Main properties
Milori blue pigment is resistant to solvents and mineral acids; it is only destructed when being boiled with concentric H2SO4 and decomposed under the action of even weak alkalis by forming iron hydroxide and potassium ferrocyanide. For this reason, milori must not be used in emulsion and limewater colors, for painting over plastering or concrete as well as in mixture with pigments, fillers and film formers having alkaline reaction. When being used in mixture with white zinc, the pigment gets greenish tint.
When being treated with water solutions of oxalic and tartaric acids as well as solutions of ferrocyanides, colloid solutions known as soluble ferric ferrocyanide are formed.
In thin layers, the pigment glazes, has very high coloring power close to that of organic pigments. Light blue sorts of the pigment have finer dispersion and higher coloring power in comparison with dark blue ones.
Ferrocyanide (milori) blue pigment is featured by weather and light resistance, does not worsen the corrosion resistance of the coatings, but is not resistant to heating: the color varies at temperatures of 160-240°C (depending on film former).
When being mixed with lead and zinc chrome pigments, the blue pigment forms a rich gamma of lead and zinc greens colored from bright green to olive green depending on the quality and quantity of taken components.
Sphere of application
Ferrocyanide blue is used in paint-and-varnish industry to produce paints and enamels of various types in mixture with hiding pigment (more commonly, with pigmental TiO2) and fillers.
It is commonly used in printing industry in the form of printing colors of various kinds.