Pigment Carbon Black for printing inks are used in UV/EB-curing inks, news ink, screen print inks, flexographic inks, publication gravure inks and lithographic inks.
They offer various levels of optical density and undertone, easy dispersing with high optical density and good hold-out, excellent coloristic properties and rheology, and an excellent balance of properties for sharp imaging and optimum gloss.
The most important features are the size and structure of the primary pigment particles and their aggregates. Beyond color properties, different grades of pigment blacks offer different rheological properties which must be matched to the binder systems.
Simple relationships can be defined between the primary particle size and structure of the pigment and final ink properties. For film thicknesses below 10 microns (typical for printing inks), the following relationships are valid:
- The lower the primary particle size, the higher the optical density of the ink film.
- The lower the primary particle size, the more brownish the undertone of the print.
- The lower the primary particle size, the higher the viscosity of the printing ink.
- The more structured the Pigment Carbon Black, the higher the viscosity of the printing ink.
- The more structured the Pigment Carbon Black, the better the dispensability.
- The more structured the Pigment Carbon Black, the better the hold-out but also the lower the gloss of the ink film.
Pigment Carbons Black for Inkjet Inks and Toner.
Pigment Carbon black based inkjet inks have assumed leading market positions in desktop as well as wide-format inkjet printing since they provide outstanding light and water fastness as well as superior optical densities. Beilum Carbon Black have become the state of the art in inkjet ink pigments.
Irrespective of the print head technology, they allow the formulation of inkjet inks to meet the highest requirements in today´s home, office and commercial inkjet printers.
The selection of Carbon Black Pigment allows for controlling the tribo-charge as well as modifying the elasticity of the binder resin. Through adjustment of the binder elasticity, both grindability and fixing behavior of the toner can be optimized. This results in higher throughput rate in the milling process as well as a broader window for the fusing process.