Setting inks/print

Web Heat-Set Publication and Commercial Inks. Almost all heat-set inks are now printed on web offset presses, and are based on vehicles containing synthetic resins and/or some natural resins. These are dissolved in hydrocarbon solvent fractions which are specially fractionated for use in the ink industry. They vary in boiling range between 180 and 300 °C. Small percentages of alkyd resins (qv) may be contained in these inks. They dry in less than one second by means of solvent evaporation in a heatset oven. These ovens utilize high velocity hot air to raise the web temperature to 120-150 °C. 

Low-Smoke Low-Odor Inks, Low-smsolvent-based heat-set inks currently used. These inks contain lower concentrations of solvents (e. g., 20% instead of 40%), with a smaller proportion of saturated hydrocaibon solvents and none of tiie photochemlcally-reactive solvents, yet have printing and ink-film properties typical of beat-set inks. Some of these inks contain exempt solvents (e. g., low-boiling azeotropic mixtures), some contain high-boiling co-solvents (e.g., long-chain alcohols), others contain emulsfiad water. 

Use General purpose colors for letterpress, gravure, flexographic, moisture-set, heat-set inks, especially for offset printing inks. 

When we foster ink/water contact with additives like isopropanol, we overcome chemical barriers to water-in-ink mixing. The mixing process may become as rapid as the printing process it becomes less dependent on details of ink and fountain solution chemistry, press settings and printing format. The process is easier to operate. We have introduced a measure of chemical automation. 

Caused by either moisture in the air or moisture already within the material being printed. This means that a solid (usually a resin) is made to precipitate out of a solution by moisture—hence the term moisture setting inks. 

These were initially produced for higher speed rotary letterpress printing using inks based on synthetic resins in high boiling point hydrocarbon solvents which are rapidly dried with heated rollers. Heat set inks are still widely used for web printing and involve newer resin and solvent systems. 

Chem. Descrip. Micronized synthetic wax CAS 8002-74-2 EINECS/ELINCS 232-315-6 Uses Rub resist, aid, abrasion resist, aid, slip agent in printing inks, esp. water- and alcohol-based flexo and gravure inks and web offset heat-set inks... 

Chem. Desap. Polyethylene waxes and PTFE Uses Lubricantforflexo, gravure web of L heat-set and quick-set sheetfed printing inks, UV and metal decorating printing inks, coil coatings, industrial paints or finishes and all types of overprint varnishes Features Provides exc. rub resist, and hardness can directly replace high priced PTFE powds. 

Wax set ink A printing ink designed to set and dry instantly upon immersion of the print in a bath of molten wax. 

Electric arc lamp was formerly a lamp whose light was produced by the ionisation of a gap between two carbon electrodes, the resulting electric arc across the gap producing light. It also has other uses such as the production of ultraviolet rays used in setting certain printing inks. 

To build a crude organism would require resolution at the scale of about 10 /u.m. Most current freeforming methods allow resolution down to about 100 /um and a limited materials set. Microcontact printing and related methods allow much higher resolution, down to about 1 /zm, but effectively are restricted to one layer. There is much current interest in ink-jet printing methods, which could provide the required 10-/um resolution while allowing many layers to be deposited. 

Screen printing inks Screen-process inks Screens Screw dislocation theory Scrip set Scrubbers... 

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