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Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 28033-2011: Methods of comprehensive evaluation for prints quality of monochrome laser printer Status: Valid
Basic dataStandard ID: GB/T 28033-2011 (GB/T28033-2011)Description (Translated English): Methods of comprehensive evaluation for prints quality of monochrome laser printer Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: L63 Classification of International Standard: 37.100.10 Word Count Estimation: 15,173 Date of Issue: 2011-10-31 Date of Implementation: 2012-02-01 Quoted Standard: GB/T 22372-2008 Regulation (derived from): Announcement of Newly Approved National Standards No. 15 of 2011 Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China Summary: This standard specifies the monochrome laser printer printing quality comprehensive evaluation method. This standard applies to A3 and A4 format monochrome laser printer printing quality evaluation. And consumable materials (such as light conductors, cartridge, developer, etc.) related to printing quality assessment can select which part of the project, other printers, such as LED printers can use and reference. GB/T 28033-2011: Methods of comprehensive evaluation for prints quality of monochrome laser printer---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. Methods of comprehensive evaluation for prints quality of monochrome laser printer ICS 37.100.10 L63 National Standards of People's Republic of China Monochrome laser printer printing quality evaluation method Published on.2011-10-31 2012-02-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Administration issued ContentForeword I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Test environment conditions 1 5 Test Instruments and Materials 2 6 Evaluation item 2 7 Test Method 3 8 Test Results Report 8 Appendix A (Normative Appendix) Basic Requirements for Friction Testing Machines 9 Appendix B (Normative) Print Accuracy Test Version Description 10ForewordThis standard was proposed by the China Machinery Industry Federation. This standard is under the jurisdiction of the National Copy Machinery Standardization Technical Committee (SAC/TC147). Appendix A and Appendix B of this standard are normative appendices. This standard was drafted. Mechanical Industry Office Automation Equipment Inspection Institute, National Office Equipment and Consumables Quality Supervision and Inspection Center, Tianwei Pegasus Printing Supplies Co., Ltd., Shanghai Fuji Xerox Co., Ltd., Zhuhai Nasida Enterprise Management Co., Ltd., Canon (China) Co., Ltd. Epson (China) Co., Ltd., Lexmark Printer (Shenzhen) Co., Ltd. Beijing Branch, HP (China) Co., Ltd., Ricoh Image Technology (Shanghai) Co., Ltd. Shenzhen Branch, Konica Minolta Business Technology (Wuxi) Co., Ltd., National Printing and Office Automation Consumables Quality Supervision and Inspection Center, Beijing Laisheng High-tech Co., Ltd., Wuhan Baotelong Information Technology Co., Ltd., Changzhou Tuna Toner Technology Limited company, Lenovo (Beijing) Co., Ltd. The main drafters of this standard. Liu Huiling, Ma Yan, Zhang Xiping, Qiu Xiangru, Xu Aiping, Lu Junhe, Gao Zhen, Guo Xiwen, Yan Lizhen, Liu Shengying, Chen Ting, Li Xiaofeng, Dong Yingjie, Zhu Jishun, Chen Yifan, Fan Zhiguo. Monochrome laser printer printing quality evaluation method1 ScopeThis standard specifies a comprehensive evaluation method for the quality of black and white monochrome laser printers. This standard applies to the evaluation of the quality of A3 and A4 format black and white monochrome laser printers. With consumable materials (such as photoconductors, toner) Some of the items can be selected for the quality evaluation of the printed products related to the box, developer, etc. Other printers, such as LED printers, can be used for reference.2 Normative referencesThe terms in the following documents become the terms of this standard by reference to this standard. All dated references, followed by all Modifications (not including errata content) or revisions do not apply to this standard, however, parties to agreements based on this standard are encouraged to study Is it possible to use the latest version of these files? For undated references, the latest edition applies to this standard. GB/T 22372-2008 monochrome black and white laser printer test version3 Terms and definitionsThe following terms and definitions established in GB/T 22372-2008 apply to this standard. 3.1 Black dot extraneousmarks Refers to clearly identifiable toner particles or aggregates in the background area. 3.2 White point voids Refers to clearly identifiable blanks or gaps in a solid map. 3.3 Deformation Refers to undesired changes in the shape of the image and text. 3.4 Alignment registration In the black and white monochrome laser printer test version, the electronic graphic file described in the "crosshair" mode is restored to the printed product. When the center point of the X, Y coordinate point changes. 3.5 Neighborhood effect fringeeffect Refers to the deposition of toner or toner in a non-image area adjacent to an image.4 Test environmental conditions4.1 Temperature 18 ° C ~ 28 ° C. 4.2 Humidity 40%~60% RH. 4.3 Test bench illumination 600lx~1000lx.5 Test instruments and materials5.1 reflection density meter Repeatability. ±0.01D, accuracy. ±0.02D. 5.2 Whiteness meter (measuring blue light whiteness) Measuring range. 0~199.9, repeatability. ±0.1. 5.3 friction testing machine See Appendix A for requirements. 5.4 Vernier calipers and steel rulers Vernier caliper. accuracy is not less than 0.02mm. Steel ruler. The division value is not more than 0.5mm. 5.5 scale magnifier 10~20 times, the division value is not more than 0.1mm. 5.6 reading microscope The division value is not more than 0.01 mm. 5.7 Test Paper Standard quantitative 70~80g/m2 ordinary white A3, A4 copy paper. 