Citric Acid Powder is a non-toxic ingredient for making Edinburgh Etch (© F.K. 1997). Edinburgh Etch is a mixture of 4/5 ferric chloride solution and 1/5 citric acid solution. The citric acid improves the etching potential of the ferric chloride while dissolving sediment, enhancing performance and producing a precise etch.
The advantage over straight ferric chloride is that it can be used in flat trays with the plate face up, as well as in vertical tanks. Guidelines for use can be found in the resources section.
- Enhances the etching performance of ferric chloride
- Creates an etchant for copper and brass with no harmful vapours
- Removes sediment so plates can be etched face up in flat trays
- Reusable and recyclable container
