Patent ID: 7758759
Filing Date: 2010-07-20
Classification: C09D,C23F,H05K,Y10T

Abstract:
1. A process for etching a metal or alloy surface which comprises applying a hot melt etch-resist ink by ink jet printing to selected areas of the metal or alloy, solidifying the etch-resist ink by cooling and then removing the exposed metal or alloy by a chemical etching process wherein the hot melt etch-resist ink comprises the components: A) 60 to 100 parts carrier vehicle comprising one or more components which contain at least one metal chelating group; B) 0 to 40 parts colorant; and C) 0 to 5 parts surfactant; wherein the ink has a viscosity of not greater than 30 cPs (mPa·s) at the firing temperature, all parts are by weight and the total number of parts A)+B)+C)=100.