Corrected WD2H+ Formula

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sanchell
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Corrected WD2H+ Formula

Post by sanchell »

Here is the correct Solution A for WDH2+



WD2H+ (2003)

(John Wimberley)



SOLUTION A

Distilled water, 750.0 ml

*Benzotriazole, 0.2 g

Metol, 6.0 g

Sodium Bisulfite, 20.0g

Pyrogallol, 60.0 g

EDTA tetrasodium salt, 5.0 g

Distilled water to make 1.0 liter



SOLUTION B

Distilled water, 750.0 ml

Sodium carbonate, monohydrate, 110.0 g

Distilled water to make 1.0 liter



*For more accurate measurement, prepare a 1% solution by dissolving 1.0 gram of Benzotriazole in 100.0 ml of distilled water. Use 20.0 ml in place of 0.2 grams dry chemical.



Working Dilution for Normal and Reduced Contrast



Distilled water, 1600.0 ml

Stock Solution A, 25.0 ml

Stock Solution B, 25.0 ml



-2 EI 32 Develop 7 minutes

N EI 64 Develop 9.5 minutes



Working Dilution for Increased Contrast

Distilled water, 1600.0 ml

Stock Solution A, 25.0 ml

Stock Solution B, 50.0 ml



+2 EI 84 Develop 6.5 minutes

+4 EI 100 Develop 12 minutes



Developing Times and ISO ratings are for Ilford FP4+, tray processed with continuous agitation at 68F/20C. These specifications should also apply with slight adjustment to other medium speed films. For slower films, the developing times will need to be reduced by about 10%. For faster films, developing times will need to be increased by about the same amount.
Do it in the Dark,



Steve Anchell
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