5.8 Standard test version for testing Comprehensive version, all black version, missing version, all white version, gray version and ghost generated by the supporting software of GB/T 22372-2008 standard Photocopy. 5.9 Print Accuracy Beta See Appendix B for instructions.6 Evaluation projectPrint quality evaluation includes the following. a) Print accuracy. 1) Skewness; 2) Straightness; 3) Diagonal error; 4) Parallelism; 5) alignment; 6) Magnification; 7) Scanning linearity; 8) Effective print area. b) Density characteristics. 1) image density; 2) Density non-uniformity. c) Print defects. 1) bottom ash; 2) black spots; 3) white spots; 4) ghosting; 5) Missing printing; 6) Defects in the effective area. d) Detail features. 1) resolution; 2) text printing; 3) Image printing. e) Gray level (hierarchy). f) Fixation fastness.7 Test methods7.1 Sample Pretreatment The print sample is tested after being placed in the test environment for at least 2 hours. 7.2 Print quality evaluation method 7.2.1 Related instructions 7.2.1.1 Instructions for use of the test version, see Table 1. Table 1 Test item table Version of the category test project Comprehensive version Skewness, straightness, diagonal error, parallelism, alignment, magnification, scan linearity Image density, density non-uniformity, fixing fastness, resolution, defects in the effective area, gray scale (hierarchy), text printing, graphics Like printing Full black version effective printing area, white point All white version of black spots, bottom gray Table 1 (continued) Version of the category test project Missing plate missing (area, number) Gray scale density non-uniformity Ghost version ghost 7.2.1.2 When measuring with a reflection densitometer, 5 sheets of copy paper of the same batch as the sample shall be placed under the sample, and the absolute density shall be measured. Degree value. 7.2.2 Printing accuracy 7.2.2.1 Skewness Take the comprehensive test sample as a sample and place it on the sample with the print accuracy test version (see Figure 1). AB on print accuracy test version The line and the top border line G of the sample coincide, and point A coincides with the upper left vertex of the sample border line. Measure two points C and D to the top edge of the sample The distance between the distances is the skewness. 7.2.2.2 Straightness Take the comprehensive version of the test sample as a sample, place the print accuracy test on the sample, and point A coincides with the upper left vertex of the sample border line. When measuring horizontal straightness, it is required that the CD on the printing accuracy test plate is on the upper border line G of the sample; the requirement for measuring the vertical straightness is required. The EF on the print accuracy test is on the left border line F of the sample. Take the line on the print accuracy test board as the baseline and use the reading The microscope measures the maximum distance the sample line deviates from the baseline. Horizontal line straightness measures the maximum distance of the line between two points on the CD from the baseline The vertical straightness measures the maximum distance of the line between the two points of the EF from the reference line, and calculates the straightness according to the formula (1). Straightness = ∣L1/L0 ∣×100% (1) In the formula. L1---the maximum distance of the line on the sample from the reference line, mm; L0---The length of the measured line, mm. 7.2.2.3 Diagonal error Take the comprehensive test sample as a sample and measure the length of the two diagonals of the rectangle formed by the sample frame. The difference between the lengths is diagonal. error. Figure 1 Print accuracy test version of the pattern and laser printer comprehensive test version of the structure 7.2.2.4 Parallelism Take a comprehensive version of the test sample as a sample and place it on the sample with a print accuracy test. AB line and sample on print accuracy test The top border line G coincides, and point A coincides with the upper left vertex of the sample border line. Measure the two points C and D along the CI and DJ and the bottom of the sample. The distance between the lines and the distance between them is the longitudinal parallelism. The AK line on the print quality test version coincides with the left border line F of the sample, and point A coincides with the upper left vertex of the sample border line. measuring The distance between E and F is along the distance between EG and FH and the right border line of the sample, and the difference between the distances is the horizontal parallelism. 7.2.2.5 Alignment Take a comprehensive version of the test sample as a sample and place it on the sample with a print accuracy test. Pair of O points and samples on the print accuracy test The intersection of the parity test coordinates P coincides, OM and ON are aligned with the corresponding sides, and the distance from the O point to the left side of the sample paper and the top edge of the paper is measured. according to The standard values given in Table 2 calculate the difference between the measured value and the standard value. Table 2 Alignment Value Table Left margin of the web/mm top margin/mm A3 40 140 A4 45 105 7.2.2.6 Magnification Take the comprehensive test sample as a sample, and take two points at the interval of 100mm on the horizontal and vertical scales respectively, and measure the actual length. Degree value L. Calculate the magnification according to equation (2). Magnification = ∣L/100∣×100% (2) In the formula. L---The length between two points on the sample, mm. 7.2.2.7 Scanning linearity Take a comprehensive version of the test sample as a sample, take 25mm as a unit, and sample the 5 positions evenly distributed on the horizontal scale. The standard caliper measures its actual length value L, and the maximum difference of the actual length value is calculated as scanning linearity. 