Comment

Comment by Norm Stuart on December 31, 2013 at 12:30am

Amaco lists their manganese Saturation Gold as food safe, but with so much manganese dioxide I've never used it for food surfaces.

http://www.amaco.com/learn-about-potters-choice-glazes/pc-2/

Your manganese dioxide over black looks interesting.

Comment by Teri Hannigan on December 30, 2013 at 8:45pm

Oh, I think this one is superior to Amaco's.  Whoa, that's a lot of manganese dioxide!  I painted md over a black glaze and got a gun metal effect:  http://cone6pots.ning.com/photo/52-black-holes?context=user  Afterwards, I read about how toxic it is--Yikes!

Comment by Norm Stuart on December 30, 2013 at 8:30pm

This is the glaze recipe from Kagemas which, in my experience, fires just like Amaco Saturation Gold. Notice where it is the most golden, it has wrinkles. Steven Lampron of Amaco decribes their Saturation Gold the same way.

http://www.kazegamas.com/Golds-C5.htm

Comment by Teri Hannigan on December 30, 2013 at 2:01pm

Oh yes, that is a very beautiful glaze, Norm!  I haven't had issues with Amaco Saturation Gold running, but I have to say I haven't used it much.

Comment by Norm Stuart on December 30, 2013 at 1:59pm

I prefer my "Black Gold Matte" recipe in the Insight-Live Glaze database to Amaco Saturation Gold.  It stays where you put it - not as glassy and doesn't wrinkle like Saturation Gold.

http://insight-live.com/insight/recipes.php?rz=8Mn1pKz7vr

Comment by Teri Hannigan on December 30, 2013 at 1:58pm

I use B-mix with grog for most of my stuff.

Comment by Teri Hannigan on December 30, 2013 at 1:56pm

Oooh I LOVE ancient Jasper--one of my favorite glazes--also loves to be layered and loves a thicker application.  Amaco has great Tech Support--I am always calling them with pesky questions about their glazes. I make all sorts of notations on my glazes as to how they like to be applied.

Comment by Norm Stuart on December 30, 2013 at 1:44pm

Amaco sells two really finicky glazes - Ancient Jasper and Palladium. On Digitalfire the Ancient Jasper recipe is called Floating Red.  I wish I understood the chemistry of Palladium and the glaze below, but I don't yet.

Spectrum has a nearly identical glaze, with a gold color, Spectrum 1116 Metallic Mirror Glaze - good luck getting it to look lie this.  http://www.axner.com/spectrum1116metallicmirrorglaze1pint.aspx

Palladium does look best when it's far too runny, like a Cone 6.5, but it also has a big problem pin-holing on some clay.  Based on my experience with frits this suggests it's a fluorine frit based glaze like 3269 or 5301 which foams with some clays.  Under the surface, Palladium has a bluish cast while Metallic Mirror has a green cast.

For the past two years we've been slow-cooling the kiln at a very slow 50 F per hour between 1,800 and 1,500. Slow-cooling doesn't help Palladium, but I can't say it hurts the finished look either.

I have Palladium around my head on this porcelain self-portrait. Of course I hoped for a mirror like finish, but it came out not quite so mirrorish and the portrait a bit too cartoonish for my taste.

If you don't mind leaded glazes, Western Pottery / Clay Planet sells a terrific ^04 Aztec Gold.  Apply it over a previously fired ^6 clear and it's a stunning Oscar Award Gold without the "texture".

http://shop.clay-planet.com/pint-722-aztec-gold.aspx

Comment by Teri Hannigan on December 30, 2013 at 1:22pm

I love your gunmetal black!  Palladium is like this where thinly applied.

PC-4 Pallladium is a “Metallic Float Glaze”. As with all float glazes it is important to achieve a good thickness. The float in these glazes consists of metallic materials that give a reflective metal look. If the glaze application is thin, the surface will look splotchy and the metal film will look incomplete. (Note: Palladium tends to be fluid so feathering the glaze near the bottom of a piece is advised or leaving extra room for the glaze to flow. It also looks best on a tight porcelain body.)

Also, Have you tried a "hold" at the top of your firing before cooling ever so slowly? I think Palladium likes it a little hotter to bring out the silver.

In any case, those metallic glazes sure are finicky, aren't they?

Comment by Norm Stuart on December 30, 2013 at 12:38pm

Manganese saturation glazes make all sorts of "metallic gold" and brass colors.  But silver is elusive.

The closest I have is a "Gunmetal Black" which is a variation of the golds.

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