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  2. Cobalt glass - Wikipedia

    en.wikipedia.org/wiki/Cobalt_glass

    Cobalt glass—known as "smalt" when ground as a pigment—is a deep blue coloured glass prepared by including a cobalt compound, typically cobalt oxide or cobalt carbonate, in a glass melt. Cobalt is a very intense colouring agent and very little is required to show a noticeable amount of colour. Cobalt glass plates are used as an optical ...

  3. Blue pigments - Wikipedia

    en.wikipedia.org/wiki/Blue_pigments

    It combined cobalt(II) oxide with aluminum(III) oxide at 1200 °C. It was also used as colorant, particularly in blue glass and as the blue pigment used for centuries in Chinese blue and white porcelain, beginning in the late eighth or early ninth century. [15] Cobalt glass, or Smalt, is a variation of cobalt blue. It is made of ground blue ...

  4. Blaafarveværket - Wikipedia

    en.wikipedia.org/wiki/Blaafarveværket

    The works mined cobalt ore and manufactured by smelting blue cobalt glass and cobalt blue (cobalt aluminate) pigment. It is currently a large open-air industrial museum and an art gallery; it is the largest and best preserved mine museum in Europe, and one of Norway's most visited attractions.

  5. 1962 Mexico City radiation accident - Wikipedia

    en.wikipedia.org/wiki/1962_Mexico_City_radiation...

    A typical cobalt-60 capsule, comprising: (A) An international standard source holder (usually lead), (B) a retaining ring, and (C) a teletherapy "source" composed of (D) two nested stainless steel canisters welded to two (E) stainless steel lids surrounding an (F) internal shield (usually uranium metal or a tungsten alloy) that protects a (G) cylinder of radioactive source material.

  6. Chemical coloring of metals - Wikipedia

    en.wikipedia.org/wiki/Chemical_coloring_of_metals

    Various colors on stainless steel 18 Cr / 8 Ni 7.5 g of sodium dichromate , 1000 mL of sulfuric acid (1.24 g/cm 3 ), lead cathodes, object as an anode, 70-90 °C temp, 0,06 A/dm 2 , voltage 1.3 V – colors depend on the duration of the procedure (5-50 min.), brown, blue, reddish brown, yellow, green.

  7. Cobalt blue - Wikipedia

    en.wikipedia.org/wiki/Cobalt_blue

    Cobalt blue is a blue pigment made by sintering cobalt(II) oxide with aluminium(III) oxide (alumina) at 1200 °C. Chemically, cobalt blue pigment is cobalt(II) oxide-aluminium oxide, or cobalt(II) aluminate, CoAl 2 O 4. Cobalt blue is lighter and less intense than the (iron-cyanide based) pigment Prussian blue.

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