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spitting glaze (joe's red

updated fri 16 mar 01

 

Ababi on thu 15 mar 01


You see that it is the recipe I mailed yesterday:
**************************
JO'S RED ^6
Gerstley Borate..... 45.00 45.00%
EPK................. 10.00 10.00%
Talc................ 15.00 15.00%
Flint............... 30.00 30.00%
========
100.00

CaO 0.48* 12.68%w 13.54%m
MgO 0.42* 7.89%w 11.73%m
K2O 0.00* 0.04%w 0.03%m
Na2O 0.10* 2.94%w 2.84%m
TiO2 0.00 0.04%w 0.03%m
Al2O3 0.11 5.08%w 2.99%m
B2O3 0.47 15.51%w 13.36%m
P2O5 0.00 0.03%w 0.01%m
SiO2 1.97 55.52%w 55.37%m
Fe2O3 0.00 0.27%w 0.10%m

Si:Al 18.55
SiB:Al 23.02
Expan 6.02


Add:
Red Iron Oxide 22
BEST COLOR IN OXIDATION
*******************************
The main problem is how to replace the huge amount of B2O3. I will pass it
through Insight and add it.I will not try it myself, I did it once,and it
was enough!

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
EPK................. 25.63 11.09%
Talc................ 49.50 21.41%
Flint............... 43.11 18.65%
CADYCAL 100......... 65.06 28.15%
WOLLASTONITE........ 13.10 5.67%
FRIT 3110........... 34.76 15.04%
========
231.16

CaO 0.48* 12.64%w 13.51%m
MgO 0.42* 8.00%w 11.90%m
K2O 0.01* 0.42%w 0.27%m
Na2O 0.09* 2.54%w 2.46%m
SrO 0.00* 0.01%w 0.01%m
TiO2 0.00 0.05%w 0.03%m
Al2O3 0.11 5.23%w 3.07%m
B2O3 0.47 15.49%w 13.35%m
P2O5 0.00 0.03%w 0.01%m
SiO2 1.97 55.47%w 55.34%m
Fe2O3 0.00 0.12%w 0.05%m

Si:Al 18.00
SiB:Al 22.35
Expan 5.98
+22 RIO

This is the best I can do!
Ababi Sharon
ababisha@shoval.ardom.co.il
http://members4.clubphoto.com/ababi306910/

----- Original Message -----
From:
To:
Sent: Monday, March 12, 2001 4:10 PM
Subject: spitting glaze


> I'm trying to teach myself glazing...What an adventure! I mixed up
Floating
> Red that I got off this list. Fired to cone 6. What a disaster! It was
> more like "vomiting" than spitting! All the glaze was spattered all
around
> the cup and all that was left on the cup was a thin stained uneven metalic
> look...very ugly. On the inside of the cup the pool at the bottom was
sorta
> red but with "scabs". How do you like my descriptions? What happened?
I
> really hate ruining my shelves like that!...not to mention my ego.
> Here's the recipe that I used on white stoneware:
> Colemanite 55
> Talc 15
> Flint 30
> Red Iron Oxide 22
>
> Thanks,
> Dawn
>
>
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