Citric Acid : Powder : 1000g

Edinburgh Etch (© F.K. 1997) is a mixture of 4/5 ferric chloride solution and 1/5 citric acid solution. The citric acid will improve the etching potential of ferric as well as dissolving the sediment, enhancing it's performance and producing an etch of the utmost precision. Its great advantage over straight ferric is that it can be used in flat trays with the plate face up, as well as vertical tanks. 

Please note: due to movement during transit, grit can clog the threads of this item, causing the lid to become stiff when opened for the first time. To prevent this, hold the tub from the base when unscrewing, rather than the sides - this reduces pressure on the thread.

Guidelines for use can be found in the resources section to the right.