Paint has dual role being both decorative and protective. Though usually decorative for
interiors, paint's protective features are combined externally in the protection of vulnerable
materials such as softwood and metal.
Most paint is made from three basic ingredients: 1 Pigment - provides color and opacity 2 Binder- acts like a glue in holding the pigment to the surface 3 Solvent - maintains the pigment and binder in liquid form Pigments are used to do different jobs in paint including helping to give the film the required
properties (Extending pigment) and to increase the impermeability of the film (Barrier pigment),
but the foremost is the one providing the permanent color (Coloring pigment).
Pigments are either 'organic' or 'inorganic'. Unless used in quantity, Coloured pigments do not
provide opacity so most paints rely on their including titanium dioxide. • 'Organic'. Early organic pigments were based on dyestuffs derived from natural plants. Most
contemporary organic pigments are synthesized from coal tar and petroleum distillates, but plant-based pigments continue to feature 'ecol' paint brands. Synthetic organic pigments are usually
quite brilliant and have good color strength. However, opacity tends to be low and many organics
are not fully solvent resistant. • 'Inorganic'. The earliest paints used pigments which were obtained by digging certain minerals
out of the earth and grinding them to a fine powder. These 'natural' pigments are all inorganic
compounds. Typical examples include ocher and sienna. Other inorganic and more prolific pigm
ents in the market are usually metallic oxides derived from iron and clay or synthetics produced
1, Automobile coatings: When mixed with aluminum pigments and pearl powder, it becomes
golden yellow, and when matched with transparent organic pigments it can bring up different
colors of transparent paints in oil and water systems. 2, Wood coatings: Transparent iron oxide with soft and invariant color is widely used in wood
dyeing, because it can prevent ultraviolet damage to the wood. 3, Industrial coatings: Transparent iron oxide is widely used in metal surface coatings. It prese
nts the effect of gold or coppery color and is quite suitable for inner and outer coatings of pack
aging tins. 4, Printing inks: The brightly transparent color is applied in the printing of aluminum foil. 5, Artistic coatings: It can keep the color for a long period of time. 6, Plastic package: It can be made into cans and bottles when used in PET or PP plastic.
7.Cosmetic:It is suitable for cosmetic because of the nontoxicity and ability of absorbing UV-light.
8.Powder coatings:There is no color change within five to twenty minutes when the temperature
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