from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A colorless crystalline compound, C6H3(NH2)2OH·2HCl, used as a photographic developer.
from the GNU version of the Collaborative International Dictionary of English
- n. A salt of a diamino phenol, C6H3(OH)(NH2)2, used as a developer.
from The Century Dictionary and Cyclopedia
- n. A trade-name for the hydrochlorid of diaminophenol, used as a developer in photography. Its formula is C6H3OH(NH2)2.2HCl. The free base is unstable.
We needed not only the essential bulk chemicals, such as amidol, metol, para-amidophenol, and glycine, but also certain rarer substances, such as the photographic sensitisers, which were so essential for the Air Force.
An excellent developer which must be used freshly mixed, and may be made up in a moment, is as follows: Take 1-1/2 ounces of a 25 per cent solution of sodium sulphite; dry amidol, 30 grains; 5 to 10 drops of a 10 per cent solution of potassium bromide, and dilute with 4-1/2 ounces of water.