How do they paint detail on stained glass, all glass paint seems to be for indoor use only?

Stained glass artists use a special paint that turns to glass when baked at high temperatures.


First the artist draws the pattern of the window on paper with the lead lines and colors marked.


Then they cut the pieces of glass and lay them out on the paper sheet. Then the details in faces and on plants are painted on the surfaces that will be inside the building with a special type of paint called ';vitrifiable'; paint.


This vitrifiable paint turns to glass when heated.


To heat the painted pieces they are baked ';fired'; in a big, very hot, oven called a ';kiln'; at least once to turn the paint to glass and fuse this paint permanently to the glass.


Then the pieces are joined together at the edges with lead to make the final completed window.How do they paint detail on stained glass, all glass paint seems to be for indoor use only?
My son does stained-glass artwork, and as far as I know, there is no painting involved. One can used small crushed, colored glass, sometimes in the form of beads, and pretty much place it where ever a detail is wanted...when the glass is fired in the oven, it will produce the detailed effect, depending upon the skill the artist has at placing the glass beads/crushed glass in the proper place, having the oven at the right temperature, etc.





Stained glass is challenging, but the effects are so beautiful!How do they paint detail on stained glass, all glass paint seems to be for indoor use only?
A great deal of Victorian stained glass has painted detail.


However, as it's painted on the inside it's not open to the elements, it is indoors.
You are joking?





The glass is ';stained'; not painted - ie the glass is coloured during the manufacturing process while it's still molten. Not painted on afterwards.





You can get glass paint - but as you say - that's for indoor use





Edit: True, yes - sorry.