Can I fire a clear overglaze at the same time as the underglaze on a greenware tile?

Question

Hello there, friendly yahoo answerers. I am working on a large aquatic scene mosaic and decided I wanted to make some fish tiles. I have rolled out my tiles, carved them into fish shapes, added in some gill details, etc. They are now bone dry so I'm preparing to decorate them. I have some underglazes on hand and I'm wondering do I have to fire the underglaze and then dip them in the clear glaze and fire again? Alternatively, do I let the underglaze dry and then dip it in the clear overglaze and then fire?
I don't do much in the way of ceramics so I hope this is not too stupid of a question.

Answer 1

I have not done a lot of ceramics, but what I remember from the art lessons at school is that under glazing has to be fired before the overglaze is added. If you do it in one go, the underglaze and the glaze may melt together. I do not know if that happens, and if so, if it would be bad.

If you do not get a definitive answer here, (or even when you do,) do go to a site where there is a forum about ceramics, glazes and so on.

(There are websites and forums and chats about everything, so I am sure there are some about this too, but it is almost one in the morning and I am getting sleepy, maybe I come back to add a link, otherwise, Google is your friend.)