In the printing industry, we must know that the final product is a printed copy based on visual impressions. Judgment of subjective vision is inevitable, because most of the reproduction is no longer a copy of the original. Although some aspects of the relationship between the original and the copy can be expressed in a measured manner, this cannot be used as an indication of the overall acceptability of the copy. Therefore, in addition to measurement, visual judgment becomes the basic requirement of most color reproduction systems, and this requirement can be achieved by color drafting. It is important that the drafting should simulate the final printing effect as accurately as possible. This is essential for a successful color reproduction system.
Definition of standard drafting
A color sample that accurately reflects the final printing production, so the closer the equipment and materials used for making the manuscript to the printing production, the more effective it is.
The relationship between drafting and printing
From a production point of view, color printing is a process based on the principle of dot color rendering, and production requires strict precision and stable repeatability. However, there are many factors that affect the printing color, such as paper characteristics, ink thickness, printing pressure, air humidity, and even the quality of plate making. Each increase or decrease of factors will affect the quality of printed colors.
Generally speaking, drafting provides the following three functions: First, it is used to check the effect of color separation and plate making to determine whether the color of the picture is processed correctly, and provide a basis for revision. Second, it is used to check the technical requirements of film registration, dot expansion value, etc., as a reference for actual printing. Third, as a communication tool, give customers a signature to confirm before printing, and as the standard for future receipts.
Ningbo Honor Imp & Exp Co.,Ltd , https://www.honorhousehold.com