Photographers' Formulary PyroCat-HD Film Developer - Makes 50 Liter  (13.2 gal)

Photographers' Formulary PyroCat-HD Film Developer (Liquid) - Makes 50 Liter (13.2 gal)

Photographers' Formulary PyroCat-HD Film Developer (Liquid) - Makes 50 Liter (13.2 gal)

B&H # PHPHDGD50L MFR # 01-5093
Photographers' Formulary PyroCat-HD Film Developer - Makes 50 Liter  (13.2 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: 675152150936
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Photographers' Formulary PyroCat-HD Film Developer (Liquid) - Makes 50 Liter (13.2 gal)
  • 3 lb
  • Table of Contents
    • 1Description
    Chemistry Type Film Developer
    Powder/Liquid Liquid
    Liquid Volume Not Specified by Manufacturer
    Packaging Info
    Package Weight 3.05 lb
    Box Dimensions (LxWxH) 7.7 x 4.9 x 2.5"
    PyroCat-HD Film Developer - Makes 50 Liter (13.2 gal) is rated 5.0 out of 5 by 2.
    Rated 5 out of 5 by from Pyro developing for ss film hangers As a long time fan of Gordon Hutchings PMK but not of tray developing, I decided to try this formula which emphasizes ease of use and ability to use standard hangers (PMK creates developing marks when used with them). Although PMK is less expensive by volume, I can develop 4 8x10s at a time in one gallon (8 if I load back to back) with much less anxiety over scratch marks plus the ability to develop plus and minus in the same batch.
    Date published: 2012-05-24
    Rated 5 out of 5 by from One of the best Pyro developers I use it with Acros and 400TX/TMY 120 for amazingly sharp and gorgeous negatives. Lasts forever and easy to mix with distilled water. Use it at 3.5:3:500ml with extreme semi-stand (4 agitations). I have also used it as a two bath developer with equally great results. It is not fussy and when you expose properly, you will get a negative with beautiful gradation.
    Date published: 2012-11-26
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