Kodak D-85

Solution A

Water at 125° F

500 ml

Sodium sulphite

36.5 g

Boric acid crystals

9.4 g

Hydroquinone

28 g

Potassium bromide

2 g

Water to make

1 litre

Solution B

Water at 90 ° F

500 ml

Sodium bisulphite*

11 g

Sodium sulphite

1 g

Paraformaldehyde

37.5 g

Water to make

1 litre

Mix solutions with good ventilation. Mix 4 parts A + 1 part B for use. 82.5 millilitres of acetone may be substituted for the paraformaldehyde.

Defender 15-D

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

Potassium carbonate

90 g

Potassium bromide

8.3 g

Sodium sulfite, desiccated

90 g

Add cold water to make

1 liter

Mix 1+1 for use.

Kodak D-9

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 very slowly to prevent the solution from boiling. Mix 1:1 for use.

Dupont LD-1

Water at 90° F (32° C)

500 cc

Sodium sulfite, desiccated

30 g

Paraformaldehyde

7.5 g

Potassium metabisulfite

2.5 g

Boric acid crystals

7.5 g

Hydroquinone

22.5 g

Potassium bromide

1.5 g

Cold water to make

1 liter

Use full strength at 68° F.  16.5 ml of acetone may be used in place of the paraformaldehyde.

Dupont LD-2

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.

Chemco Developer

Solution A

Water at 125° F (52° C)

500 ml

Hydroquinone

135 g

Potassium formaldehyde

110 g

Diethylene glycol

118 ml

Ethylenediamine

0.26 g

Potassium hydroxide (45%)

2.8 ml

Cold water to make

1 liter

Solution B

Water at 125° F (52° C)

750 ml

Sodium hydroxide

9.5 g

Potassium bromide

1.57 g

Potassium formaldehyde

63 g

Boric acid

13.5 g

Cold water to make

1 liter

Mix 1+1+4 parts water for use.

Ansco 79b

Solution 1

Water at 90° F (32° C)

750 ml

Sodium sulfite, desiccated

1 g

Paraformaldehyde

30 g

Potassium metabisulfite

10.5 g

Cold water to make

1 liter

Solution 2

Water at 125° F (52° C)

750 ml

Sodium sulfite, desiccated

120 g

Boric acid crystals

30 g

Hydroquinone

90 g

Potassium bromide

6 g

Cold water to make

3 liters

Mix 1+3 for use. 66 ml of acetone may be substituted  for the paraformaldehyde.

Ansco 70

Solution 1

Water at 125° F (52° C)

750 cc

Hydroquinone

25 g

Potassium metabisulfite

25 g

Potassium bromide

25 g

Cold water to make

1 liter

Solution 2

Cold water

1 liter

Sodium hydroxide*

36 g

  or Potassium hydroxide*

50 g

Mix equal parts of solutions 1 and 2 immediately before use.
* Cold water should always be used when dissolving sodium or potassium hydroxide because considerable heat is involved.  If hot water is used, the solution will boil with violence and may cause serious burns.

Ansco 81

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.