Techniques for manufacturing cobalt blue, the chemically pure salt of cobalt and aluminum oxide, were developed in 1802. The earliest modern history of cobalt aluminate pigments commences with Leithner in Vienna who appears to have discovered the basic process of calcining cobalt oxide and alumina (aluminum oxide) in 1775. Cobalt salts were first identified in the eighteenth century. Probably it contains nickel and zinc, which were found by x-ray spectroscopy. The spinel phase has a much lower cobalt/aluminum ratio than modern cobalt blue pigments. Origin and HistoryĬobalt aluminate is identified as the blue pigment on 30 polychromic shards of the 18th dynasty from Theben and Tell el Amarna. Conforms to ASTM D-4236.įor a detailed explanation of the terms in the table above, please visit Composition and Permanence. Do this by avoiding ingestion, excessive skin contact, and inhalation of spraying mists, sanding dusts and vapors from heating. Always protect yourself against potentially unknown chronic hazards of this and other chemical products by keeping them out of your body. There are no acute or known chronic health hazards associated with the anticipated use of this product (most chemicals are not fully tested for chronic toxicity). Spanish: cobalto espinela de aluminato azules Typical applications (non-inclusive) are liquid and powder coatings, inks, dispersions, concrete, plastics, and other applications where equivalent pigment chemistry is used. It is compatible with most resin systems and polymers and is non-warping. It has exceptional durability and hiding power and is generally used in applications where resistance to heat, light, and weather are needed. They have excellent chemical and heat stability and can be used in chemically aggressive environments and exterior durable applications without color fade.Ĭobalt aluminate blue pigment has good ultraviolet and visible light opacity is chemically inert, heat resistant, and stable to ultraviolet light. Cobalt blue pigments are the most durable blue pigments commercially available. It may include any one or more modifiers MgO, ZnO, Li 2O and/or TiO 2. Raccolta metalli.Cobalt Aluminate Blue pigment is cobalt aluminate blue spinel (CoAl 2O 4) is produced by calcining, at high temperature, a mixture of cobalt (II) oxide, and aluminum (III) oxide in varied ratios forming an interdiffused crystalline spinel. Controlla le linee guida minicipali locali. Cobra can be used in conjunction with traditional oils and when mixed at a ratio of Cobra 4:1, the mixture will retain its ability to be thinned and cleaned with water. Includes 32 mono-pigmented colours, including ten colours based on highly exclusive pigments, such as cadmiums, cobalt and chromium oxides.Available in 70 transparent, semi-transparent, semi-opaque and opaque colours with the highest degree of lightfastness (+++).Ground multiple times on a triple roller mill during the production process to create an artists’ quality fineness.Created with only the very best pigments and oils.Cobra Artist is an artists' quality oil paint with an exceptionally high degree of pigmentation. Cobra Artist oil colour in Cobalt Blue 511 is a semi-opaque colour with excellent lightfastness (+++).Ĭobra Artist is a water-mixable oil paint that offers the same fantastic results as traditional oil paints, without having to use harmful solvents.
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