Reveladores a granel

por Domingo A. Siliceo

El mundo está lleno de reveladores. En serio. Si alguna vez pensaste que más allá de tu botella de HC-110 o Rodinal sólo existía el salvaje D-76… estabas en un gran error.

Pero no sientas apuro: no es un error grave. De hecho, y según cómo se mire, no conviene hacerse la pregunta de «con qué más podrías revelar tu negativo» porque la respuesta puede ser el inicio de una tortuosa, larga y a menudo infructuosa búsqueda casi sin fin que te va a llevar a descubrir una verdad peligrosa para la consecución de resultados predecibles: el mundo está lleno de reveladores.

La historia nos suele contar que en un primer momento todos hemos confiado en los reveladores comerciales: HC-110, Rodinal, D-76, Xtol o Tmax developer, por citar los quizás más nombrados. Luego hemos pensado que algún revelador de autor, como los de Gago o los de Moersch, los de Barry Thornton o de Willi Beutler, podría dar un toque único y distinto a nuestras fotografías, algo que permitiera diferenciarnos de los demás. Siempre curiosos, aún hemos ido un paso más allá y hemos buscado fórmulas de reveladores antiguos, medio olvidados, nos hemos sentido casi alquimistas y nos hemos convencido que detrás de las fenomenales imágenes de Edward Weston o de William Mortensen el revelador ha jugado un papel insustituible y definitivo.

En mi opinión, buscar un revelador que se ajuste a nuestra manera de entender las imágenes es algo bueno para nuestro crecimiento como artesanos o como artistas. Buscar, encontrar y trabajar y comprender ese revelador ayudará a que nuestras fotografías puedan tener un sello especial que las diferencie de muchas otras fotografías.

Pero no os ceguéis pensando que el revelador va a compensar un fallo vuestro a la hora de exponer, no. El revelador puede jugar muy bien su limitado papel, pero la magia la crea el fotógrafo mezclando en el matraz que es el negativo los factores que determinan un buen cliché, y si la relación entre estos factores no está equilibrada el peor de ellos determinará la calidad final.

Para terminar —y por si finalmente no me hacéis caso y decidís probar—, os dejo el trabajo de Paul Fitzerald al recopilar unas pocas fórmulas de reveladores hoy en desuso. Este trabajo puede asimilar un caserón decrépito y abandonado, lleno de muebles de olor denso, poca y turbia luz, sonido seco y telas blancas y polvorientas de misteriosas formas. Pero los fantasmas de este caserón están muy vivos…

 
 

These formulas are given for ‘Historical reference ONLY’. Some of the formulas contain chemicals that are noxious, toxic, or just plain dangerous to handle. KNOW what you are doing first or learn about chemical handling BEFORE you start using these.

Misc. Film Developers
Burki’s Pyro

Standard Glycin

SD-19 Hot Shot DeFero’s DK-20X
Sease #3 Fine Grain Edwal #12
Defender ND-3 777
Defender D-6 King’s All-in-One
Metol/Pyro Staining
Kodak Film Developers
D-1 pyro

SD-1 Pyro

D-7 pyro

D-8 high

D-11 high

DK-15 tropical

D-19 high

DK-20

D-23 soft

D-25 fine

D-32 warm-tone

DK-50

D-51 Amidol

DK-60a

D-61

D-72

D-76

D-82 extreme

D-84 pyro

D-85 lith

D-89 DK-93
D-96
Agfa Film Developers
Ansco 12 Fine grain
Agfa17 borax

Agfa17M metaborate

Agfa20 Agfa22
Agfa30 X-ray Agfa40
Agfa42 Agfa45 Pyro
Agfa47 Agfa48M metaborate
Agfa61 Agfa64 tropical
Agfa70 high Agfa72 glycin
Agfa73 extreme Agfa79 lith
Agfa81 lith Agfa90 high

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Burki’s Pyro Developer

Reported to be a fast acting, very fine grain, compensating developer.
A fast acting, COMPENSATING pyro developer, interesting.

Stock Solution A
Pyro 60g
Potassium metabisulfite 60g
Water 1.0L
Stock Solution B
Trisodium Phosphate 100g
Water 3.0L

Mix 1 part A with 9 parts B
6 min.@65°F (18°C). Use one-shot.
((the T.S.P. I found at the hardware stores is mixed with ‘Sodium Meta-silicate’, I have no idea if this will work out.))


