Flashed glass

Flashed glass, or flash glass, is a type of <a href="/facts/Glass/hezRsAGf">glass</a> created by coating a colorless gather of glass with one or more thin layers of colored glass. This is done by placing a piece of melted glass of one color into another piece of melted glass of a different color and then <a href="/facts/Glassblowing/dWf2rYAD">blowing</a> the glass.
As well as its use for glass vessels, it has been very widely used in making <a href="/facts/Stained_glass/oUCut2Mc">stained glass</a> since medieval times, often in combination with "<a href="/facts/Pot_metal_glass/oUCut2Mc">pot metal glass</a>", made by colouring molten glass, giving colour all through the sheet. 
The colored glass can be partly or completely <a href="/facts/Glass_etching/A1cN8LWA">etched</a> away (through exposure to <a href="/facts/Acid/FySU18n1">acid</a> or via <a href="/facts/Sandblasting/eP6SvlWc">sandblasting</a>), resulting in colorless spots where the colored glass has been removed.
Flashed glass can be made from various colors of glass. A finished piece of flashed glass appears <a href="/facts/Translucent/PRryNNW6">translucent</a>.

Flashed glass open-in-new

Flashed glass