joan woodward on wed 8 jan 03
Here's what I finally did on my recent glaze firing:
200 D/hr to 112 F
330 D/hr to 2035F
108 D/hr to 2185F hold 20 minutes
750 D/hr to 1900F
140 D/hr to 1500F.
Took about 4 1/2 hrs off my firing time. Huge variation between top shelf which was almost cone 6 to bottom shelf which didn't quite make cone 5. My green and blue versions of Variable Slate Blue were totally matte (too dry) on the bottom and glossy on the top - with something like pinholes all over the green piece on top. Bizarre. My first-time Raspberry tests looked the same (nice) on top and middle shelves.
So. . . the next time I'll fire hotter, raise the temp. on the last ramp to 150 D/hr as I was doing before, and keep the pieces I want less glossy on the bottom.
I also tried an experiment: I put 8% zircopax into some Glossy Base 2, then brushed some EZ Strokes over. At first glance I thought I'd hit the jackpot: no bleeding. At second glance, I saw that while the glaze was glossy, the EZ Strokes were totally dry-looking. The EZ Strokes come wet; I'm wondering if I mixed something in them, would I be able to gloss them up? (Ron was suggesting adding clay to dry EZ's over their majolica glaze; don't know how to try either of these approaches with wet EZ Strokes. Maybe I'm just trying to put the proverbial square peg in a round hole. . . .
What a learning process this is. . . . thanks for all the help.
Joan
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Sandy Cryer on thu 9 jan 03
In a message dated 1/8/2003 9:06:14 PM US Mountain Standard Time,
justjoanspots@YAHOO.COM writes:
> I also tried an experiment: I put 8% zircopax into some Glossy Base 2, then
> brushed some EZ Strokes over. At first glance I thought I'd hit the
> jackpot: no bleeding. At second glance, I saw that while the glaze was
> glossy, the EZ Strokes were totally dry-looking. The EZ Strokes come wet;
> I'm wondering if I mixed something in them, would I be able to gloss them
> up? (Ron was suggesting adding clay to dry EZ's over their majolica glaze;
> don't know how to try either of these approaches with wet EZ Strokes.
> Maybe I'm just trying to put the proverbial square peg in a round hole.
I've never tried them over a glaze, but "concepts" from Duncan are shiney and
most fire to cone 5/6. They are sorta shiney at low fire and shiney at cone
5/6
Sandy in Arizona
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