Ferric Chloride 4 litres

Usage Directions:
Immerse copper board in solution and agitate until etching action is completed.
Ferric Chloride can etch up to a maximum of 100g of copper per litre of solution (.33 square meters or 3.5 square feet of 1 oz copper clad board).
Etching process can be sped up by heating the solution to a temperature no higher than 55C (135F).

Note: Do not dilute this product with water.