In general, the colors are fixed on the print more ways, namely: 1. by soaking 2. due to evaporation of the solvent, 3. by film-forming chemical (oxidative polymerization or curing it) 4. through a combination of all the above methods. As a rule, in the case of sheet offset printing ink binding occurs due to absorption and evaporation of the solvent (in the case of the different types of paper and cardboard) or by chemical film formation (in the case of metallized paper, self-adhesive film and non-absorbent mother Alami). Each manufacturer makes recommendations but the use of paints based method of fixing them, a certain composition of the binder. To print products by offset printing in the printer uses only special offset inks or paints for general purposes, if their name or in technical terms to reflect the application of offset printing.
For four-color process colors used colors: cyan, magenta, yellow and black, which provide the desired range of colors and shades of color separation in the corresponding originals. For making spot color mixing systems are used 'Rainbow' or 'Panton' recipe for weight ratios of mixed component that allows to reproduce the desired color when printing. Each swatch colors in the catalog equipped with its formulary table. The correct choice of paper, determined the optimal level of physical, technical, and print properties, preparation of paper for printing, as well as compliance with the conditions of its storage in many ways determine the quality of the publication. Major defects and malfunctions in offset printing due to the properties of paper. For the correct orientation in the range of printed paper and the exact choice of paper for publication is required following information: – the manufacturer or seller of appointment paper for printing method and type of printed output – weight of 1 sq. km. m Paper – white paper – the existence (absence) of a mechanical (wood) in the mass part of the paper – the existence (absence) of the Cretaceous cover – the degree of surface finish for uncoated paper, standard or enhanced smoothness smoothness – the degree of surface finish for coated paper, (Gloss or matte); Choose papers for publication based on the following factors: – Publication design – technology issue – the level of image and print quality requirements – a term indicative of possible exploitation Publishing – commercial viability.