The second competition will be divided into three competition types: lithographic printer, lithographic platemaker, and screen printer, each of which is divided into two groups; the employee group and the student group, a total of 6 groups. On April 16, 2010, the Ministry of Human Resources and Social Security organized the "2010 National Vocational Skills Competition Series Launch Ceremony" in Beijing, which kicked off the printing industry vocational skills competition. The competition stipulates four types of theoretical knowledge contest questions: single-choice questions (50 points), multiple-choice questions (20 points), judgment questions (20 points) and quiz questions (10 points). Judging from the results of the theoretical knowledge contest of the last printing staff group, whether it is a single-choice question, a multiple-choice question, or a judgment question, the main reasons for the errors in the answer questions are: 1. Lack of basic theoretical knowledge; 2. Wrong understanding of the test questions; 3. Unclear understanding of conceptual issues; 4. Lack of understanding of the development of new printing technologies. For example, many players misunderstand the following concepts: 1. Unclear definition and concept of "gray balance" and "neutral gray"; 2. The concept of "oil-in-water" O / W emulsion and "water-in-oil" W / O emulsion in the process of lithographic wetting is confusing; 3. It is wrong to judge whether flat printing is direct printing or indirect printing; 4. Lack of understanding of the basic knowledge of printing chromatics, such as "color plus color mixing" and "color subtractive color mixing". 5. I don't know how much the best pH value of the wetting fluid; 6. Wrong judgment on whether the air cushion blanket is compressible or incompressible; 7. Don't understand the working method of CTP computer direct plate-making equipment; 8. There are several types of CTP printing plates that are not understood; 9. What are the conditions for maintaining water / ink balance? Incomplete answers or misunderstandings; 10. Most flat-printed contestants have inaccurate or misunderstood the question of "what is the concept of handing over paper in static or relatively static state?" The above are just some typical examples to illustrate the problems of players in the theoretical knowledge competition. It is hoped that the contestants participating in this competition will take this as a warning and strengthen the learning and mastering of basic theoretical knowledge. Actively participate in theoretical knowledge training, and earnestly study the basic knowledge of the first volume of "Lithographic Printing Worker", the middle-level junior workers, intermediate-level soil, senior workers and the next volume technicians, high-tech technician courses. When answering questions, the contestants must carefully understand the meaning of the questions on the judgment questions and multiple choice questions, and make correct or wrong judgments and choices on plausible judgment questions. "Questions and answers" are mainly for theoretical assessment of the printing skills that players should master. For example, how to master the water / ink balance in the lithography process; what is the ideal pressure of offset printing, and what factors affect the ideal pressure of offset printing? For such questions and answers, players should grasp the core of the question and answer it concisely and concisely. Only by fully grasping the basic knowledge and skills and proficient in the printing process can questions be answered correctly. I wish the contestants to achieve excellent results in the competition of skills and theoretical knowledge.
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