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User Manual for Photographers' Formulary Catechol - 10 Grams Click to enlarge the picture
Contents of the user manual for the Photographers' Formulary Catechol - 10 Grams
- Product category: Alternative Process & Miscellaneous Chemistry Photographers' Formulary
- Brand: Photographers' Formulary
- Description and content of package
- Technical information and basic settings
- Frequently asked questions – FAQ
- Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
- Authorized service for Photographers' Formulary Alternative Process & Miscellaneous Chemistry
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User manual for the Photographers' Formulary Catechol - 10 Grams contain basic instructions
that need to be followed during installation and operation.
Before starting your appliance, the user manual should be read through carefully.
Follow all the safety instructions and warnings, and be guided by the given recommendations.
User manual is an integral part of any Photographers' Formulary product,
and if it is sold or transferred, they should be handed over jointly with the product.
Following the instructions for use is an essential prerequisite for protecting
health and property during use, as well as recognition of liability on the part of the manufacturer
for possible defects should you make a warranty claim. Download an official Photographers' Formulary user manual in which you will find instructions on how to install, use, maintain and service your product.
And do not forget – unsuitable use of a Photographers' Formulary product will considerably shorten its lifespan!
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Product description Catechol Pyrocatechin, also known as Pyrocatechin and Pyrocatechol, is used as a developing agent for film or paper. It gives warm black images, with rapid development and high contrast. Pyrocatechin also acts as a tanning developer, which stains (actually fogs) the negative and also hardens the emulsion protecting it from reticulation. - Pyrocatechin is easily soluble in warm water. It is chemically akin to hydroquinone but with special properties, notably the fact that it oxidizes readily and its oxidation products have a tanning effect on the gelatin
- When used without sulfite, or a very low sulfite content, it gives a heavily stained image and tans the gelatin in proportion to the density of the image.
- This property has led to its use for high-definition and tanning developers (Windisch Extreme Compensating Developer). Used with caustic alkali it is one of the best compensating developers (Maxim Muir's Pyrocatechin Compensating Developer).
UPC: 675152340016 Table of Contents
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Technical parametersPhotographers' Formulary 10-0340 10G Specs | Synonyms | Pyrocatechin
Catechol
Pyrocatechol
Ortho-Dihydroxybenzine | | Appearance | Colorless crystalline needles or scales | | Uses | Developing agent for black & white film or paper, gives warm black images
With caustic soda, it gives rapid development with high contrast. | | Chemical Formula | C6H4(OH)2
1,2-Dihydroxybenzene
Ortho-Dihydroxybenzene | | Notes | All developers containing pyrocatechin should be mixed with distilled water, whether or not the formula calls for it. Pyrocatechin is poisonous and should be handled with care, use protective gloves, a respirator, and amble ventilation. |
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