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Photographers' Formulary Potassium Bromide (1 lb)

BH #PHPBLBX • MFR #10-0930 1LB
4 reviews
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Photographers' Formulary Potassium Bromide (1 lb)
Key Features
  • Helps to Prevent Fog During Development
  • Commonly Used as a Restrainer
  • Reduces Contrast, Provides a Warm Tone
This is 1 lb of Potassium Bromide from Photographers' Formulary. It is commonly used as a restrainer in developers, especially those containing hydroquinone, pyrocatechin, or pyrogallol, and helps to prevent fog during development. When used in paper developers, it also reduces contrast and provides a warming effect. Additionally, potassium bromide is used as an ingredient in intensifying and reducing toners, as well as a variety of other photographic solutions.
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Photographers' Formulary 10-0930 1LB Overview

This is 1 lb of Potassium Bromide from Photographers' Formulary. It is commonly used as a restrainer in developers, especially those containing hydroquinone, pyrocatechin, or pyrogallol, and helps to prevent fog during development. When used in paper developers, it also reduces contrast and provides a warming effect. Additionally, potassium bromide is used as an ingredient in intensifying and reducing toners, as well as a variety of other photographic solutions.

UPC: 675152930033

Photographers' Formulary 10-0930 1LB Specs

Synonyms
Bromide
Bromide of potash
Bromide of potassium
Bromide salt of potassium
Appearance
White, deliquescent, granular powder
Odorless
Uses
Fog preventer and restrainer in developing solutions
Ingredient in intensifying, reducing, toning, and many other photographic solutions
Chemical Formula
KBr
Notes
Potassium bromide is the most commonly used restrainer in developing formulas, especially those using hydroquinone, pyrocatechin, or pyrogallol. The addition of potassium bromide usually results in a reduction of contrast and can have a warming effect on image tone when used in paper developers
Weight
1 lb / 453.6 g
Packaging Info
Package Weight
1.15 lb
Box Dimensions (LxWxH)
4.9 x 3.1 x 3"

Photographers' Formulary 10-0930 1LB Reviews

Potassium Bromide

By Linda
Rated 5 out of 5
Date: 2022-05-12

It's what's I needed, when I needed it! B&H did it's usual great job getting me the chemistry I needed in a timely fashion!

Excellent value restrainer

By Matt Shirley
Rated 5 out of 5
Date: 2012-01-16

The crystals are quite variable in size, but if you have a mortal and pestle you can grind them for more accurate weighing. I'm using KBr as a restrainer in caffenol (instant coffee, ascorbic acid, and washing soda) with excellent results.

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