[SmartsyArtsy]

I am washing new shelves and there are a couple of spots that will not accept the kiln wash. What causes this and should I be concerned/return them to supplier?

[Nelly]

SmartsyArtsy, on 28 March 2012 - 07:58 PM, said:

I am washing new shelves and there are a couple of spots that will not accept the kiln wash. What causes this and should I be concerned/return them to supplier?

Dear SmartsArtsy,

This is what happened to me. It does seem as though kiln wash can be finicky. I suggest you read through all the information on this topic on this site. It will help you to make sense of it.

You may start a new forum to address your topic directly??

Nancy

[Mark C.]

Chris
I have never used store bought wash in 38 years-I have a bag of it someone gave me and it appears very cheap. No alumina in it. I think I'm giving it to our local ceramic supplier. I did read you added feldspar to yours (Kingman? custar? G200? S spar?-Nepheline syenite? or some other??)
I have no idea on why but either way I think you must have some oil or grease on shelve-have you bisqued them yet?? That will burn off contaminants
Ceramic process can be frustrating and problem solving is what its all about ( you are your own tech now)
This thread has some great wash formulas-make one up and toss out that cheap wash. Good wash costs $$ but equals great results.
My 2 cents
Mark

[SmartsyArtsy]

Thanks, both of you. I have read this thread carefully, and that is why I added the G-200 last week. I am about to fire my first glaze, and that is why I bought new shelves today. I wondered about there being oil or something on it but I can make sure those spots are not exposed to the edges of my tiles.

I will mix up my own batch of wash going forward.