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Standard Glycin Developer

Water (125°F) 750ml
Sodium Sulfite 125g
Glycin 50g
Sodium Carbonate(mono) 125g
Cold water to make 1.0L

Suggested: tray=1 part stock – 4 parts water = 5 -10 min @68°F; tank=1 part stock – 15 parts water = 20 – 25 min @68°


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Paraphenylene Fine Grain

777 Defender ND-3 Edwal #12 Sease #3
Water (125°F) 750ml 750ml 750ml 750ml
Metol 7.0g 6.0g
Sodium sulfite 70.0g 90.0g 90.0g 90.0g
Paraphenylene-diamine 7.0g 10.0g 10.0g 10.0g
Glycin 7.0g 2.0g 5.0g 6.0g
Water to make 1.0L 1.0L 1.0L 1.0L

Suggested 12 to 25 min.@68°F
“Films to be developed in this solution should be given twice the exposure usually given when alkali-containing developers are to be used. This developer keeps well.”
“This formula has been found to give excellent results with all makes of film. Grainless enlargements up to 20 diameters are consistently obtained from negatives developed in it and in the hands of a skilled photographer, good enlargements up to 50 diameters are possible.”

((Greatest thing since sliced bread, too bad it’s TOXIC, use at your own risk.))


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Defender D-6

Water (125°F) 96 oz.
Metol 115 grains
Sodium sulfite 13 oz.
Hydroquinone 300 grains
Borax(crystals) 115 grains
Water to make 1 gal

Suggested: Time / temp same as D-76, looks to be the same formula.


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King’s All-in-One

Water 1.0L
Metol 1.0g
Sodium Sulfite 40.0g
Hydroquinone 5.0g
Sodium Carbonate 30.0g
Potassium Bromide 2.0g
Potassium Iodide 2.0g
Hypo 13.0g

This is a developer/fixer in one solution. The pH should be 8.5; the ratio of potassium iodide to hypo is critical; it does not reach full emulsion speed. No time / temp is given, I guess 15 min.@68°F is a start. This was patented in 1946 (U.S.P. 2,397,006)


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Metol/Pyro Staining Developer

Part A
Metol 3.9g
Potassium Metabisulfite 4.4g
Pyro 4.4g
Potassium Bromide 1.6g
Water to make 1.0L
Part B
Sodium Carbonate(mono) 108g
Water to make 1.0L

Mix 1 part A with 1 part B, use one-shot.
Suggested : 6 min.@68°F.


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A.B.C. Pyro Kodak D-1

Stock Solution A
Sodium bisulfite 9.8g
Pyro 60.0g
Potassium Bromide 2g
Water to make 1.0L
Stock Solution B
Water 1.0L
Sodium sulfite 105g
Stock Solution C
Water 1.oL
Sodium Carbonate 75g

This is to be used ‘one-shot’ and combined just before use.
To use, mix 1 part A, B, C, with 7 parts water.
Suggested 5-7 min @65°


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Kodak Pyro-Stain Developer SD-1

Water (125°F) 500ml
Sodium Sulfite 1.4g
Pyro 2.8
Sodium Carbonate 5.3
Water to make 1.0L

Suggested : 6 min. @68°F in shallow tray, water rinse, and fix in plain hypo.


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(Metol) Elon – Pyro Kodak Developer D-7

((It appears that D-7 was THE choice for Tri-X, full speed, full range, and fine grain.))

Stock Solution A
Water (125°F) 500ml
Elon (metol) 7.5.g
Sodium Bisulfite 7.5g
Pyro 30.0g
Potassium Bromide 4.2g
Water to make 1.0L
Stock Solution B
Water 1.0L
Sodium Sulfite 150.0g
Stock Solution C
Water 1.0L
Sodium Carbonate 75.0g

Dissolve in order given.

Suggested:
Tray = 1 part A, B, C & 8 parts water
7 min. @ 68°F
Tank = 1 part A, B, C & 13 parts water
10 min. @ 68°F


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Very High Contrast Developer Kodak D-8

Water (90°F) 750ml
Sodium Sulfite 90.0g
Hydroquinone 45.0g
Sodium Hydroxide 37.5g
Potassium Bromide 30.0g
Water to make 1.0L

Dissolve in order given. Stir thoroughly before use.

