Packaging box manufacturers tell you what are the factors of printing qualityfonmoo
The complexity of the packaging printing process is well known, and the manufacturing of a good box is often accomplished in a dozen steps, involving companies, operators, etc. Different environments and different moments also have different ways of critiquing or requirements for printed products. Therefore, in this process, some specifications and corresponding observation conditions need to be developed.
Therefore, we only need to limit the environment as a peripheral element, in order to give a one-sided review of the print, so as to be fair and objective, in order to reduce the argument formed by the environment, so the standard lighting environment and standard light source is necessary. So what are the elements that affect the quality of packaging box printing?
Chromatic aberration of printed matter
Chromatic aberration can be divided into
(1) original color difference: the reproduction of the original color tone is the intention of the printing reproduction, so that the print and the original to the degree of indistinguishable from the real is the highest standard of one-sided review.
(2) the same batch of color difference: refers to the same batch of products in the same chromatic area of the same position, the color difference between different sheets.
(3) different from the same batch color difference: refers to the same product color error between different batches, if each batch of printing color are slightly different, when they are put together, customers will feel that these products have old and new, and even doubt whether its internal quality will be as unstable as the appearance, will cause distrust of the product, and naturally cause the manufacturer of the printer quality dissatisfaction.
As customers and printers hope that the value of this color error is preferably zero, but due to the actual production of various conditions, the complete elimination of color error is impossible, only by strengthening the quality control of the various links, so that the color quality of the product is different manipulation within the rules of the color difference specification. Color tolerance refers to the color difference between the printed product and the original or proof sheet that the customer can afford.
One-sided review of the color quality of printed materials is the choice of visual inspection method, the observer visually see the printed materials and with the original manuscript or pay the draft sample comparison, to make their own judgment, the primary consideration is to what extent the color quality of printed materials to be customer tolerance.
Whether in the printing process, or after printing to check the quality, printing operators or quality checkers should always rely on their own feelings and experience to reproduce the faithfulness and authenticity of the specification, the color quality of printed products to make comments.
Reproduction fidelity refers to the extent to which the printed product reproduces the color tones of the original. The printed product is a reproduction, and the original is our work throughout the color reproduction process from prepress processing to printing
Definition of original
In the old days, most originals came from slides, photos and hand-drawn color drafts, and were considered useful for color reproduction if they were close to the originals in the color separation process. In the printing industry, the customer’s approved proofs were used as a criterion, and as long as they could follow 90% of the original, they were generally considered to have passed.
But nowadays, there are more definitions of originals in the computer age. For example, if a customer sees a satisfactory color on the computer screen or in a printout, they think it is an original. Regardless of the type of original, the colors that are recorded or flashed may not necessarily be represented under normal printing conditions, as each color reproduction system has its own color gamut limitations. In the production process, the image siphoner uses the object as the original, the color separator uses the siphoned image as the original, and the printer uses the print as a color follow-up guide.
The objective review of print color quality is calculated by means of a one-sided review of the results, and then converted to the corresponding physical quantities, as an objective review of the specifications used. This can eliminate the influence of human factors in the review, by standardizing a unified standard fair review of the color quality of a variety of printed materials, and ultimately make it more consistent with the majority of one-sided review specifications. Objective evaluation method is the primary use of specific measuring instruments and tools, and the print with the picture printed together with some of the standard elements of measurement. As long as the measurement, to some extent, to make automatic control of printing quality is possible.
Color quality and production control
In order to produce high-quality color printing, it is necessary to strengthen the quality control of the production process, and quality control relies primarily on the objective evaluation of the product specification, that is, the development of a set of close material specifications, with the help of a variety of instruments to objectively determine and review the quality of the color of printed materials and other aspects of quality.
The intention of the color control processing of the packaging box printing plant is to improve the subtle distance between the original, the sample and the product. In the printing process, if the printed material can be randomly checked at any time, it is possible to find the problem through the deviated material, find the cause in time, so that the problem can be corrected, and then ensure the reproduction quality of the printed material. In addition to choosing density as a parameter to reflect the color quality of the print, it is necessary to promote the CIELab chromaticity value of color as a parameter to detect the quality of the print.
Every step of the process should be materialized, and every step should have a testing tool to detect, otherwise there will be many errors. Now, following the continuous advancement of process technology, color control means in printing has been further developed, and the new color handling system makes printing color control convenient and more useful.