Technical questions on etching and annealing
another possibility might be that the rougher sides caused more air
pockets/bubbles in the etching medium so didn't etch as completely. when i etch i always 'work' the acid to alleviate this problem.?? m "Terry Harper" wrote in message ... "D Brock" wrote in message ... 1. Is it generally true that opaque glasses etch more easily/evenly than transparent glasses? As opal glasses have a second phase which is crystalline, it can well be that this is more easily attacked by the etchant than is the body glass. There are two main types, fluoride and phosphate opals. -- Terry Harper http://www.terry.harper.btinternet.co.uk/ |
"Michele Blank" wrote in message ... another possibility might be that the rougher sides caused more air pockets/bubbles in the etching medium so didn't etch as completely. when i etch i always 'work' the acid to alleviate this problem.?? m "Terry Harper" wrote in message ... "D Brock" wrote in message ... 1. Is it generally true that opaque glasses etch more easily/evenly than transparent glasses? As opal glasses have a second phase which is crystalline, it can well be that this is more easily attacked by the etchant than is the body glass. There are two main types, fluoride and phosphate opals. -- Terry Harper http://www.terry.harper.btinternet.co.uk/ That does indeed help. Another thing to watch is the cleanliness of item to be etched. Make sure there is no grease residue or handling residue [from hands/fingers] etc...it can act as a 'block' to the etching. Kitty |
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