Judith Keep Block on mon 25 jan 99
I have been firing to Cone 5. Recently, I have been experimenting with
painting underglazes on bisque ware. I have trouble with pinks, purples,
greens, and grays. Do any of you have any suggestions as to how I can make
the colors hold true. Are certain types of underglazes (velvets or not)
better, are certain brands more reliable, and is there a type of clear glaze
that might help in holding the color?
I have been reluctant to fire lower than Cone 5, but frankly I do not know
why. Since I make functional pieces, I worry about durability, washability,
strength, and safety. At what cone firing is the piece strong enough and safe
enough to eat off, wash in the dishwasher, and even bang a little getting it
from the shelf to the table to the sink to the dishwasher?
Thanks.
Judy Keep Block
tmartens on wed 27 jan 99
Judy, some pinks and yellows just don't like the higher temps.
Amaco medium pink is one of these, but their Rose and Rosymauve
do well at ^5. Again, some clear glazes seem to wash out the colours,
you need to experiment.
As for firing at a lower temp, it all depends on the temperature at
which your clay matures and how well your glaze fits the clay body.
Toni Martens.
----------------------------Original message----------------------------
I have been firing to Cone 5. Recently, I have been experimenting with
painting underglazes on bisque ware. I have trouble with pinks, purples,
greens, and grays. Do any of you have any suggestions as to how I can make
the colors hold true. Are certain types of underglazes (velvets or not)
better, are certain brands more reliable, and is there a type of clear glaze
that might help in holding the color?
I have been reluctant to fire lower than Cone 5, but frankly I do not know
why. Since I make functional pieces, I worry about durability, washability,
strength, and safety. At what cone firing is the piece strong enough and safe
enough to eat off, wash in the dishwasher, and even bang a little getting it
from the shelf to the table to the sink to the dishwasher?
Thanks.
Judy Keep Block
Helen Crowe on wed 27 jan 99
-----Original Message-----
From: Judith Keep Block
To: CLAYART@LSV.UKY.EDU
Date: Monday, January 25, 1999 2:16 PM
Subject: Underglazes for Cone 5
>----------------------------Original message----------------------------
>I have been firing to Cone 5. Recently, I have been experimenting with
>painting underglazes on bisque ware. I have trouble with pinks, purples,
>greens, and grays. Do any of you have any suggestions as to how I can make
>the colors hold true. Are certain types of underglazes (velvets or not)
>better, are certain brands more reliable, and is there a type of clear
glaze
>that might help in holding the color?
>
>I have been reluctant to fire lower than Cone 5, but frankly I do not know
>why. Since I make functional pieces, I worry about durability,
washability,
>strength, and safety. At what cone firing is the piece strong enough and
safe
>enough to eat off, wash in the dishwasher, and even bang a little getting
it
>from the shelf to the table to the sink to the dishwasher?
>
>Thanks.
>Judy Keep Block
>I believe that you cannot have any zinc in your clear overglaze for the
pinks, purples etc to develop. At cone 5 those colours should be fine.
Helen
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