Etching Copper and Brass:
The Edinburgh Etch
A new etching solution for copper and brass
by Friedhard Kiekeben
special thanks to Keith Howard, Michael McCann, and Robert Adam who helped revitalize ferric chloride-based etching
Making up the Edinburgh Etch
Refer to the INTAGLIO MANUAL for detailed instructions on PLATE PREPARATION, ETCHING THE PLATE and more.
Products and equipment needed to make up the Edinburgh Etch:
(Above) Howard Pro-Vertical Etching Tank: designed by Keith Howard.
See www.danielsmith.com for details.
Make up the Edinburgh Etch as follows:
The Edinburgh Etch solution consists of five parts.
Four parts are a saturated ferric chloride solution.
One part is a citric acid solution.
4 parts ferric chloride solution + 1 part citric acid solution = Edinburgh Etch
4 liters ferric chloride solution + 1 liter hot water mixed with 300ml citric acid powder (ratio 3:1) = Edinburgh Etch
*These are sample quantities: use less or more according to the ratios provided.
| METAL SALT ETCHING|
Copper and Brass: Etch in Edinburgh Etch
Zinc, Steel, Aluminum: Etch in Saline Sulfate Etch
DO NOT MIX WARM AND COLD COLORED SOLUTIONS AND METALS