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Formule per chimici fotografici fai da te

VANDIUM PRINT TONER

Vanadium alone produces deep-yellow to orange colored images but when combined with an iron salt such as ferric oxalate the yellow image of the vanadium ferrocyanide and the flue image of the ferri-ferrocyanide form a brilliant green This is a most unusual and difficult to use toner It is the only toner that produces a true bright green When it works it looks beautiful Unfortunately a great deal of trail and error is required to get it to work [Prosegue]

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MODIFIED WINDISCH FILM DEVELOPER

This formula was suggested to us by Mr William Troop who in experiments with Windisch Pyrocatechin developer reversed the proportions of sodium sulfite and catechol (pyrocatechin) The resulting super compensating developer works well with Kodak Technical Pan Film and yields negatives that can record a range of 7-10 stops For use with this developer Technical Pan film should be exposed somewhere between 32-64 ASA Catechol Pyrocatechin is a tanning developer stains (actually fogs) the negative and also hardens the emulsion protecting it from reticulation The negatives however have a brown color and look dark even at the edges This is the normal appearance of negatives developed in catechol Modified Windisch Film Developer was formulated for use on Technical Pan Film and it may not be satisfactory with other films If you wish to use this developer on films other than Technical Pan we recommend that you first test it with scrap film [Prosegue]

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ANSCO 130 ADAMS VERSION (PRINT)

This is Ansel Adams variation on Ansco 130 The Hydroquinone and the bromide is omitted and the sulfite reduced to 35 grams per liter Potassium Bromide is added as needed to prevent fog This adjustment to Ansco 130 gives beautiful print color If contrast is found to be too low Hydroquinone solution may be added as required cooling the image tone This is a very soft working developer using metol only and it gives good print color In effect it is quite similar to Kodak Selectol-Soft developer It is usually diluted 1:2 or more with 1189 to 3 minute developing times It may be used full-strength Developer 130 produces a strighter line than either Dektol or LPD [Prosegue]

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MAXIM MUIR’S COMPENSATING FORMULA (FILM)

 Stock Solution A Water 250 ml Sodium metabisulfite 10 g Pyrocatechin 40 g Water to make 500 ml Stock Solution B Sodium hydroxide 10 g Cold water to make 100 ml  For use, mix 2 parts A, 1 part B, and 200 parts water. Solution B does not ... [Prosegue]

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ANSCO 81 (LITH)

 Water at 125° F (52° C) 750 cc Hydroquinone 35 g Sodium sulfite, desiccated 55 g Sodium carbonate, monohydrated 80 g Citric acid 5.5 g Potassium bromide 10 g Cold water to make 1 liter  Do not dilute for use.

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DUPONT LD-2 (LITH)

 Water at 90° F (32° C) 500 cc Sodium sulfite, desiccated 30 g Hydroquinone 26 g Sodium carbonate, monohydrate 60 g Potassium metabisulfite 10 g Potassium bromide 4 g Cold water to make 1 liter  Use full strength at 68° F.

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KODAK D-9 (LITH)

 Solution A Water at 125° F (52° C) 500 ml Sodium bisulfite 22.5 g Hydroquinone 22.5 g Potassium bromide 22.5 g Cold water to make 1 liter Solution B Cold water 1 liter Sodium hydroxide 52.5 g  Add the hydroxide to the cold water v... [Prosegue]

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DEFENDER 15-D (LITH)

 Solution A Water at 125° F (52° C) 500 cc Hydroquinone 45 g Sodium sulfite, desiccated 30 g Sulfuric acid, concentrated 4 cc Cold water to make 1 liter Solution B Water at 125° F (52° C) 500 cc Sodium carbonate, desiccated 30 g Potassiu... [Prosegue]

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