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First, fill in the blank (1 point for each space, a total of 20 points)
1. In the eleventh century AD, the invention of movable type printing was invented in China. In the 15th century, the Europeans invented the technique of casting lead characters.
2. Printing is divided into ___printing, __printing, __printing, and __printing according to the relative positions or forms of the surface and non-graphical portions of the printing plate surface.
3. To complete a copy of a print, generally go through three processes: __, __, and __.
4. The colors are divided into two major categories: ___ and ___.
5. The blue light and the green light are mixed, and the light of the ___ color appears, and the complementary light of the red light is the __ color light.
6. The red magenta version uses the ___ filter, the yellow version uses the __ filter, and color separation is applied to the ___ principle.
7. The electronic color separation machine experienced the development process of __electronic color separation, __electronic color separation, and __electronic color separation.
8. The positive PS version uses ___ negative printing.
Second, multiple-choice questions (4 points for each question, a total of 20 points. Each question can only choose one correct answer, multiple answers to the wrong answer score)
1. Any color can be represented by () three quantities.
A. Density, color shift, absorption rate B. Hue, brightness, saturation
C. Grayscale, color efficiency, reflectivity D. Primary colors, complex colors, and intermediate colors
2. With red light as the lighting condition, observe the cyan prints and see ().
A. Blue B. Magenta C. Black D. yellow
3.50% of square dots, large dot gain ().
A. 34 lines/cm B.53 lines/cm C. 60 lines/cm D. 70 lines/cm
4. In the paper format, the size of the International Type A paper is ().
A. 787×960mm B.787×1092mm C. 850×1168mm D. 880×1230mm
5. Lithographic ink drying methods are mainly based on ().
A. Oxidation polymerization B. Solvent evaporation C. Heat curing D. penetration
Three. Calculation (10 points)
Make an 8-outlet commercial sample of 4 pages. The net size after folding is 424×330mm. The known paper size is 612×440mm. The four printing machines start printing. The printing opening of the four-opening printing press is 10mm, and the three-side incision is 3mm. The existing manuscripts are all enlarged by cropping. The cover is 153mm, the sealer is 51mm, the sealer 3 is 61.2mm, and the back cover is 76.5mm. Find the respective magnification.
Four, short answer questions (10 points for each question, a total of 30 points)
1. Write down the following definitions of printing technology terms: printing, screening, color separation, density.
2. Write out the main quality standards for electronic color separations.
3. What are the main contents of maintenance of electronic color separation machine and computer room?
V. Narrative questions (20 points)
Describe the color separation principle of the electronic color separation machine.
Test sample answers
First, fill in the blank
1. Bi Shenggu Tengbao 2. Letterpress plate intaglio plate
3. Prepress processing, printing and postpress processing
4. Color non-color 5. Green
6. Green blue filter selectively absorbs and transmits color light
7. Continuously tune direct screen laser screening 8. Positive
Second, multiple choice
1. B 2. C 3. D 4. D 5. A
Three, calculation questions
A: The cover is 200%, the cover two is 600%, the cover three is 500%, and the back cover is 400%.
Fourth, short answer questions
1. A: Printing: The use of printing plates or other methods to transfer the graphic information on the original to the printing process on the substrate.
Screening: In the process of printing and copying, the continuous adjustment of originals (or color separations) through screens or electronic or laser technologies is decomposed into printable dots and nets.
Color separation sheet: The color original is decomposed into single-color (base color) lines, continuous tone or halftone positive images, and negative image negative films by color separation.
Density: The characteristic measure of the light absorbed by an object, ie, the ratio of the amount of incident light to the amount of reflected light, expressed as the decimal logarithm of the reciprocal of the transmittance or reflectance.
2. A: The specifications are correct, the range of adjustment is correct, the quality of the outlets is good, the color correction is accurate, the layers are rich, the neutral gray balance meets the requirements, the image clarity is high, and the layout is clean.
3. Answer: Every day, cleanliness and room temperature control of the machine and machine room environment should be done. Keep all parts and connections of the electronic color separation machine free of dust. The internal screw of the extension machine should be wiped once a week and be thinned. Lubricate the oil and clean the air pump once a month.
V. Narrative questions
A: The electronic color separation is to obtain the original color separation light signal by the spectral filter system of the scanning head, and convert the optical signal into an electrical signal, and then perform the color, gradation, sharpness correction and bottom color removal and other arithmetic processing on the color separation electrical signal. At the same time, the image is scaled, electronically screened, and finally recorded with a laser.
Primary electronic color separation worker operation skill appraisal sample
First, test questions
Select a reflective original for electronic color separation.
Second, the test requirements and scoring criteria
1. The operation time is from the acceptance of the manuscript to the calibration until the end of the development. It is completed in 30 minutes (40 points on time, 0.5 minutes for each minute).
2. The color separation quality was evaluated by the developed and fixed color separation sheets (the quality was 20 points, and the quality was not good enough).
3. The quality of the original manuscript was evaluated under the normal conditions of copying and printing.
4. Comply with safety procedures. (10 points)
Primary electronic color separation theory knowledge identification sample
Primary electronic color separation theory knowledge identification sample