Abstract
Adsorption isotherms of Congo Red, Benzopurpurine 4 B and Benzopurpurine 10 B, from the dyebath within the range of concentrations 1.5×10-3 mole dyes per litre have been determined on cellophane sheets.The results of these experiment are as following:The ratio between the ionic products of dye anion and Na ion concentrations from dyebath and from cellophane sheet cease to maintain the constant value, in case where the cellophane sheet adsorbs more than about 4×10-2 mole per kg. This result is due to the fact that the adsorption amount is closely connected with the saturation value; for that reason, this tendency becomes more conspicuous as the adsorption amount goes on increasingly.
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