linseed oil) the first step in the drying process is absorption (ink setting). When the vehicle consists of organic oil (e.g. Hot air or infrared dryers (IR dryers) can be used. alcohols, esters, or ketones) the vehicle is dried by evaporation. When the ink vehicle consists of water or organic solvents (e.g. Depending on the printing method, the fluent ink vehicle can be dried either by evaporation or by chemical change as follows: There is an important connection between the absorption and drying processes. A pH level of 5 is too low to be optimal. Normally a pH level between 6 and 8 is required. The correct level of pH is important for the ink-drying process. If the absorption is too slow, there is a risk of set-off. If too much pigment is absorbed this leads to less bright color reproduction.
Ink absorption is the ability of the paperboard surface to absorb ink optimally. The printing and varnishing results depend greatly on both the baseboard and the coating having very uniform absorption and drying characteristics. Good absorption and drying properties come from the use of virgin fibers, the formation and treatment of the baseboard, and the coating properties (quality, formulation, application method, smoothness, and finishing). Both are strongly influenced by the constituents of the coating and the uniformity of the coating characteristics. The measurable properties normally related to absorption and drying are ink absorption and surface pH.
The absorption and drying properties of paperboard are crucial for achieving a perfect result when printing and varnishing. Furthermore, ABS offers a broad processing window with resins tailored for plastic extrusion manufacture, injection molding, sheet extrusion and coextrusion, plating, roto molding, compression, cold forming, and blow molding.Ībsolute Humidity: The actual weight of water vapor contained in a unit volume or weight of air.Ībsorbent: a substance that can retain other substances when in high relative humidity atmospheres.Ībsorption and Drying: Absorption is the property that causes a material to absorb liquids or vapors in contact with paper. ABS is often used for refrigerator door liners, interior automotive trims, and housings for business machines, small appliances, telephones, and other consumer electronics. The plastic product has excellent surface appearance, strength and stiffness, toughness and chemical resistance, as well as processing ease and versatility. ABS extrusions are mainly used for indoor purposes. It is one of the most widely used engineering thermoplastics. Also called scuff or rub resistance.Ībrasion Test: A test designed to determine the ability to withstand the effects of rubbing and scuffing.Ībrasiveness: That property of a substance that causes it to wear or scratch other surfaces.ĪBS: Acrylonitrile Butadiene Styrene is a thermoplastic copolymer that can withstand high temperatures and has good adhesive properties. Can be partially removed by swabbing with alcohol.Ībrasion Resistance: Ability to withstand the effects of repeated rubbing and scuffing. The damage caused by friction such as rubbing, scuffing, or scratching.Ībrasion Marks: Marks on a photographic print or film appearing as streaks or scratches, caused by the condition of the developer.
Scuffing of a package against external surfaces. AĪbrasion: Scuffing or wearing of a part against its package or vice versa.
SLITTERHEAD SLUR PC
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SLITTERHEAD SLUR FOR MAC
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