How to Make Dichroic Glass

The most important thing to remember about dichroic glass is that the glass itself is not dichroic. Glass does not produce colors; It is a "coating" of thin, ultrafine sheets of various oxides and quartz that is applied to the surface of the glass. This creates an "interference filter" that reflects or transmits light based on the oxides used, the thickness of the layers, and other similar factors. The dichroic glass manufacturing process consists of four steps.

First, the glass is thoroughly cleaned in a flawless environment, which, depending on the end-use, may require up to four glass cleanings to meet the technical specifications. The slightest dirt, fingerprints, or drop of water can have an undesirable effect on the glass. You can get the best dichroic glass online via https://www.artglasssupplies.com/coe90-dichromagic-dichroic.

Once the glass is cleaned, the second step is done: the glass is placed in a furnace or vacuum chamber containing an electron gun and a crucible or container where the metal oxides are stored. 

Air is pumped to pressurize the chamber and at the right moment, the electron gun is activated, vaporizing the oxides. The vaporized oxides condense and stick to any surface inside the room, especially glass.

Once the desired oxide thickness is reached, the electron gun is turned off and new oxide is put to use, if necessary. The process is repeated until the desired coating thickness or planned color is reached.

The air is then slowly pumped back into the chamber, gradually cooling the molten glass and returning the pressure inside the chamber to normal. The vacuum chamber is opened, the glass is removed, inspected, packed, and shipped.