Hardeners Kodak

Rinse thoroughly in clean cold water. Place in the toner until original detail returns—about 30 seconds. Give the print an immediate and thorough water rinse then immerse it for 2 to 5 minutes in a hardening bath composed of 1 part of hardener (Kodak F-5a Hardener) and 13 parts of water. Wash the prints for 4 minutes in running water at 65F/18C to 75F/24C. 

Photographic fixer. Kodak tropical acid hardening-fixing bath F5 or equivalent. 

When processing at high temperatures a mildly alkaline, buffered borax developer is recommended. Alkali-free developers of the amidol type or one of the mildly alkaline fine grain developers such as Kodak D-23 are preferable to those with normal alkali content. Additionally, a pre-hardening bath such as Kodak SB-4 Tropical Hardener Bath or a specially formulated tropical developer may be used. 

Stop Bath for Tropical Development Films should be immersed for three minutes in either Kodak SB-4 Tropical Hardener Bath or Kodak SB-5 Nonswelling Acid Rinse Bath after development and before fixation. Agitate the negative in the stop bath frequently. 

Because of pyro s self-hardening properties it is not necessary to use fixers containing hardener. If you wish to use an acid stop bath after the water rinse a good fixer to use is Kodak F-24 Nonhardening Acid Fixer. Otherwise, use plain running water and Photographers Formulary TF-4 Fixer (recommended). 

NOTE 1 When development is completed, rinse the film in water for 1 or 2 seconds only and then immerse in Kodak SB-4 Tropical Hardener Bath for 3 minutes (omit the water rinse if the film tends to soften). Then fix for at least 10 minutes in an acid-hardening fixing bath, such as Kodak F-5 Hardening Fixer, and wash for 10 minutes in water at not over 95F/35C. 

After toning, rinse the print for a few seconds in running water and place for about 1 minute in a sodium bisulfite solution containing 30.0 grams per liter of water. Then immerse the print for about 2 minutes in a hardening bath prepared by adding 2 parts of Kodak F-5a Hardener to 16 parts of water. 

To intensify negatives, first wash the negatives to be treated for 5 to 10 minutes. Harden them for 5 minutes in Kodak SH-1 Formalin Supplementary Hardener and wash them again for 5 minutes. 

Harden the film for 2 to 3 minutes in Kodak SH-1 Formalin Supplementary Hardener. After hardening, wash for 5 minutes. Bleach the negative for 3 to 4 minutes using equal parts A and B (the solutions should not be mixed until ready for immediate use, since they do not keep long after mixing). 

After development is complete rinse and fix in an acid-hardening fixing bath such as Kodak F-5.Wash and dry as usual. 

Rapid-fixer (Kodak without hardener), prepared according to manufacturer s instructions... 

Gelatin hardeners—photographic Ethylene United States 3,277,030 1966 Eastman Kodak... 

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