So-called ink concentration is the ink tinting strength, it is reflecting the ink dispersion and the ink pigment content in the size of a commonly known as.That is to say, the higher the degree of pigment dispersion, the higher the ink concentration;In the ink pigment content is higher, its concentration.In addition to determine ink pigment concentration, connecting material, fillers and additives, etc., to a certain extent, also affects the concentration of ink.Production process shows that the ink concentration is one of important indexes that influence the printing quality, so the correct understanding and several factors related to the concentration of ink, to control the printing process production technology, improve the quality of printing products is of great significance.
Ink is hydrophobic colloid, it is composed of pigment, links, fillers and additives such as components of homogeneous mixture.Pigment is coloring matter, have the effect of color in the ink.It is a kind of insoluble in water and insoluble in link, but can be spread evenly non-ferrous material in the link of material for solid powder.The size of the ink pigment content in determines the durability and the concentration of ink, also affect the ink drying performance.As the main color of paint material, about the quality of the ink, the influence of eligibility play a decisive role.So, for printing, only fine pigment particles, oil absorption, the proportion of small, small covering capacity, tinting strength is strong, good stability, less color, bright colors, and heat, light and resistant to acid and alkali resistance and other good performance, the printing quality of the ink to get good quality effect.According to the properties and chemical compositions of the pigment, the pigment is divided into two kinds of inorganic pigments and organic pigments.Inorganic pigments including all kinds of metal oxides, chromate, carbonate, sulfate, and sulfide, etc., such as aluminum powder, copper powder, carbon black, titanium white and white all belong to the category of inorganic pigment.Inorganic pigment has good light resistance, heat resistance, and than the big, covering power is strong, but I don't adapt to the polychromatic, high-speed printing requirements.The commonly used organic pigments including color pigment and color lake pigment.Chromogen pigment mainly include: phthalocyanine pigment, nitroso pigment, azo pigments and reduction, etc.Lake pigments are: alkaline lake, azo dye lake lake pigments and acid dyes, etc.The vast majority of organic pigment has good tinting strength, light weight, small particles, soft texture, bright color and the concentration higher advantages, is the main raw material for the color ink.Link is a major part for printing ink, it is a raw material for making ink fluid has certain viscosity, it will play a powdered pigments such as solid particle mixing together, and make the adhesion of paint transfer and adhesion on the printing quality, at the same time make the print gloss.Its colour and lustre, tension, viscosity, water resistance, dry, and so on are the important factors influencing the performance of ink, its dosage size, are also the important condition of change ink liquidity and concentration.And filling material is a kind of small, white powder solid matter, so that uniform and well dispersed in the links of material.Such as potassium, magnesium carbonate, calcium carbonate and hydroxide belong to filling material, they rise to adjust the ink in the ink, ink, consistency, and the effect of concentration.Link using pigment inks, filling, filling material with a certain amount of matching processing into finished products after printing ink, often because of the different printing conditions, the original ink rare stiff, shade and dry, not necessarily to be able to adapt to all kinds of conditions, such as the generally should undertake adjustment by using some additives, such as adhesion agent, adhesive, dry oil, light and the light oil, etc., these additives added to ink, will also change the concentration of ink.
Ink concentration is large, the consistency is also big, therefore, the size of the ink concentration, determines the extent of ink hue.When the concentration of ink big, the printing color slants deep;On the other hand, the printing color slants shallow.Concentration of large amount of ink in printing ink quantity is relatively small, ink quality is better also.On the other hand, the concentration of the small amount of ink used in printing inks for the relatively more, inky is relatively light.In printing ink concentration size large area chart products, the performance of the printing effect is particularly prominent.Visible, ink concentration conditions directly affect the printing quality of products, so, in the fine printing fine line or lines of products, generally should choose concentration of ink to print, the printing field layout of a few low concentration of the product is suitable for use of ink to print.Because the ink has thixotropy "side, when printing the environment temperature is high, the machine speed, ink, heat is thinning its concentration will decline, this requires a slightly higher concentration of printing ink to printing, can better guarantee the quality of products as required.On the other hand, it can choose concentration lower ink to printing.
If the concentration of small color printing ink used for printing or stack of color chart, have to screen cloth is increased by the ink to achieve the required amount of printing color, but it's so easy to make our products happened at the end of ills.Based on this situation, the color printing ink used in the product generally take some deep adjust its hue appropriate, concentration and the appropriate bigger, the printing effect is good, and is advantageous to the adhesion of printing quality.In addition, the printing area of the field edition, line edition or version checker, printing speed corresponding to adjust slowly, in order to reduce the coefficient of friction and heat in the process of printing, prevent because of temperature increases too fast, make the ink is easy to loose liquidity increases and results in a decreased concentration, the printing ink becomes shallow ills.
Technology practice, analysis shows that the original ink is not available, its concentration is constant, however, in use process, with consistency and liquidity of mutation, concentration change.Printing speed, temperature, and amount of education version fluid condition such as size changes, affect the concentration of ink.If the layout of water in the process of printing is too big, also can make the ink concentration is diluted, make the print ink appears pale.Visible, ink concentration is variability factors affecting the quality of products as required, therefore, correct understanding and knowledge in relation to a number of ink concentration and take corresponding measures to print, to ensure the quality of the printing ink, has very important significance.
(Gold Printing Group) |
