Abstract
SILVER salts of carboxylic acids such as formic acid, acetic acid and oxalic acid1 became coloured in light. Similarly, suspensions of silver polyalkylacrylates produce various coloured colloidal solutions of silver in light2. These phenomena show that silver carboxylates are easily photolysed to separate silver. We have investigated the photolyses of silver salts of certain high molecular carboxylic acids such as polyacrylic acid, polymethacrylic acid, poly-L-glutamic acid3, alginic acid4, pectic acid5, carboxymethylcellulose and cellulose acetate phthalate, and we report that the smooth films of these silver salts form a silver mirror arising from photolytic silver on their surfaces. This method of producing a thin silver film on the polymer film may be of technical interest because of the optical and electrical properties of the irradiated film.
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