| abstract |
THERE IS PROVIDED A PROCESS FOR THE ADHESIVE METALLIZATION OF PLASTIC SURFACES INCLUDING A CHROMOSULFURIC ETCH AND SUBSEQUENT CHEMICAL METALLIZATION AND ELECTROPLATING AND IMPROVEMENT IN WHICH THE PLASTIC SAMPLE, AFTER THE CHROMOSULFURIC ACID ETCHING, IS PREFERABLY TREATED IN AN AQUEOUS ALKALINE INTERMEDIATE BATH CONTAINING AMMONIA OR A MATERIAL HAVING, PRIMARY, SECONDARY OR TERTIARY AMINO GROUPS AND/OR CONTAINING A QUATERNARY AMMONIUM COMPOUND. |