Photographers' Formulary PyroCat-HD Film Developer - Makes 10 Liter  (2.6 gal)

Photographers' Formulary PyroCat-HD Film Developer (Liquid) - Makes 10 Liter (2.6 gal)

Photographers' Formulary PyroCat-HD Film Developer (Liquid) - Makes 10 Liter (2.6 gal)

B&H # PHPHDFDL10L MFR # 01-5081
Photographers' Formulary PyroCat-HD Film Developer - Makes 10 Liter  (2.6 gal)

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  • 1Description

Photographer's Formulary PyroCat HD is a high acutance developer, formulated by Sandy King as an alternative to other pyrogallol-based staining developers.

The advantages over PMK that Mr. King cites for his formula include an approximately 1/3 stop greater effective film speed, 10-15% shorter development times, more consistent staining action, lower toxicity, and no streaking or mottling with reduced agitation.

Catechol (pyrocatechin) has a high vapor pressure and it is a phenol. The high vapor pressure means that solid catechol evaporates readily. When you open a bottle containing solid catechol, you can smell it. Always store solid catechol in a tightly capped glass container. When mixing a solution containing catechol, work in a ventilated area. When catechol is in solution, its high vapor pressure is not a problem.

UPC: 675152150813
In the Box
Photographers' Formulary PyroCat-HD Film Developer (Liquid) - Makes 10 Liter (2.6 gal)
  • 0.75 lb
  • Table of Contents
    • 1Description
    Synonyms Catechol (pyrocatechin)
    Appearance (Liquid)
    Uses Black and white film development
    Chemical Formula Not specified
    Notes The fact that catechol is a phenol means that it is corrosive and can cause skin burns. If you should spill a solution of catechol, wash the area (or skin) with soap and water. Use tongs or rubber gloves whenever possible when working with this compound or its solutions.
    Packaging Info
    Package Weight 0.7 lb
    Box Dimensions (LxWxH) 5.5 x 5.0 x 2.5"

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