Suggested: 2 parts stock solution – 1 part water 2 min. @68°F

“For general use, a developer which is slightly less alkaline and gives almost as much density can be obtained by using 410 grains of sodium hydroxide per 32oz of stock solution (28g per liter) instead of the quantity given in this formula.”


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High Contrast Developer Kodak D-11

Water (125°F) 500ml
Metol 1.0g
Sodium sulfite 75g
Hydroquinone 9g
Sodium Carbonate 25g
Potassium Bromide 5.0g
Cold water to make 1.0L

Dissolve chemicals in order given.
Use full strength for high contrast, dilute 1 – 1 for continuous tone copies.
Suggested 5 min @68°F


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Tropical Developer DK-15

Water (125°F) 750ml
Elon (metol) 5.7g
Sodium Sulfite 90.0g
Kodalk 22.5g
Potassium Bromide 1.9g
Sodium Sulfate 45.0g
Cold water to make 1.0L

Dissolve in order given. Use full strength.

Suggested:
10 min.@68°F
2 – 3 min.@90°F

Under 75° you can omit the sulfate to speed up development.
6 min.@68°F

“A developer which gives less contrast than Kodak DK-15 can be obtained by reducing the quantity of Kodalk in DK-15 to 73 grains per 32oz of developer (5g per liter). Development times are the same.”


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High Contrast Kodak D-19

Water(125°F) 500ml
Elon(metol) 2.2g
Sodium Sulfite 96.0g
Hydroquinone 8.8g
Sodium Carbonate 48.0g
Potassium Bromide 5.0g
Cold water to make 1.0L

Dissolve in order given.
Suggested : 5 min.@68°F


Kodak SD-19-A additive

((This would have been for ‘Johnny on the spot’,’F/8 and be there’ press photographers. They expected a 4X speed increase with the additive.))

0.2% solution of
(6-nitro-benzimidazole nitrate) 20.0g
hydrazine dihydrochloride 1.6g
Water to make 1.0L

Dissolve in order given.
To use, add 1oz SD-19-A to 32oz of D-19.

“The best speed increase is obtained by developing for the time required to give a fog value around 0.40.” Between 12 – 20 min.@68°F

To prepare a 0.2% solution of 6-nitro-benzimidazole nitrate, dissolve 30gr in 32oz (2g -1.0L) of hot distilled water.”

‘6-nitro-benzimidazole nitrate’ was available as ‘Kodak Anti-Fog #2’
‘hydrazine dihydrochloride’ was available as ‘Eastman Organic Chemical #1117’


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Kodak Developer DK-20

((This appears to be THE choice for Plus-X and SuperXX, as universal as D-76 with finer grain. Lowering the borax amount in DeFero’s formula would extend the development time
Try 10 min.@68°F to start. Will need to try this one out!!!))

DeFero’s DK-20x DK-20 DK-20R
Water (125°F) 750ml 750ml 750ml
Elon (Metol) 5.0g 5.0g 7.5g
Sodium Sulfite 100.0g 100.0g 100.0g
Borax 0.67g
Kodalk 2.0g 20.0
Sodium Thiocyanate 1.0g 1.0g 5.0g
Potassium Bromide 0.5g 0.5g 1.0
Cold water to make 1.0L 1.0L 1.0L

Dissolve in order given.
Suggested: Same time and temp. as D-76.
Replenish at a rate of 3/4oz per roll developed (80 Sq. In.).

“De Fero has reported that in the Kodak DK-20 formula, the substitution of the Kodalk by 1/3 of it’s weight of borax greatly improves the fine grain and keeping properties of the solution.”

“If a two-bath formula for divided development is desired, the solution is made up as above but omitting the borax. The film is treated 4 min. in this bath, then, without intermediate washing, it is held 4 – 6 min. in a solution of 5 grams of borax in 1,000cc of water. Divided development of this kind has the advantage that the developer does not become exhausted nearly as rapidly as the single solution types, assuming that the alkaline second bath is renewed frequently.”


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Low Contrast Developer Kodak D-23
Fine Grain Developer Kodak DK-25

D-23 DK-25 DK-25R
Water (125°F) 750ml 750ml 750ml
Elon (metol) 7.5g 7.5g 10.0g
Sodium Sulfite 100.0g 100.0g 100.0g
Sodium Bisulfite(Kodalk)

15.0g 20.0g
Cold water to make 1.0L 1.0L 1.0L

Dissolve in order given.
Suggested-23 15 – 19 min.@68°F
SuggestedK-25 35 min.@68°F }}-{{ 18 min.@77°F
Replenish at 1oz. per roll for the first 50 rolls; 3/4oz. per roll for the second 50 rolls then discard and replace.


