Introduction to ink and its main ingredients

Ink should have a certain amount of fluidity, and meet the nature required by a variety of printing process, can quickly dry on the print, dry ink film should have a variety of water, acid, alkali, light, rub, wear and other resistance.
liquid components in the ink composition are called connecting materials, solids are colorants (pigments or dyes) and various additives.
For inks, color, body bone (usually thinness, fluidity and other ink fluidity properties called ink bones) and drying performance are the three most important properties of ink, but also the development of ink formulations and processes and production of
ink should be noted
Master the deployment of spot-color ink, ink quantity control, the full use of leftover ink, not only can save materials, but also personal quality, technical level will be correspondingly improved. An excellent ink adjuster plays an important role in the development of new inks, color innovation and the reduction of ink costs.
Main Ingredients
Coloring Materials
including pigments and dyes, pigments divided into organic pigments and inorganic pigments, the former bright colors, strong coloring force, short drying time, so in the ink application is wide, such as acens, indistinct pigments; Pigments are colored in a particulate state and do not dissolve, and are the most commonly used colors in inks. The dye is used in a solution, molecular coloring, the effect is not as good as pigments. The color material can give the ink different color and color concentration, and make the ink have a certain viscosity and dryness.
In connection material
is one of the main components of ink, the media role of dispersing color and auxiliary materials, is a small amount of natural resins, synthetic resins, cellulose, rubber derivatives, etc. dissolved in dry oil or solvent. There is a certain amount of fluidity, so that the ink after printing to form a uniform thin layer, dry after the formation of a certain strength of the film layer, and pigment protection, making it difficult to fall off.
Connecting materials on ink delivery, brightness, fasting speed and other printing suitability and printing effect has a great impact, therefore, the selection of suitable connecting materials is one of the key to ensure good printing, according to packaging materials, printing requirements, etc. , at any time to adjust the composition and ratio of the connecting materials.
Auxiliary Ingredient
Filler
it is an additive to regulate ink concentration, but also increases the thickness of the ink film layer, improve its wear resistance, it does not have coloring and cover. Mainly nihil sulfate, talcum powder, calcium carbonate, aluminum hydroxide, etc. , when used, it was shredded into white powder.
thinner
its role is to reduce ink viscosity, prevent the occurrence of film peeling phenomenon, so that the ink has the suitable operation. Commonly used thinners are low-polymer linen oil, mineral oil, etc. The former is easy to mix with ink, the effect is soft, the latter dilution effect is obvious, but avoid excessive, otherwise the printing effect is not good.
anti-
its role is to inhibit the drying speed of the ink, to prevent the ink on the mechanical drying of conjunctivation. Its main ingredients are organic reducing agents and antioxidants. It can be added to the ink or scattered on machinery that touches the ink.
anti-printing agent
its role is to prevent the printing ink layer backprinted to the back of the paper to ensure the quality of printing. The most commonly used anti-printing agent is corn starch.
the anti-slip agent
its role is to improve the ink friction resistance and fluidity, reduce viscosity, improve the finish of the film layer, reduce the phenomenon of paper hair pulling. The slippers commonly used in inks include microcrystalline waxes with high melting points, synthetic waxes, etc.
other additives
many other additives, such as dispersants, moisturizers, desiccants, stabilizers, etc.
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