Deborah Zinn on mon 27 oct 97
Hello,
I'm new to the list, so please advise if answers can be found in
archives (wherever they are?) I'm making beads from Egyptian Paste and
am interested in making as many colours as possible. So far I've made
blue (cobalt oxide), light apple green (chrome oxide), honey (rutile),
dark green (cobalt and copper carbonate), and have a batch that I think
will come out turquoise (copper carbonate). Does anyone else on this
list have an interest in Egyptian Paste beads? Any other colour
suggestions? (Hope this is considered 'clayart'?)
Also interested in different colour washes that can be used on porcelain
beads (again have used cobalt oxide, iron oxide).
I've only been signed up for a couple of days and finding fantastic
info. Thanks!
Cheers,
Deborah
George Mackie on wed 29 oct 97
Deborah. If you can get it, uranium oxide gives a clear, warm, yellow at
4% in egyptian paste. A mixture of 2% copper carbonate and 2% uranium
oxide gives a greeny-yellow quite different from the rather harsh lime
green of chrome and the turquoise of copper by itself. Otherwise I can
only suggest manganese oxide 2% (dingy purple), 5% copper oxide (not
carbonate) - turquoise with an interesting metallic sheen like lustre
ware, 2%copper carb plus 0.6% cobalt, a ravishing "royal" blue . There are
commercial stains too of course and its hard to get a decent red without
using one of them. You can buy Naples Yellow and it gives a pale yellow at
8% but not as nice as uranium. The trouble with uranium is I dont think
you can get it any more- I got mine when you could. Your paste mixture by
itself probably gives a white, but you can make this more interesting with
5% titanium oxide, its a bit warmer, almost like light ivory or a baby's
first teeth before the nicotine stains get to them. These are all trials
I conducted last spring so I can vouch for them. George
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