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Dichroic Glass
Monday, 24 November 2008 20:02

Dichroic Glass Paired Pendants/Earrings

Size is approximately 10x30mm
Ring is attached for dangling
Sold by the matched pair
Each are unique: you choose the item number
and we will try to match it as closely as possible.
$18.00 per pair

[Click the pic to enlarge]
Order these by item number.

Dichroic Glass Rectangle Beads

Size is approximately 18x30mm
Drilled across the top horizontally.
$6.50 per bead

[Click the pic to enlarge]
Order these by the piece.

"Dichroic" is defined as the property of having more than one color, especially when viewed from different angles. Dichroic glass is a high-tech spin-off of the space industry. Thin layers of metallic oxides, such as titanium, silicon, and magnesium are deposited upon the surface of the glass in a high temperature, vacuum furnace.

The glass to be coated is carefully cleaned, and fastened to a planetary arm in the top of the furnace chamber. The oxides are placed in a crucible on the bottom of the chamber. Air inside of the chamber is removed with a high vacuum-producing cyropump, and the chamber is heated to 300 degrees F. The metallic oxides are vaporized by an electron beam, and the rotating glass target is evenly coated with many thin layers. The resulting color is determined by the individual oxide compositions.

Dichroic coatings transmit certain wavelengths of light, while reflecting others, thus creating an interference-effect similar to the iridescence observed in Nature's fire opal, dragonfly wings and hummingbird feathers. The transmitted color is different than the reflected color, and a third color is produced by viewing the dichroic piece at a 45 degree angle. The resulting colors are pure, saturated, single wavelengths of light, that appear to originate from within the dichroic piece.

Last Updated on Friday, 19 December 2008 19:28

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