Dean on wed 1 oct 08
Aloha Ivor: Thanks for your fine postings over the years. My best shots at oxidation reds have been these two recipes.
Ed's Red ^10 OX
Soda feldspar 53
Whiting 15
Talc 4
Zinc oxide 5
EPK 6
Silica 17
Tin oxide 1
Copper carbonate 0.45
Silicon carbide 0.3
Interesting for the high amount of EPK for a red Si/Al is 1.00:7.75, pretty low for a red but this is a nice blood red.
Saunder's Red ^10 OX (from Glazes for Special Effects)
Custer feldspar 25.1
Kona F-4 feldspar 25
Whiting 11.3
Gerstley borate 6.9
Silica 29
Zinc oxide 2.7
Tin oxide 1.2
Copper carbonate 0.4
Silicon carbide 0.28
This one turns to a great flambe with the addition of 3-6% Gerstley Borate.
I suggest getting superfine silicon carbide, it's real hard to get a good melt, the SiC bubbles and leaves the glaze cloudy. I bought 5 micron Sic from an abrasives website, it's used for polishing, that's about 20,000 mesh, and it's cheap, $20 worth will last years. All the other factors that make good reds are still necessary, correct thickness and proper firing. I think a long soak is needed to get a good melt but I haven't got it dialed in yet. As far as being an elitist, it's nice to be called something, anything at all.
Dean
Josh Berkus on thu 2 oct 08
Dean,
> I bought 5 micron Sic from an abrasives website, it's used for
> polishing, that's about 20,000 mesh, and it's cheap, $20 worth will last
> years.
Link? I could use some better Silica.
--
Josh Berkus
San Francisco
Dean on sat 4 oct 08
Josh: Not silica, silicon carbide, SiC. Sorry I don't have the link I used.
| |
|
