Glaze and Stain problem after firing

[dream88]

Hello, I have a problem when firing Zirconia. When I apply glaze and stains some times after firring the product comes like white powder. What makes it looks like that?

 

[GG - J]

would seem the stains, and glaze are not being fired and are just setting as if you left them in the oven to dry or set before firing.

do you have any photos?

 

[rkm rdt]

What glaze and stain are you using? What is the firing temp ?

 

[JKraver]

Lets hope this is a human error and not your oven going bad.

 

[dream88]

Well, I fire it again and all looks good. I fire around 880 and stains/glaze is from company baot ceramics. My oven is programmat p510.