 Temperature can be increased to raise the etching rate.Continuous stirring of the solution during etching process helps to have homogeneous solution which may etch uniformly by removing etched material from the surface.Virgil Ierunca

Virgil Ierunca (; born Virgil Untaru ; August 16, 1920, Lădești, Vâlcea County – September 28, 2006, Paris) was a Romanian literary critic, journalist and poet.