One of the disadvantages of tenar blue and schmalt is that these colors appear dirty purple in evening light.
Posted: Mon Feb 10, 2025 8:44 am
Lazurite blue;
Vivianite blue;
Azurite (verditer);
Prussian blue (Paris blue, Prussian blue, Antwerp blue);
Ultramarine (natural and artificial);
Smalt (royal blue, cobalt glass, schmalt) is potassium glass, colored dark blue with cobalt-potassium silicate. It is used for bluing paper, fabrics, starch, and also for coloring glass and porcelain;
Cobalt blue (Thénard blue, cobalt ultramarine, Leyden blue). Significantly stronger than ultramarine, as it hardly changes under the influence of alkalis and weak acids;
Indigo;
Ceruleum;
Phthalocyanine blue;
Manganese blue.
In smaller quantities, various blue copper paints are used, such as Bremen blue and mineral or mountain blue, Egyptian blue, oil blue or copper indigo and celestial blue. Azure or ultramarine, as well as Paris blue or Prussian blue, are used in industry and everyday life in significant quantities.
Sky blue (Bleu celeste) is a very beautiful, light blue color, and its composition is tin-cobalt salt CoSnO3 SnO2.
Bremen blue or Bremen green (depending on how it is used, in oil or in water) consists mainly of copper oxide hydrate and is prepared by the action of caustic soda on copper oxychloride. With glue or qatar mobile database it is light blue, but with oil it soon becomes green, due to the formation of green copper soap.
Mountain or mineral blue (azurite, copper azure) is prepared by grinding azurite, a copper crystalline ore found in the Urals, Altai, in Chessy near Lyon and in composition representing a basic carbon-copper salt, 2CuCO3 Cu(OH)2.
Egyptian blue, a long-known blue paint for painting, is crushed copper glass. It is prepared by fusing sand with chalk, soda and copper oxide. Other names: frit blue, Alexandrian frit, Pompeian blue.
Oil blue (copper indigo, Bleu Horace Vernet), by composition - copper sulphide, CuS. It is prepared by fusing crushed metallic copper with sulphurous alkalis and leaching the fused mass. The small crystals of copper sulphide remaining undissolved in water are dried and crushed.
Lime or Neuwieder blue is prepared by precipitating a mixture of copper sulfate and ammonia solutions with lime milk. It consists of a mixture of copper oxide hydrate and gypsum, 5CaSO4 2H2O + 3Cu(OH)2.
Vivianite blue;
Azurite (verditer);
Prussian blue (Paris blue, Prussian blue, Antwerp blue);
Ultramarine (natural and artificial);
Smalt (royal blue, cobalt glass, schmalt) is potassium glass, colored dark blue with cobalt-potassium silicate. It is used for bluing paper, fabrics, starch, and also for coloring glass and porcelain;
Cobalt blue (Thénard blue, cobalt ultramarine, Leyden blue). Significantly stronger than ultramarine, as it hardly changes under the influence of alkalis and weak acids;
Indigo;
Ceruleum;
Phthalocyanine blue;
Manganese blue.
In smaller quantities, various blue copper paints are used, such as Bremen blue and mineral or mountain blue, Egyptian blue, oil blue or copper indigo and celestial blue. Azure or ultramarine, as well as Paris blue or Prussian blue, are used in industry and everyday life in significant quantities.
Sky blue (Bleu celeste) is a very beautiful, light blue color, and its composition is tin-cobalt salt CoSnO3 SnO2.
Bremen blue or Bremen green (depending on how it is used, in oil or in water) consists mainly of copper oxide hydrate and is prepared by the action of caustic soda on copper oxychloride. With glue or qatar mobile database it is light blue, but with oil it soon becomes green, due to the formation of green copper soap.
Mountain or mineral blue (azurite, copper azure) is prepared by grinding azurite, a copper crystalline ore found in the Urals, Altai, in Chessy near Lyon and in composition representing a basic carbon-copper salt, 2CuCO3 Cu(OH)2.
Egyptian blue, a long-known blue paint for painting, is crushed copper glass. It is prepared by fusing sand with chalk, soda and copper oxide. Other names: frit blue, Alexandrian frit, Pompeian blue.
Oil blue (copper indigo, Bleu Horace Vernet), by composition - copper sulphide, CuS. It is prepared by fusing crushed metallic copper with sulphurous alkalis and leaching the fused mass. The small crystals of copper sulphide remaining undissolved in water are dried and crushed.
Lime or Neuwieder blue is prepared by precipitating a mixture of copper sulfate and ammonia solutions with lime milk. It consists of a mixture of copper oxide hydrate and gypsum, 5CaSO4 2H2O + 3Cu(OH)2.