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Warm-Tone Lantern Slides Kodak D-32

Stock Solution A
Water (125°F) 500ml
Sodium Sulfite 6.3g
Hydroquinone 7.0g
Potassium Bromide 3.5g
Citric Acid 0.7g
Cold water to make 1.0L
Stock Solution B
Cold water 1.0L
Sodium Carbonate 30.0g
Sodium Hydroxide 4.2g

Dissolve in order given.

To use: 1 part A – 1 part B : 5 min.@68°F
For still warmer tone use 1 part A – 2 parts B
((This looks like it would work as a warm-tone paper developer))


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Commercial Developer Kodak DK – 50

DK-50 DK-50R
Water (125°) 500ml 750ml
Elon (metol) 2.5g 5.0g
Sodium Sulfite 30.0g 30.0g
Hydroquinone 2.5g 10.0g
Kodalk 10.0g 40.0g
Potassium Bromide 0.5g
Water to make 1.0L 1.0L

Dissolve in order given.

Suggested: 4 – 6 min.@68°F in trays
8 min.@68°F in tanks
8 min.@68°F in tanks at 1 -1 for portraits
Replenish at a rate of 3/4oz per roll developed (80 Sq. In.).


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Kodak Amidol Developer D-51

Water (125°) 750ml
Sodium Sulfite 24.0g
Cold water to make 1.0L
Amidol
(Diaminophenol hydrochloride) 7.5

No time/temp suggestion was made, this was part of a bleach & redevelopment stain removal process. It is a non-staining developer.


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Commercial Developer Kodak DK – 60a

DK-60a DK-60TR
Water (125°F) 750ml 750ml
Elon (metol) 2.5g 5.0g
Sodium Sulfite 50.0g 50.0g
Hydroquinone 2.5g 10.0g
Kodalk 20.0g 40.0g
Potassium Bromide 0.5g
Water to make 1.0L 1.0L

Dissolve in order given.
Suggested: deep tank = 7 min.@68°F
Replenish at 3/4oz. per roll developed (80sq. In.) approx. 8 gal per 1000 rolls.


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Developer Kodak D-61A

D-61A D-61R
Solution A
Water (125°F) 500ml 3.0L
Elon (metol) 3.1g 5.0g
Sodium Sulfite 90.0g 180.0g
Sodium Bisulfite 2.1g 3.8g
Hydroquinone 5.9g 11.9g
Sodium Carbonate 11.5g
Potassium Bromide 1.7g 3.1g
Cold water to make 1.0L 6.0L
Solution B
Sodium Carbonate 240.0g
Water to make 2.0L

Dissolve in order given.
tray: mix 1 – 1 with water; 6 min. @68°F
tank: mix 1 – 3 with water; 12 min.@68°F

Replenisher = mix 3 parts A and 1 part B and add as needed. Do not mix until ready to use.


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Paper, Film & Plate Developer Kodak D-72

Water (125°F) 500ml
Elon (metol) 3.1g
Sodium Sulfite 45.0g
Hydroquinone 12.0g
Sodium Carbonate 67.5g
Potassium Bromide 1.9g
Cold water to make 1.0L

Dissolve in order given.
See materials for dilution and times.


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Normal Contrast Developer Kodak D-76

D-76 D-76R D-76b D-76d D-76dr D-76h D-76x D-103
Water (125°F) 750ml 750ml 750ml 750ml 750ml 750ml 750ml 750ml
Metol 2.0g 3.0g 2.75g 2.0g 2.2g 2.5g 2.0g 2.0g
Hydroquinone 5.0g 7.5g 2.75g 5.0g 5.4g 5.0 5.0g
Sodium Sulfite 100g 100g 100g 100g 100g 100g 100g 100g
Borax 2.0g 20.0g 2.5g 8.0g 10.0g 2.0g 2.0g 1.0g
Boric acid 8.0g 6.7g 15.0g 15.0g
Potassium Bromide 0.125g
Water to make 1.0L 1.0L 1.0L 1.0L 1.0L 1.0L 1.0L 1.0L

Dissolve in order given.
See materials for dilution and times.
D-76 is the original, D-76R is the replenisher, D-76 b,d,h,x are buffered versions.D-76dr is the replenisher for D-76d.
((You can also add 0.5g potassium bromide to reduce base fog and improve shadow detail.))


