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Photographers' Formulary P-Phenylenediamine - 1 Lb.

Photographers' Formulary P-Phenylenediamine - 1 Lb.

B&H # PHPPLB MFR # 10-0890 1LB
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  • 1Description

p-Phenylenediamine is the classic superfine-grain film developer. However besides the cautions listed, it requires strong overexposure of the film and a very long developing time, often twenty minutes or more, and even than the contrast of the resulting negatives is rather low.

As a result there have been efforts to replace p-phenylenediamine with other agents. One of the more successful is Windisch Superfine-Grain Developer that uses o-Phenylenediamine. This agent also has weak developing properties, but works as a good solvent for silver halide.

UPC: 675152890030
Table of Contents
  • 1Description
Synonyms Para-phenyelenediamene
Para-diaminobenzene
1,4-diaminobenzene
P-aminoaniline
4-aminoaniline
Ursol D
P-benzenediamine
1,4-benzenediamine
C.I. oxidation base 10
Developer 13
Durafur black R
Fouramine D
Fur black R
Fur yellow
Para
Ppd
Renal pf
Tertral D
PPD
Numerous other non-systematic names
Appearance White to slightly reddish crystals in photogrades
Uses Very low energy developer; produces negatives of minimum graininess. Often used in combination with glycin and/or metol.
Chemical Formula C6H8N2
Notes Cautions: Toxic and stains hands, clothing, and other things on prolonged contact. The free base of Para-phenyelenediamene and its water soluble salts may cause eczema or other skin irritations. Always wear a good dust mask when working with the powder and gloves when working with the powder or solutions.
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