For Printing Inks,Inkjet Inks,White Board Maker Inks,Paints & Coatings.
SKYSPERSE/SKYJET Pigment Chips, also known as Pigment Preparations, are organic & inorganic pigments pre-dispersed in various resin systems such as nitrocellulose, water-based acrylic co-polymers, polyamides, vinyl co-polymers, Acrylic co-polymers, CAB, PVB and CAP resins for the applications in producing high quality flexographic and rotogravure printing inks as well as white board marker inks, digital printing inks ,UV curing inks and coatings, automotive refinishes, paints, lacquers and coating.
In addition to our line of pigment chips, our SKYJET pigment chips are state-of-the-art pigment chips that offer ultra fine nano & sub-nano particle size for the applications of ECO & Solvent based ink jet inks.
With the advanced technology from North America, SKYSCHEM is dedicated in developing and producing high performance pigment preparations. By heavy investment in industries, SKYCHEM has established itself as the leading pigment chips producers in China. Our products have been exported worldwide.
Traditionally, dry pigment powder is the form of supply to the ink and coating makers. However, the use of pigment chips and pastes by both ink and coating makers has grown at a very rapid rate over the last few years.
The main reasons are as follows:
SKYSPERSE/SKYJET pigment chips are produced by our specialized milling technology which provides high shear dispersion process that affords maximum colour strength, transparency, gloss and outstanding good rheology.
Pigment Chips give the color formulator more flexibility and versatility due to the improvement in color transparency and cleanliness as well as the dust free handling properties.
Pigmented Chips are pre-dispersed and do not require any further grinding. Production cost savings of inks and coatings can be realized through the use of Pigment Chips by reducing the labor costs, minimizing equipment investment, reducing inventory cost, increasing capacity constraints, reducing yield losses and streamlining production processes.
SKYSPERSE/SKYJET pigmented chips create great chances for small ink & coating producers to produce excellent quality end products without much technology and equipment investment.
Ink makers can have the maximum flexibility of adjusting ink formulations by using pigment chips because they can be directly incorporated into their ink formulations without the milling process.
Packaging industries require high quality printing inks as they will affect the quality of the final products. To produce high quality liquid inks, the most important factor is the dispersion of pigment in the ink. In other words, ink's quality depends on the particle size of pigment and the purity of the colors in the inks printed on the packaging film. Therefore, ink makers are trying to get know-how and facilities in order to improve the purity of the colors.
Because of the mill machines' limit, it is difficult to get pigments fully dispersed if only using three-roll machines to produce liquid inks. However, inks made from pigment chips can give excellent transparency and purity superior to traditional inks.
Traditional ink production system is generating solvent evaporation with bad odor. Besides, it has a demerit for some certain colors with dispersion. Even though the demand for packaging inks was increasing,ink industry had not been successful in solving the problem.
Moreover, pigmented chips have more advantages in respect of the qualities of ink and product loss.
There are some outstanding merits of chip inks:
1.Clear Printing Colors
As chip inks are treated completely with the dispersion and processing, degree of high speed and continuous printing is excellent and the printing colors are clear because of the excellence of color revelation. And the qualities are good at the photo printing.
2.Excellent Gloss & Higher Strength
The pigment chips usually improve color strength and gloss more than 10%.
3.Finer Blocking Resistance Than Traditional Inks
The production system of efficiency and stability with the specific character of chip ink is also good to block resistance, with a high degree of adhesion power, laminating, stability of storage and a trouble free of any static electricity.
4.Less Residual Solvent Than Traditional Inks
Quantity of solvent residue is reduced to about 1/3-1/4 than traditional solvent inks.
5.Better Adhesion & Laminating
Because of the improved flexibility, adhesion strength is excellent both for printing and laminating processing.
6.Excellent Solvent Resistance
Not only the phase of bleeding by solvents(Tol/ M.E.K/E.A)to be used for anchor coat agent and adhesion but also the bleeding to the next unit when printing is improved.
7.Excellent Storage Stability
The stability of the quality not being come to the gel on low temperature(-10n)<8>8.No Static Electricity
Most ink makers think the cost of chip inks much higher than the conventional inks made from powder pigments.The reason is that they only think of the raw material price and cost.Actually,chip inks can be more competitive in the total production cost and their quality is superior to that of the conventional inks. The following table shows the comparion of the conventional inks & chip inks.
To achieve the maximum quality, some dissolving techniques are required. The use of low energy agitators or the traditional sweat-in technique in which chips are soaked in diluents are NOT recommended due to low resulting quality and long equipment tie-ups respectively.
A Mid-high speed stirrer is indispensable for cutting the pigmented chips. Vessel diameter should be 2.5-3 times of the blade diameter and the height of stirrer should be 1/3 of the blade or stirrer diameter from the bottom of the vessel.
A good starting formula for dissolving the chips would compose 30% pigment chips plus 70% solvents. As the experience dictates, the ratio can be modified since the viscosity and concentration of the final paste depends on the concentration of pigmented chips and the type of binders and solvent.
Acrylic pigment chips is different in formula. If water is to be used as the primary solving medium, a good starting composition of 86% water,8% ammonium hydroxide and 6% isopropanol should be introduced to the vessel.
For baking finishes, some higher boiling amines such as dimethylethanol amine should replace ammonium hydroxide. The acrylic pigmented chip should be added to the starting point diluents under high agitation with the PH of 8-9 for total resin solubility. If other water reducible resin is to be added to the concentrate solution, more amine should be included for solubility.
Existing high-speed stirrers with saw tooth blade. Speed of blade tip should reach 1000-1500 meter per min. A stirrer with 40cm diameter with 1100-1440 RPM is suitable.
Vessel diameter=3×blade or stirrer diameter(approx. But not more).These conditions ensure the good mixing without any dead spots.
Within 60 minutes.
⑴Under agitation charge the majority of solvents to the mixing tank(low shear-400 to 600rpm).Hold out 10 to 20% of the solvent for viscosity adjustment after all the chip is dissolved.
⑵Under good agitation(1000rpm) with the impeller in the centre of the tank introduce the pigmented chips into vortex. After adding the chips, speed should be
adjusted to 2000rpm to keep chip under constant movement in tank.
⑶AS the pigmented chip dissolves and viscosity in creases, speed and blade height should be adjusted to keep the good movement in tank.
⑷When a semi-fluid paste is apparent, the disperser should be stopped and mixing tank scraped carefully for the undissolved chips.
⑸After scraping, shift the blade off centre 1/2-1 blade diameter in order to use optimum laminar flow produced by the blade configuraton.
⑹After all the chip has been dissolved let down with remainder of solvent under good agitation and run 5-10 min for complete mixing.