Photographers' Formulary Borax 50lbs

Photographers' Formulary Borax - 50 Lbs.

Photographers' Formulary Borax - 50 Lbs.

B&H # PHB50LB MFR # 10-0264 50LB
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Expected availability: 2-4 weeks

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  • 1Description

Borax which is also known as Sodium Borate, can be used as a component in some developer formulas.

Borax acts as an alkali (accelerator), this shortens developing time for practical purposes. Development will still take place in the absence of an alkali but it will take considerably longer.
Developing agents work more effectively in an alkaline environment hence the addition of an alkali in the developer formula substantially reduces the development time and the subsequent use of an acid stop bath halts development abruptly by neutralizing the alkali and producing an acid environment.
In 1988 the Dial (soap) Corporation bought the exclusive rights to make and sell such home pantry staples as 20-Mule-Team Borax all-purpose cleaner, Borateem stain remover and Boraxo powdered hand soap.
At the time the U.S. president is Ronald Reagan, fondly remembered as the host of "Death Valley Days" once sponsored on TV by Borax.
UPC: 675152264503
Table of Contents
  • 1Description
Synonyms Biborate of soda
Biborate of sodium
Borate of soda
Borate of sodium
Purified borax
Pyroborate of soda
Sodium biborate
Sodium borate
Sodium pyroborate
Sodium tetraborate
Tetraborate of soda
20 Mule Team Borax
Appearance Pure white crystalline powder
Uses As a mild alkali accelerator in fine-grain developers and those of low activity
In certain fixing baths
In some acid hardeners, especially those intended for prints that are to be dried through heated belt driers
In gold toning baths to render them alkaline and to increase the rate of deposition of gold
Chemical Formula Na2B4O7 . 10H2O
Notes Borax is available as borax, pentahydrate, but most commonly as borax, decahydrate, the form used in photographic formulas. The old term for decahydrate is crystalline. Borax, decahydrate, and 20 Mule Team Borax are one and the same.
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