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Extreme Underexposure Developer Kodak D-82

Water (125°F) 750ml
Wood Alcohol 48.0ml
Elon (metol) 14.0g
Sodium Sulfite 52.5g
Hydroquinone 14.0g
Sodium Hydroxide 8.8g
Potassium Bromide 8.8g
Cold water to make 1.0L

Dissolve in order given.

Suggested: 5 min. @68°F

“The prepared developer does not kept more than a few days in a full stopped bottle or about 2 hours in an open tray.”


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Non-Staining Pyro Developer Kodak D-84

Stock Solution A
Water 750ml
Sodium sulfite 180g
Pyro 30g
Water to make 1.0L
Stock Solution B
Sodium Carbonate 120g
Potassium Bromide 3.8g
Water to make 1.0L

Dissolve chemicals in order given.
To use mix 1 part A, 1 part B, and 4 parts water.
Suggested 5-6 min @ 65°F.


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Kodalith films, plates and paper Kodak D-85

Water (90°F) 500ml
Sodium Sulfite 30.0g
Paraformaldehyde 7.5g
Sodium Bisulfite 2.2g
Boric acid crystals 7.5g
Hydroquinone 22.5g
Potassium Bromide 1.6g
Cold water to make 1.0L

Use crystalline boric acid, powdered is NOT suggested.

“Mixing directions:
Use a 1 gallon narrow mouthed bottle for mixing the developer. First check the volume of the bottle and mark it to indicate the exact level of 1 gallon of solution. Fill the bottle half full of water at about 90°F and dissolve the chemicals in the order given. After adding each chemical, place the stopper in the bottle so that only a small quantity of air is present during agitation. When all the chemicals have been dissolved, add cold water until the solution comes up to the 1 gallon mark. Insert the stopper tightly to exclude as much air as possible. Allow the developer to stand about 2 hours after mixing. Cool to 68°F before use. If only a portion of the contents of the bottle is used at one time, it is suggested that the balance be saved by filling a bottle of smaller size which should then be stopped tightly.”

((Try Agfa 81 Lith developer.))


index


Kodak D-89

Metol 3.0g
Sodium Sulfite 100.0g
Borax 5.0g
Potassium Bromide 0.5g
Water to make 1.0L

((Found and copied from web, no time/temp given. Looks much like DK-25 fine grain.))


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Kodak “Kodelon” DK-93

Water(125°F) 500ml
Kodelon 5.0g
Sodium Sulfite 30.0g
Hydroquinone 2.5g
Kodalk 20.0g
Potassium Bromide 0.5g
Water to make 1.0L

Suggested:
film: 9 min. @68*F
plates: 6 min. @68*F
paper: 2 min. @ 68*F

“For warm tone papers, use without dilution and develop for 2 min.@68°F. For colder tones, double the quantity of Kodalk; use without dilution and develop 1 to 2 min.@68°F. In either case, the tones given with this developer are slightly warmer than the normal tones given with Kodak developers D-52 and D-72.

“The use of Kodak DK-93 is especially recommended for those persons subject to trouble from skin irritation.”


index


Kodak D-96

D-96 D-96R
Metol 1.5g 2.0g
Sodium Sulfite 75.0g 80.0g
Hydroquinone 1.5g 2.0g
Borax 4.5g 5.0g
Potassium bromide 0.4g
Water to make 1.0L 1.0L

((Found and copied from web, no time/temp given. Looks almost like DK-50, DK-60. Will need longer time then D-76. Will need to try this one out!!!))


index


Ansco 12 Fine grain

Water(125°F) 750ml
Metol 8.0g
Sodium sulfite 125.0g
Sodium Carbonate(mono) 5.75g
Potassium Bromide 2.5g
Water to make 1.0L

Suggested: 8 to 12 min.@65°F


index


Agfa 17 Fine grain borax

Agfa 17 Agfa 17A
Water(125°F) 750ml 750ml
Metol 1.5g 2.2g
Sodium Sulfite 80.0g 80.0g
Hydroquinone 3.0g 4.5g
Borax 3.0g 18.0g
Potassium Bromide 0.5g
Water to make 1.0L 1.0L

