Pigment ink is made of particles dispersion, its minimum size (particle size) than the Dye ink (Dye base ink) of the molecule diameter is much bigger, to nanometers to microns, so really nanoscale is transparent liquid, micron level exists in the form of opaque liquid at ordinary times. Used in the manufacture of paint, ink pigment particle size can be divided into nanometer level and micro level, the nanoscale particle size average (LD50) in 40-125 nanometer, maximum particle size (LD90) shall not exceed 180 nanometers, micronstructured particle size 0.125 0.300 micron. Pigment for digital inkjet ink is divided into two nano and micro level, the general Japanese inkjet printer nozzle 43 microns in diameter, so the pigment ink jet used by the pigment particle size requirements for nanoscale, production of outdoor inkjet printers and other countries, such as the UK (including most domestic outdoor printer) XAAR, USA/Canada production spectra printer, etc., the nozzle in 53-63 microns in diameter, the pigment ink particle size requirements in 0.25 to 0.35 microns.

There are technical ability development and production of inkjet manufacturers are few and far between, because the ink-jet printer manufacturers are not capable of producing the nozzle, so a machine brands use the same brand is not necessarily a set of spray nozzle, they can use different brands in different models of the nozzle. Digital ink jet printers brand market at present is a dime a dozen, but users should ignore brand machine, just look at nozzle of the brand Can know to be able to use the pigment ink particle size level is the nano or micro level.

Use the micron grade pigment ink jet nozzle, of course, can use nanoscale pigment ink-jet, greatly because of the ink pigment particle size is smaller than the machine design requirements for particle size. But using nanoscale pigment ink-jet printer, if the micron grade pigment ink jet to the system, inevitably, will soon be cause nozzle clogging.

Pigment ink image point, dispersing pigments powder solid ink, of course, this is just a kind of image, and not accurate enough. Accurate to say that it is a solid colour material grinding into very small particles, using the dispersant dispersion in water and/or organic solvent, is a kind of suspension/dispersed solution or half solution, pigment properties of printing and dyeing clothing with us also. With dye ink seep into the medium Child gap between precipitation and then form the principle of color exactly the opposite, it is through the colorants (paint) in the physical form (using polymer as binder) attached to the surface of the medium (such as copy paper or printing material, etc.) after the color. Therefore, under the influence of corrosion in the chemical or physical first would only damage the molecular structure of the outermost layer, the inside of the structure is not easy to damage, in the outer layer of the molecules are after the destruction, will appear fade phenomenon such as.

For printing color, because the pigment particles in the ink layer is arranged on the surface color can't be fully formed when there are rules of lined up, cause a layer for the incident light reflection Angle is not parallel, which reduces the color reflected light scattering and color saturation. Will make it not very good show the color and brilliance of colour, even on the flat surface of paper such as cap paper printing can't print out full and has a high colour images, this is why the general with pigment ink printed things because of its color saturation feels a bit poor.

Choose the pigment dispersant to form stable high dispersion system, and choose to have high stability/wettability and suitable hardness/stretch/high gloss and high polymer as a link, and reasonable formula ratio, make the pigment in the bearing surfaces have rules, so that the incident light reflection form parallel reflection, can obtain high gloss surface, and effectively improve the color saturation degree, vividness and weathering resistance to light, rubbing fastness.