high fire glass enamel paints

I am experimenting with using glass enamel paints. I have fired my first piece - a 10" clear circle with a design of yellow and green grasses and some white clover. It came out of the kiln much more faded in color than when it went in. I fired it to 1425 and held for 10 minutes. Does anyone have experience with using glass enamel paints? If so, how does one keep the strong color that appears when the paint is dry from fading in the kiln? Is 1425 too hot and did I hold too long?

Temperatures for enamels

774C is far too high for enamels.  Most glass enamels mature at 520-580C.  Anything over that and they begin to "fade".  If you need to fire so high for the glass, then you need two firings one for the glass and another for the enamels.  Also you need only a stablisation hold at the top temperature.  I use one minute.  Some do not use any hold at the top temperature.

Another possibility is to use ceramics on glaze colours that fire in the 780 - 850C region.  They tend to be opaque though.

Stephen Richard

blogs at: http://www.verrier-glass.blogspot.com/ and  http://www.glasstips.blogspot.com/

Temperatures for enamels

Thanks for responding. Since I am firing on a flat circular piece with only enamels I will try the lower temp and i min hold. I plan to slump this piece over a mold for the second firing. Would really like to be successful with this process as I am really a painter and would like to make "paintings" on glass.

Temperatures for enamels

I fired my 2nd piece at 1000 - held for 1 minute and it too came out very pale. I had the kiln lid cracked open about 1" as this piece had red and orange berries and leaves in a band around the edge. One area of the band came out brighter in color - almost good. It was nearest the small peek hole in the kiln. Anyone have any answers? Now I am going to slump these pieces over my star mold. Then I will add color back to them with my Pebco glass paints and fire them in my kitchen oven. I know that works.

Glass enamel challenge

Hi,
Uou don't mention what type of enamel you are using...and in my limited experience there is a huge difference between them, and the results they produce. Also I wasn't clear from your first post, and it's initial reply, if you were speaking of heat at F level or C level?

Fuse Master makes some lovely enamels, as does Ferro Sunshine enamels.  The Fuse Master line has lower fire (around 1250-1300* F, I believe) and high fire (around 1450-1525* F  I believe) so you can plan on painting before slumping with the former and before fusing with the latter.  Be sure to work with a painting medium and make some small tests...even finding the brand which works for you does not guarantee that each color in the their line will be consistent.  Hope that helps a tad...

Windows listen attentively for the sound of broken glass.

"774C is far too high for

"774C is far too high for enamels."

It depends on the enamels.  Tracing black, Thompson enamels, and Glassline all hold up fine at full fuse temps.

Ceramic glazes hold up fine on the surface at high temps.  Capped with clear many will fade (and even disappear) starting at around 1450° F (787° C).

----------------------
Paul
FusedGlass.Org
Helios Kiln Glass Studio
PaulTarlow.com

 

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