Cobalt Oxide;using Ceramic glaze composition inside %0.01 and %6 ,this is pigment but also very hart pigment fot this reason so it should be grinding very well.Cobalt oxide is very expensive pigment
Cobalt Oxide; It is a coloring dye (pigment) commonly used for blue and toning in ceramic glazes. It is used in different proportions (between 0.01% and 6%) depending on the color of the desired glaze and the glaze composition. Since cobalt oxide has a hard structure, it prevents particles from remaining on the glaze surface, called oinhol. It needs to be ground well as it creates fine holes. The grinding process can be used in different roller grinders as it is generally done in ball mills. Since the price of cobalt oxide moves according to the metal exchange, its price increases excessively from time to time. Cobal oxide is imported from many countries, especially the People's Republic of China.
Cobal oxide is widely used, especially in tile and ceramic production, when dark blue tones are desired, and compared to other dyes, it has the highest price, along with red and lilac. It is commercially sold in 25 kg bags, but due to its high price, workshops prefer to purchase it per kg.
Cobalt oxide appears in different tones depending on the characteristics of the glaze (glaze) to which it is added. Because some raw materials have the ability to support or absorb some oxides, so it is best to try Cobalt oxide in different glaze compositions to get the most vibrant color.
Cobalt Oxide, used as a strong blue color source, is used as a colorant and color adjuster in glazes and glasses. Since it has a hard structure, it is recommended to be ground in a mill.
Cobalt oxide is used as a very strong colorant to obtain blue tones.
However, since it has a very hard structure, it must be ground very well and used.
Its composition with phosphate and arsenate gives bluish, lilac, dark lilac, and green colors with titanium additive.
Increasing zinc oxide and magnesium oxide in glaze compositions increases the painting power and effect of cobalt oxide.
The colors become brighter and more beautiful.
The highest contribution rate in glazes is approximately 6%. If the ratio increases, the color of the glaze changes from dark blue to black.
If the amount of additive increases, foaming will occur in the glaze and cause pinhole errors on the glaze surface due to oxygen release.
Cobalt oxide is also used as a good crystal former in crystal glazes.
In glazes, it creates all shades of blue, from light blue to dark blue.
Since it is very hard, it must be ground very well. Otherwise it won't dissolve in the glaze.
In cobalt oxide glaze, the addition of 1-2% CoO creates a blue color, the addition of 2-4% CoO creates a dark blue color, and more than 6% creates a black color.
It gives a lively and bright appearance in leaded and alkaline glazes.