The most important thing to remember about dichroic glass is that the glass itself is not dichroic. Glass does not produce colors; It is the 'coating' of micro-thin sheets of various oxides and quartz that is applied to the glass surface. This creates an 'interference filter' that acts to reflect or transmit light depending on the oxides used, the thickness of the layers, and other similar factors. Making dichroic glass is a four-step process.
First, the glass is thoroughly cleaned in a spotless environment that, depending on its eventual use, can take up to four cleanings for the glass to meet technical specifications. The slightest dirt, fingerprints, or a water stain can have an unwanted effect on the glass. To buy the best dichroic art glass you may visit https://www.artglasssupplies.com/.
Once the glass is cleaned, the second step is performed: the glass is placed in an oven or a vacuum chamber containing an electron gun and a crucible or container where the metal oxides are stored. Air is pumped, compressing the pressure inside the chamber and, at the right moment, the electron gun is activated, vaporizing the oxides. Vaporized oxides will condense and adhere to any surface within the chamber, especially glass.
Once the desired oxide thickness is reached, the electron gun is turned off and a new oxide is placed for use, if necessary. The process is repeated until the desired thickness of the coating is achieved, or the planned color.
The air is then slowly pumped into the chamber, gradually cooling the molten glass and returning the pressure within the chamber to normal. The vacuum chamber is opened and the glass is removed, inspected, packaged, and shipped.