Glass colorants

Description

Inorganic materials are used to color or opacify Glass as well as to color ceramic glazes and vitreous enamels. Examples include:

- opaque white: fluorides, tin oxide, or Bone ash.

- iridescence: Silver and Bismuth.

- black: two or more cobalt, copper, iron and nickel oxides, or Iron and Carbon.

- gray: Nickel oxide and Titanium dioxide.

- purple: neodymium oxide.

- blue: Cobalt oxide, copper oxide.

- blue-green: Iron chromate, or copper oxide.

- green: iron oxide and Chromic oxide.

- yellow-green: Chromic oxide, or Cadmium sulfide.

- yellow: uranium oxide, Iron/Manganese, Ceric oxide, or Silver oxide (surface).

- amber: Iron oxide and Sulfur, Coal and sulfur, or Iron disulfide.

- red: Cadmium sulfide, cadmium selenide, manganese, metallic Gold, copper oxide, Gold chloride or gold-tin purple (purple of Cassius).

- violet: Manganese oxide

Synonyms and Related Terms

glass colourants (Br.); colorantes para vidro (Port.)

Resources and Citations

• Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979

• Edward Reich, Carlton J. Siegler, Consumer Goods: How to Know and Use Them, American Book Company, New York City, 1937