Cecilia Cunningham on wed 22 feb 12
In the past I have sandblasted a slip or engobe very gently and removed =3D
it without harming the bisque. Not knowing your piece, I do not know if =3D
this may or may not help you.=3D20
I have had students in the past do a gentle sandblasting and remove a =3D
harsh cobalt blue slip. There was a rather beautiful pale pink on the =3D
smooth surface.
Cecilia Cunningham (someone new to clayart)
On Feb 22, 2012, at 10:25 AM, Suzanne Storer wrote:
> The stain is black EZ stroke thinned way down with water applied at =3D
bisc. Do you know what might remove the stain while eating away the =3D
clay?
> Suzanne Storer
> Ogden, Utah
>=3D20
>=3D20
> On Feb 21, 2012, at 1:30 PM, Suzanne Storer wrote:
>> ...I'd like to remove some black ceramic stain wash on a surface that =
=3D
is not completely vitrified that's been fired to cone 3. I'm thinking =3D
that some kind of acid carefully applied to these small areas could =3D
lighten or remove the stain by eating it away...
>=3D20
>=3D20
> Unfortunately, I don't know of anything that will touch the stain=3D20
> (in an engobe or some such?) that won't touch the clay. I'd=3D20
> resort to covering it up with a dense clay-colored engobe, plus=3D20
> your preferred surface coating if any, and re-firing.
>=3D20
> -Snail
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