MKarcher1@aol.com on wed 26 jun 96
My friend Alfredo Ratinoff requested that I post the following message
to Clayart:
"I am searching for a sodium-composed industrial frit with no borax;
alternatively I would be interested in a glaze base with similar
characteristics that would allow me to obtain the true Egyptian blue with
copper oxide. Any temperature (from cone 06 to 9) is okay. If someone has
any information to share, I will be very grateful. Thanks in advance."
I look forward to your responses which I will pass on to Alfredo.
June Perry on wed 26 jun 96
Frit 3293 is a sodium no boron frit. I don't know if it is still available.
This is a Ferro Frit whose formula is:
16.7 Na2o
.2 Cao
.8 Mgo
5.9 Al2o3
76.4 Sio2
Pemco frit P-283 can be substituted for the Ferro Frit 3293 listed above.
They are very, very similar in composition.
There are some high sodium, no boron frits which contain barium but I didn't
give these. I think he would be better served to check out the two listed.
Regards,
June Perry
EMail: Gurushakti@aol.com
obrienjr@bigvax.alfred.edu on thu 27 jun 96
>"I am searching for a sodium-composed industrial frit with no borax;
GF-106 has the following UMF-
Na2O .92
CaO .02
MgO .06
Al2O3 .20
SiO2 4.38
The fusion point is 1920 degrees F.
Randy O'Brien
obrienjr@bigvax.alfred.edu
obrienjr@bigvax.alfred.edu on fri 28 jun 96
I received a request from Tom Buck to give a source for the frit GF-106.
The analysis I posted earlier was taken from the handbook Val Cushing
uses in his glaze calculation classes. The frit is stocked in the
undergraduate glaze room at Alfred University. I'm not sure where it is
available from commercially. I will find out the source when summer
school begins on July 15 and post it to the list (unless someone else is
able to post it earlier).?i+k,/^F
v
M"33
{
zV
Randy O'Brien
obrienjr@bigvax.alfred.edu
| |
|