Suggested: 10 -15 min.@68°F

Add 1/2 to 3/4 oz. replenisher per roll, maintain original volume by discarding used developer. No change in time / temp.


index


Agfa 17M Fine Grain Metaborate

Agfa 17M Agfa 17MR
Water(125°F) 750ml 750ml
Metol 1.5g 2.2g
Sodium Sulfite 80.0g 80.0g
Hydroquinone 3.0g 4.5g
Sodium Metaborate 2.0g 8.0g
Potassium Bromide 0.5g
Water to make 1.0L 1.0L

Suggested: 10 -15 min.@68°F

Add 1/2 to 3/4 oz. replenisher per roll, maintain original volume by discarding used developer. No change in time / temp.


index


Agfa 20 M-Q Positive

Water(125°F) 750ml
Metol 2.0g
Sodium Sulfite 25.0g
Hydroquinone 4.0g
Sodium Carbonate(mono) 18.5g
Potassium Bromide 2.0g
Water to make 1.0L

Suggested: 3 to 4 min.@68°F


index


Agfa 22 M-Q High Contrast Positive

Water(125°F) 750ml
Metol 0.8g
Sodium Sulfite 40.0g
Hydroquinone 8.0g
Sodium Carbonate(mono) 50.0g
Potassium bromide 5.0g
Water to make 1.0L

Suggested: 5 to 8 min.@68°F


index


Agfa 30 X-Ray

Water(125°F) 750ml
Metol 3.5g
Sodium Sulfite 60.0g
Hydroquinone 9.0g
Sodium Carbonate(mono) 40.0g
Potassium bromide 2.0g
Water to make 1.0L

Suggested: 4 to 15 min.@68°F


index


Agfa 40 M-Q tray

Water(125°F) 900ml
Metol 4.5g
Sodium Sulfite 54.0g
Hydroquinone 7.5g
Sodium Carbonate(mono) 54.0g
Potassium bromide 3.0g
Water to make 1.0L

Suggested: dilute 1 part agfa 40 to 2 parts water.
4 to 5 min.@68°F

“This is a brilliant Metol-Hydroquinone tray developer for roll, pack and sheet film.”


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Agfa 42 M-Q Tank

Water(125°F) 750ml
Metol 0.8g
Sodium Sulfite 45.0g
Hydroquinone 1.2g
Sodium Carbonate(mono) 8.0g
Potassium Metabisulfite 4.0g
Potassium bromide 1.5g
Water to make 1.0L

Suggested: 15 to 20 min.@68°F

“This is a soft-working tank formula recommended for pack, roll and portrait films.”


index


Agfa 45 pyro

Solution 1
Sodium Bisulfphite 9.8g
Pyro 60.0g
Potassium Bromide 1.1g
water to make 1.0L
Solution 2
Sodium sulfite 105.0g
water to make 1.0L
Solution 3
Sodium Carbonate(mono) 85.0g
Water to make 1.0L

Suggested:
Tray: 1 part each 1,2,3 and 7 parts water; 6 to 8 min.@68°F
Tank: 1 part each 1,2,3 and 11 parts water; 9 to 12 min.@68°F

“Solutions will keep well when stored separately but final developer
should be used immediately after mixing.”


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Agfa 47 M-Q Developer

Agfa 47 Agfa 47A
Water(125°F) 750ml 750ml
Metol 1.5g 3.0g
Sodium sulfite 45g 45g
Sodium Bisulfite 1.0g 2.0g
Hydroquinone 3.0g 6.0g
Sodium Carbonate(mono) 6.0g 12.0g
Potassium Bromide 0.8g
Water to make 1.0L 1.0L

Suggested: full strength 5-7 min @ 65°F
1 – 1 = 12 – 16 min @ 65°F

“This is a long-life, clean-working formula which will give excellent
results as a standard film developer for either tray or tank
development.”

Suggested: add 1/2 to 3/4 oz. replenisher per roll, maintain original
volume by discarding used developer. No change in time / temp.


index


Agfa 48M Metaborate Developer

Agfa 48M Agfa 48MR
Water(125°F) 750ml 750ml
Metol 2.0g 6.3g
Sodium sulfite 40.0g 30.0g
Hydroquinone 1.5g 10.0g
Sodium Metaborate 10.0 40.0
Potassium Bromide 0.5g
Water to make 1.0L 1.0L

Suggested:
Tank: 5 to 7 min.@68°F
Tray: 4 to 6 min

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