Photographers' Formulary Ascorbic Acid - 1 Lb.

Photographers' Formulary Ascorbic Acid - 1 Lb.

Photographers' Formulary Ascorbic Acid - 1 Lb.

B&H # PHAALB MFR # 10-0241 1LB
Photographers' Formulary Ascorbic Acid - 1 Lb.

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Photographers' Formulary 10-0241 1LB overview

  • 1Description

Ascorbic Acid is an organic acid with antioxidant properties. The L-enantiomer of ascorbic acid is commonly known as vitamin C.

In 1937 the Nobel Prize for chemistry was awarded to Walter Haworth for his work in determining the structure of ascorbic acid, (It was shared with Paul Karrer, who received his award for work on vitamins), and the prize for Physiology or medicine that year went to Albert Szent-Gyorgyi for his studies of the biological functions of ascorbic acid.

Ascorbic acid is easily oxidized and so is used as a reductant in photographic developer solutions (among others) and as a preservative.

Exposure to oxygen, metals, light and heat destroy ascorbic acid, so it must be stored in dark and cold and not in a metal containment.

UPC: 675152241030
Table of Contents
  • 1Description

Photographers' Formulary 10-0241 1LB specs

Synonyms L-Ascorbic acid
3-oxo-L-gulofuranolactone (enol form)
Vitamin C
Appearance White crystals
Uses As a developing agent, and as a preservative
Chemical Formula C6H8O6
Notes As a developing agent it acts more vigorously at higher alkalinities. It is slow to get started but gives images with low fog. At low alkalinities, in combination with metol or Phenidone, ascorbic acid is an active, long-lasting developing agent.
Packaging Info
Package Weight 1.1 lb
Box Dimensions (LxWxH) 4.8 x 3.1 x 3.0"

Photographers' Formulary 10-0241 1LB reviews

Ascorbic Acid - 1 Lb. is rated 5.0 out of 5 by 1.
Rated 5 out of 5 by from Works Well For Caffenol CL As this is a technical grade chemical (vs. USP), I was worried that the purity would not suffice for the critical requirements of a developer. I bought it anyways and it gives wonderfully consistent results to my developing. I am using the Caffenol CL recipe with Ilford Delta 100 roll film. For me and my equipment, I give 40 minutes, semi-stand development and shoot at ISO 125. The suggested 70 minutes will give you a two-stop (or greater) push and lead to results that are difficult to obtain a decent scan from.
Date published: 2014-12-18
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