Patent ID: 6667071
Filing Date: 2003-12-23
Classification: B05D,G03C

Abstract:
A method for coating a support with a layer of a composition comprising an aqueous or an organic solvent and at least a surfactant, wherein said surfactant agent has been selected by a sequence comprising the steps of:a) after formation of said layer, applying temperatures Ti to n successive zones Zn of said layer so that a temperature gradient &Dgr;T is created between a zone Zi and a zone Zi+1 and the temperatures of the zones Zi and Zi+2 are the same, wherein n is an integer representing the number of zones, i is an integer between 1 and n, and &Dgr;T is chosen so as to create a measurable periodic variation of thickness of said layer from the 1st to the nth zone; b) measuring said thickness Hx of each zone; c) determining an average variation of said thickness &Dgr;Hm of said layer, and d) repeating steps (a) to (c) for a control composition comprising said aqueous or said organic solvent to determine &Dgr;Hm, wherein said surfactant satisfies the following condition: &Dgr;Hm of said layer with said surfactant m for said control.