Langridge Copper Sulphate 4Kg
For use in Etching Zinc and Aluminium Plates.
1 litre of warm water
100 gms of copper sulphate
100 gms of sodium chloride (salt)
Add copper sulphate and salt to water and stir till dissolved. (Always add chemical to water never the other way round.) For aluminium double the amount of salt to copper sulphate.
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