Cobalt green
Encyclopedia
Cobalt green, sometimes known as Rinman's green or Zinc Green, is a translucent green pigment
made by heating a mixture of cobalt (II) oxide and zinc oxide. Sven Rinman
, a Swedish chemist, discovered this compound in 1780. Although it is stable and can be safely mixed with other pigments, it is rarely used because it is a weak pigment for its cost. Cobalt Green has recently been tested in the US to be used in “spintronic” devices. Cobalt green is useful in this device mainly because of its magnetic properties and can be used at room temperature, whereas other materials must be super cooled. Another interesting role this compound can play in is being tested for the use in street furniture
, since they posses rapid drying characteristics and intense color.
Solubility = Insoluble in water and most petroluem solvents
Appearance and Odor = Green paste; linseed oil odor
Conditions to avoid = extreme heat
First Aid Procedures = eye contact- wash with clean water for at least fifteen minutes. Medical attention if irritation persists. Skin contact-N/A. Inhalation-N/A.
pigments have a mix of white pigments and individual crystals that appear to be colorless and because of their particle size, its ability to accept an acid in a mixture, and compatibility with countless natural and unnatural systems; it is used in many industries and processes. Since zinc is used in many paint films, acids depend on the zinc oxide to avoid extra catalyzed degradation of the binder. When zinc oxide is mixed with a cobalt oxide the compound creates an intense green color and can further be used as medium-temperature pigments. The formation chemistry; which is based off of the mutual suppression of the crystal lattices, and the low content of cobalt, helps this compound gain interest. The purpose of this compound is to try and prepare an innovative cost-effectively friendly green-colored inorganic pigment. Unfortunately, the pigment was never an artist’s favorite since it created relatively weak colors.
Color is an important characteristic of many ceramic products. Pigments with cobalt-based ceramics are generally used for colored glazes in the ceramic industries for floor or wall whitewares. Ceramic pigments are considered to be inorganic crystalline structures that develop a stable color. They have a high resistance with respect to light, environment, and high temperature chemicals. The broad horizon of their colors is quite large: green, blue, violet, yellow, black and brown. Synthetic approaches such as sol-gel technology, solution combustion method, polymeric precursor method, and so on are using cobalt-based pigments more recently.
Cobalt Violet- Cobalt phosphate or cobalt arsenate was used to create the violet color of Cobalt Violet. Back in 1996, a painting was examined and discovered an unknown violet sample. This sample was made from cobalt and arsenic
and was found for the first time in the Analytical Research Laboratory of the Canadian Conservation Institute. This pigment also has an important significance in art history. It is ideal for landscape paintings in the United Kingdom. This color is best used when mixing with other pigments such as cobalt blue and green when the artist is trying to find a subtle feel with cool tones to his/her painting.
Cobalt Yellow- This pigment has been tested as a possible non-volatile magnetic semiconductor
with spintronic applications along with cobalt green.
Pigment
A pigment is a material that changes the color of reflected or transmitted light as the result of wavelength-selective absorption. This physical process differs from fluorescence, phosphorescence, and other forms of luminescence, in which a material emits light.Many materials selectively absorb...
made by heating a mixture of cobalt (II) oxide and zinc oxide. Sven Rinman
Sven Rinman
Sven Rinman was a Swedish chemist and mineralogist who discovered the pigment cobalt green, sometimes also called Rinman's green. He had a great influence on mining and the steel production in Sweden.-Life and work:...
, a Swedish chemist, discovered this compound in 1780. Although it is stable and can be safely mixed with other pigments, it is rarely used because it is a weak pigment for its cost. Cobalt Green has recently been tested in the US to be used in “spintronic” devices. Cobalt green is useful in this device mainly because of its magnetic properties and can be used at room temperature, whereas other materials must be super cooled. Another interesting role this compound can play in is being tested for the use in street furniture
Street furniture
Street furniture is a collective term for objects and pieces of equipment installed on streets and roads for various purposes, including traffic barriers,...
, since they posses rapid drying characteristics and intense color.
Properties
Molecular Formula = CoZnO2Solubility = Insoluble in water and most petroluem solvents
Appearance and Odor = Green paste; linseed oil odor
Conditions to avoid = extreme heat
First Aid Procedures = eye contact- wash with clean water for at least fifteen minutes. Medical attention if irritation persists. Skin contact-N/A. Inhalation-N/A.
Background
Zinc oxideZinc oxide
Zinc oxide is an inorganic compound with the formula ZnO. It is a white powder that is insoluble in water. The powder is widely used as an additive into numerous materials and products including plastics, ceramics, glass, cement, rubber , lubricants, paints, ointments, adhesives, sealants,...
pigments have a mix of white pigments and individual crystals that appear to be colorless and because of their particle size, its ability to accept an acid in a mixture, and compatibility with countless natural and unnatural systems; it is used in many industries and processes. Since zinc is used in many paint films, acids depend on the zinc oxide to avoid extra catalyzed degradation of the binder. When zinc oxide is mixed with a cobalt oxide the compound creates an intense green color and can further be used as medium-temperature pigments. The formation chemistry; which is based off of the mutual suppression of the crystal lattices, and the low content of cobalt, helps this compound gain interest. The purpose of this compound is to try and prepare an innovative cost-effectively friendly green-colored inorganic pigment. Unfortunately, the pigment was never an artist’s favorite since it created relatively weak colors.
Color is an important characteristic of many ceramic products. Pigments with cobalt-based ceramics are generally used for colored glazes in the ceramic industries for floor or wall whitewares. Ceramic pigments are considered to be inorganic crystalline structures that develop a stable color. They have a high resistance with respect to light, environment, and high temperature chemicals. The broad horizon of their colors is quite large: green, blue, violet, yellow, black and brown. Synthetic approaches such as sol-gel technology, solution combustion method, polymeric precursor method, and so on are using cobalt-based pigments more recently.
Color Pigments
Cobalt Blue- Has important significance in art history. Cobalt blue was used in the ancient world which includes Egypt and Mesopotamia. The significant blue color was found in glass works and ceramic glazes of the early middle ages. The molecular formula is listed at Co2SiO4 and is soluble in water.Cobalt Violet- Cobalt phosphate or cobalt arsenate was used to create the violet color of Cobalt Violet. Back in 1996, a painting was examined and discovered an unknown violet sample. This sample was made from cobalt and arsenic
Arsenic
Arsenic is a chemical element with the symbol As, atomic number 33 and relative atomic mass 74.92. Arsenic occurs in many minerals, usually in conjunction with sulfur and metals, and also as a pure elemental crystal. It was first documented by Albertus Magnus in 1250.Arsenic is a metalloid...
and was found for the first time in the Analytical Research Laboratory of the Canadian Conservation Institute. This pigment also has an important significance in art history. It is ideal for landscape paintings in the United Kingdom. This color is best used when mixing with other pigments such as cobalt blue and green when the artist is trying to find a subtle feel with cool tones to his/her painting.
Cobalt Yellow- This pigment has been tested as a possible non-volatile magnetic semiconductor
Semiconductor
A semiconductor is a material with electrical conductivity due to electron flow intermediate in magnitude between that of a conductor and an insulator. This means a conductivity roughly in the range of 103 to 10−8 siemens per centimeter...
with spintronic applications along with cobalt green.