Principles and Standards of Print Quality Control








Foreword No matter how the world changes, our ideal for pursuing perfection is still the same, and the operation of the printing industry is also the first to focus on administrative efficiency, manufacturing productivity and product quality. The first requirement for product quality is established in line with economic conditions. If it is a very tedious situation, it will rather be adopted. When the product is not good, there are two ways to deal with it:
(1) The Fisheye Mixing Method - Although it can escape for a while, it may affect the goodwill of the company.
(2) Implementation of the Quality Assurance Act - Positive and positive.
The term "quality control" was mainly supervised in the 1900s. It focused on quality inspections in the 1920s and was gradually included in the statistical concept from the 1930s to the 1950s. Therefore, with the statistical quality and reliability, it produced quality in the 1970s and 1980s. Management plan, quality assurance, quality control, fault-free calculation and other terms. Since 1980, European and American countries have become more popular in the implementation of quality control, and at the same time the so-called “all-member quality control” has entered the standardization-oriented stage.
First, the significance and principles of printing quality control The quality of the word 'goods' is composed of three, that is to say, there is a good reputation, and modern printing is mostly done by the scientific and technical machinery, the disadvantages are also reduced. Today's so-called quality is established by the customer's requirements, which is to meet the customer's requirements for quality. The printing factory should first reduce the bad rate in order to reduce customer complaints. The modern era is an era of superiority and inferior defeat. In the positive aspect, product quality should be maintained and the reputation of the company should be enhanced.
Quality management lies in 'communication'. Close consultation and contact between various departments are also the same between customers and companies. Therefore, it is impossible to make quality control behind closed doors. Therefore, quality control is a complete entity. The 'management department' has business or decision-making success or failure. From the grassroots level to the decision-making department, it can have the same idea. Only in this way can the same results come out. If there is a missing department, it often causes a great regret. Only when quality concepts and environment are organized, can we set goals and good plans and methods. Only then can a good assessment emerge.
Second, the variation of printing quality There are many reasons that affect the printing quality. Basically 'preventing' the occurrence of bad products is the most basic work to improve the printing quality. There is something wrong in the West: Prevention is better than cure. In terms of printing quality, bad products increase factory costs, waste time, and customer dissatisfaction. Therefore, it is necessary to find out the reasons, thoroughly solve problems, print quality (regulations, color tones), postpress quality (cropping, folding), Machine maintenance and material management issues, missing parts such as: leakage, breakage, pollution, scars, off page, overprint and other issues.
As regards human nature, it may be more negligence. For example, the quality of work spirit and attitudes require effective excitement and leadership. The efficiency, equipment, treatment and transportation environment are also part of the consideration. Problems with printing presses may be caused by problems with ink and water rollers or problems with electricity or materials and inks. In short, we must not mix and guess, and we should find out where the problems really lie. Otherwise, the consequences must still be borne.
As for the technical and production development issues such as: paper, ink, are involved in the chemical, printing plate, film, color separation, so the entire operation process and delivery, etc., will affect the cost, and the real impact of print quality factors can be The class is:
(1) Manuscript reproduction A color correction, network cable, gray balance, screen angle, various types, light sources, color filters, etc.
(b) Printing plate: the condition of the printed lines, the degree of reflection, etc.
(3) Paper: thickness, transparency, weight, gloss, surface properties, etc.
(d) the pH of the bath fluid, the conductivity value.
(5) Ink transparency, ink balance, color sequence, glossiness, elasticity, durability (light), heat, temperature control, photochemical reaction, etc.
Basically, there are many reasons involved. The supplementary explanations (special instructions) are as follows:
(A) Reasons for bad printing:
Temperature, humidity, equipment, light source, cleaning, drilling system, exposure time, material
·Operator attitude, flushing time, employee treatment (b) Color prints should meet customer requirements, consider factors such as:
·Material characteristics ·Customer requirements ·Original ·Dimensions ·Color accuracy · Edition adjustment ·Ink screen angle ·Document preservation ·Sacrificer establishment ·Equipment update and other factors (3)Proofing problems:
·It is impossible for the customer to understand that the copying of the original is 100% the same. To understand the color tone required by the customer. To use the difference in the printed material, to show different effects. · To communicate closely with the customer, so that the concept is very clear and not ideal design. Standards (4) Printing problems ·Drying and packing ·Printing systems - Water rollers, ink rollers, printing plates, blankets, pressure rollers, paper feeds, etc., guides, side guides.
The above-listed factors are the main part of the printing and quality control considerations. They are provided for reference. The conditions that must be met for fine prints are:
The edition copy is correct, the gray balance and hue are correct, and the image is vivid.
The control of printing quality variation factors, in addition to the proper processing of previous operations, the use of a 'guide' with a basis for printing, because there are scientific methods to control, improve the operation (data), can effectively eliminate the negative factors affecting quality.
Third, the set of printing quality standards Transportation traffic standards, weight and weight standards, of course, printed printing standards, basically anything should have a standard operation, inspection procedures (Fop. FIP). If there is a key misconduct, the printing plant should have the ability to dispose of it. Instead of waiting for suppliers: the increase in printing costs. The establishment of standards helps to reduce the rate of bad people, waste of manpower and material resources. For example, the material part:
(A) Plate material: such as size, thickness, tensile force, appearance, stretch tension, chemical composition and other standards.
(b) Part of the paper: standards such as domestic, foreign production, basis weight, whiteness, acidity, strength, humidity resistance, transparency, etc.
(C) ink problems: such as adaptability, lightfastness, hue, drying time and other standards.
However, the printing industry is a diversified industrial complex, including so many projects. There are chemical, electrical, and material sciences. There are portfolios of management, accounting, quality control, materials, etc. How to set the standards effectively depends on each Each department independently establishes standard policies and can work closely with each department to implement one-off quality control. Therefore, detailed work flow standards and inspection standards should be used to clarify the current laws and regulations for users' reference.
Fourth, the printing quality assurance practice (a) of a clear working process standards and testing standards (b) close communication with customers, really know the needs of (c) the company is consistent with the concept of all employees, consistent practice (four) statistical data and science Auxiliary Tools (V) Applying Professional Knowledge, All Members Contribution V. Conclusion Quality Control Successful Elements:
(1) Sound quality control operation system (2) Attitude of good overall cooperation (3) Appropriate participation of high-level supervisors (4) Professional training of top-down printed products (5) Printed products can be consistent with samples ( (6) The establishment of product standardization in line with the actual operation of the factory is the responsibility for the highest priority of quality control. Everyone is responsible, quality first, and safety first.

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