at once assumes a deep blue colour. To a few ounces of the wash water add a drop or so of the iodine-starch solution, and if hypo is present the blue colour will at once disappear. In some districts the water supply contains a certain proportion of impurities that would be sufficient to change the colour of the hypo tester without the addition of hypo, so it is advised to make first a test of the direct water supply by allowing a little of it to drip into the diluted testing solution. If no dis¬ coloration can be seen after a few minutes then the hypo tester can be used with confidence. 289 29