Powder painting

Firstly, the powder is actually ground glass typically from a single manufacturer who supplies an extensive color palette.

[1] The process is fairly simple whereby the dry powders are arranged on sheet glass in any desired pattern or design.

Since large scale images are possible the artist's hand can be seen in the application of the powders as drizzles, smears, sprays much like an actual painting.

The opposite side of the glass can be prefired with colors, painted with normal oils or acrylics, or gold- or silver-plated.

Depending on the opacity level of the font's powders the color or reflection of light from gold leafing can add an interesting inner glow.