Enamels and Temprature

[Havi]

Hi everybody,
I know that there enamels which work with low temprature, and there are enamels that work with high temp.


My question / dilema is as follows
If I use low fire enamels at a certain stage,
and then, I want to add another layer of glass , therefore go for full fusing at high temp. will the low fire enamels - which had been pre-fired, will they burn out??


I'd be very grateful for your imput and experience....
Many thanks,
Havi

[Stephen Richard]

Yes. the coolur will become more faint

[Bert Weiss]

Each color from each manufacturer may be different. I have a low fire yellow (1050ºF) from Hereaus that survives 1500ºF. Every other color I have will fade out. Some colors survive when covered so no oxygen gets at them. I have some reds and oranges, designed for 1250ºF that will survive covered in the 1400's. One red I have will turn gray or black without oxygen but stays red with oxygen.

In general, you should be using colors that are designed to work in the range you are firing them. There are always exceptions.