Posted by Sarup Chopra on April 16, 2008 at 10:40:47:
In Reply to: Ethyl alcohol posted by TJS on April 05, 2008 at 10:39:19:
Your question presumably refers to Nital. If this in fact is the case, for microetching a 2% solution is commonly used; meaning add 2 ml of HNO3 to 98 ml of ethanol.