PRESSURE SENSITIVE RECORDING PAPERS

摘要

PRESSURE SENSITIVE RECORDING PAPERS A dyestuff acceptor comprising polyvalent metal salts of aromatic carboxylic acid containing at least 12 carbon atoms and having a hydroxyl radical at the ortho-position to a carboxyl radical thereof forms stable and rich color by rapidly reacting with a dyestuff and constitutes a novel unit of pressure sensitive recording papers in combination with the dyestuff.