Q. What is the mix ratio of this product? the istructions say mix the contents with 250ml of water, pack contains enough for 500ml.... which to me is contradictory. does 1 pack make 250ml or 500ml?
A. Hi Steve, Thanks for your question. One pack makes 250ml – we believe it can stretch to 500ml but this will be a weaker solution and increase the etching time accordingly.