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User Manual for Photographers' Formulary Phenidone - 1 Lb. Click to enlarge the picture
Contents of the user manual for the Photographers' Formulary Phenidone - 1 Lb.
- 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 Phenidone - 1 Lb. 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 Phenidone is used as a low toxic common photography developer. It is sparingly soluble in cold water and moderately in hot, and can require temperatures of 175°F/80°C to dissolve. Phenidone can be substituted for metol. There is evidence that as a substitute for metol it causes true increase in film speed. However, Phenidone should not be used as a substitute in developers in which metol is the sole developing agent, such as Kodak D-23 and D-25. Try substituting approximately 10% of the amount of Phenidone for the amount of metol required. - Readily soluble in both aqueous acids and alkalies, including solutions of alkali bisulfites and carbonates, so that it can easily be incorporated into a developer solution.
- Used alone in sodium carbonate/sulfite solutions, it is very fast but extremely soft working and is only capable of producing negatives of low contrast. In combination with hydroquinone it produces developers with super-additivity that are even more efficient then MQ developers.
- Phenidone-based developers keep better then those based on metol the reason for that is that the oxidation product of phenidone is more efficiently regenerated by hydroquinone than is metol.
- Additionally, while the first oxidation product of hydroquinone, monosulphonate, forms an almost inert system with metol, it has a super-additive effect with phenidone, increasing developing powder.
- Because very small amounts of Phenidone are required, it is often desirable to use a percentage solution. a concentrate of Phenidone, containing a preservative, can be made as follows:
| Water(125°F/52°C) | 24 oz | 750 ml | | Sodium bisulfite | 90 grains | 6 grams | | Phenidone | 30 grains | 2 grames | | Cold water to make | 32 oz | 1 liter |
- For use, 100 ml of concentrate contains 0.2 grams of Phenidone. The preservative will have no appreciable effect on any developing formula.
Alternately, a 5% concentration can be made using methyl hydrate instead of water, but it does not keep. Use immediately. UPC: 675152870032 Table of Contents
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Technical parametersPhotographers' Formulary 10-0870 1LB Specs | Synonyms | 1-Phenyl-3-pyrazolidone
Graphidone
Fenidon
Fotodone (Mallinckrodt)
1-Phenyl-3-oxopyrazolidine
1-Phenylpyrazolid-3-one
2-Pyrazolin-3-ol, 1-phenyl-
1-P-3-P
Phenidone
1-Phenyl-3-pyrazolidinone
| | Appearance | White or slightly yellow powder
Colorless crystals | | Uses | As a hypoallergenic developing agent (This means that it is unlikely to cause dermatitis) That can be substituted for metol. Sufferers of metol poisoning can often use Penidone-based developers without ill effects. | | Chemical Formula | C9H10N2O | | Notes | Low toxic common photography developer due to strong reduction property of silver halides to black metallic silver which forms visible image. | | | | Package Weight | 1.05 lb | | Box Dimensions (LxWxH) | 6.7 x 3.7 x 3.6" |
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