Additives can speed up the production of print jobs without the need to add slip sheets to prevent the prints from sticking or to perform aqueous glazing. Printing workshop • Press: Heidelberg's 40-inch Speedmaster press with a print speed of 7,000 sph. · Plate: Diamond Western Litho, with 175 lpi screens, with a 4% tone jump in the middle. · Ink: INX OSF Vision Plus four-color ink. · Printing color sequence: black, product, blue, yellow. · Neenah Classic Crest non-coated cover sheet. Due to the higher acidity of this paper, it usually takes 2-3 days to complete the drying. · Tomahawk Cool White felt paper, which is a kind of granular soft paper, suitable for printing limited art prints. Landis said that because of its greater absorption, it requires more ink. Sappi Somerset Matte Paper, Landis noted that this paper contains more kaolin, like coated paper, but it can also be used because of its higher acidity. · Transilwrap Tipped Polyester plastic paper. Landis said that the material was first affixed with a backing paper, and when it was cut during the finishing process, the backing paper would fall off. This material is suitable for light boxes, soda machines and so on.
The hand is the second face of a woman, from the hand can judge a woman's identity, cultivation and life quality. If you don't care carefully, others will see the signs of time from your hands. And the foot is a microcosm of the human body, and more and more people have been working with facial care.
We only have very few sebaceous glands on the backs of our hands, so it's easy to dry out, and it's a smart woman's idea to keep hand cream handy. Apply it every time you wash your hands to replenish moisture and nutrients. You can use all the high-quality hand protection products that are commonly available on the market. This does not mean that you can use them freely. If the back of the hand is tight and there are small fine lines, it is necessary to choose mild products, such as those containing glycerin, mineral oil, lanolin and other moisturizing ingredients. If you find yourself with itchy, peeling skin, look for products that contain soothing ingredients like mint and chamomile and moisturizing ingredients like minerals and glycerin. The best time to care is also in the evening, before going to bed with almond cream hand cream, then wear a pair of thin plastic gloves, better for the skin to absorb nutrients.
For decades, printing companies have been looking for ways to accelerate ink drying. Many people try to add desiccants, specialty inks, and waterborne varnish to the ink.
Speedy Dry, a company located in NC, USA, is a company specializing in the production of ink additives that can speed up cross-link curing reactions during ink drying. SpeedyDry ink additives are suitable for traditional offset printing inks and can be printed on a variety of substrates, even on plastics. This additive has been put into production for more than four years.
GATF broke this situation
Independent testing conducted by the US GATF showed that SpeedyDry can significantly reduce ink drying time without significant impact on print quality and ink properties such as tone reproduction and ink viscosity. In addition, GATF also reported that SpeedyDry can improve the ink's anti-friction ability. The test conditions are as follows:
· Print shop: The temperature is 70.5 degrees Fahrenheit; the humidity is 45%.
In the GATF laboratory, an independent test was performed on highly textured reflective blue ink on Yupo synthetic paper. The results showed that in the absence of the SpeedyDry additive, the sheet drying time was 12.1 hours. If 5% of additive is added, the drying time will be reduced to 6.7 hours, and when 20% of desiccant is added, it will be decreased to 2.9 hours.
It usually takes 2-3 weeks for the printer to master the ratio. Frank Kocialski, director of printing at Colorado Litho in the United Kingdom, said: “We print on uncoated paper with a purely reflective blue ink with SpeedyDry ink additive, and we can polish and cut in an hour and a half. Many salespeople and The operator of the cutting machine is very happy for this."
Material properties
Shane Landis is one of the founders of SpeedyDry. He has 25 years of experience in press operations. He participated in the development and testing of the additive. The tested substrates include:
· Sappi Magnostar coated paper. Due to the small surface porosity of this paper, Landis noted that it requires only a small amount of ink and water during the printing process.
(to be continued)
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