iandol on wed 27 nov 02
Well, Dear Friends,
so far the test tiles with up to 40% Barium Carbonate in the sample =
mixtures have been in the White vinegar solution for 48 hours. Just =
another 24 to go to meet the rules laid down by Ron and John.
But impatience got the better of me today so I had one of the tiles out =
of the vinegar for a squizzy.
All samples except the three which were already satin matt still have a =
pristine reflective surface. Yes, a full high glassy gloss, shoe shine =
bright. Nor do the three which are satin matt show any signs of =
degradation under the X 10 lens.
As a second line of discrimination I did a Barium Spot Test to see if =
there was any Barium Acetate in the Vinegar solution. Could see no =
discernible precipitate even after the solutions had been left to stand =
for an hour.
So, even with up to 40% Barium Carbonate into the mixtures these glazes =
seem to have remained stable with regards to chemistry.
But the effect on Coef of Exp is fantastic. Friends, do I know how to =
get the most marvellous clear craquelure glazes!!!!! They would be the =
envy of all of you who are thinking about using melted glass to get that =
pooling effect.=20
Well, I'll let the samples stew for a few more days and send in another =
report in a few days.
Best regards,
Ivor Redhill, South Australia.
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