7.2.2.8 Effective printing area On the whole black version of the sample, the width of the upper and lower ends of the black area of the image is recorded as La1 and La2, and the heights of the left and right sides are recorded as Lb1 and Lb2, respectively. The values of La1, La2, Lb1, and Lb2 are calculated according to formula (3). Effective print area = (La1 La2)/2 × (Lb1 Lb2)/2 (3) 7.2.3 Density characteristics 7.2.3.1 Image density The density values of the three solid circles of the upper left, middle left, and lower right labeled D on the comprehensive test sample are measured by a reflection densitometer. The amount results are taken as the average of the density. 7.2.3.2 Density non-uniformity The density value of the center position of the six solid circles on the comprehensive test sample is measured by a reflection densitometer, and the maximum value of the measured values is selected. And the minimum value, the density unevenness is calculated according to the formula (4). Use a reflection densitometer to measure the density values in the five circles in the same density region on the gray scale test sample, and select the measured values. The maximum and minimum values are calculated according to equation (4). Density non-uniformity = [(Dmax - Dmin)/Dmax] × 100% (4) In the formula. Dmax---maximum density; Dmin - the minimum density. 7.2.4 Defects 7.2.4.1 bottom ash The center circle area should be covered when making a full white test sample; You can choose one of the following two test methods. a) Use a reflection densitometer to measure the absolute density values in the four circles around the uncovered area, taking the largest value, recorded as D1, measured The absolute density value in the center circle of the covered area is recorded as D2, and the difference of D1-D2 is calculated. b) Place 5 copies of the same batch of copy paper under the test sample, and measure the 4 circles around the uncovered area with a whiteness meter. The whiteness value, taking the smallest value, recorded as B1, measuring the whiteness value in the center circle of the covered area, recorded as B2, calculated The difference between B2-B1. 7.2.4.2 Black spots The number of black dots having a diameter greater than 0.1 mm on the full white test sample was measured with a graduated magnifying glass. 7.2.4.3 White point The number of white dots having a diameter greater than 0.1 mm on the full black test sample was measured with a graduated magnifying glass. 7.2.4.4 Ghost Observe the shadow of the Q word in each of the different gray areas in the second column of the ghost version test sample. 7.2.4.5 Missing Observe the missing print on the missing print test sample, and measure the area and number of the miss print with a graduated magnifying glass. 7.2.4.6 Defects in the effective area Observe the comprehensive test sample and check for the following obvious defects. a) the effect of the neighbourhood; b) text or image distortion; c) the line is broken; d) black rim; e) The back is dirty. 7.2.5 Detail features 7.2.5.1 Resolution Use a graduated magnifying glass to observe the resolution map of the five areas labeled E in the comprehensive test sample, which can clearly distinguish the highest The line number is the judgment value. 7.2.5.2 Text printing Observe and evaluate the degree of sharpness of the text handwriting marked L on the comprehensive test sample. 7.2.5.3 Image printing Observe and evaluate the degree of detail that can be resolved in the dark portion of the top of the image of the image area labeled M on the comprehensive test sample. 7.2.6 Gray level (level) Observe the 16-level grayscale map labeled C on the comprehensive test sample. Use instrumental measurements when visually discriminating. Visually inspect the density difference series on the comprehensive test sample with different density gray levels that can be clearly distinguished continuously. When the visual discrimination is controversial, the density value of the center position of each level of the gray level of the sample is measured by a reflection densitometer, and is judged according to the formula (5). (5) is the density series that can be continuously resolved. Di 1-Di >0.04 (5) In the formula. i --- the order number of the gray level (i = 1 ~ 15); Di---The density value of the i-th gray level on the sample. 7.2.7 Fixing fastness Center the center of any solid circle in the middle part labeled D on the comprehensive test sample to pass the center point and sample. A line parallel to the top or side of the sheet is cut into a 30 mm wide strip as a sample, and the solid circle is measured by a reflective optical densitometer. The density value before D. Then place the sample on the friction tester, place the test point at the center of the friction table, then rub back and forth twice, then measure the reflection. After the density value D. The fixing fastness is calculated according to the formula (6). Fixing fastness = D after/D before × 100% (6)8 test results report8.1 Test Identification Information The test report should include the printer model, batch, inspection date, test environment, inspection operator, and so on. 8.2 Instrument System The test report should include the name, model, etc. of the instrument used. 8.3 Results The test results of each evaluation item shall be clearly indicated in the test report.Appendix A(normative appendix) Basic requirements for friction testing machine A.1 The friction tester shall meet the following requirements A.1.1 Power supply Voltage. 220V; Frequency. 50 Hz. A.1.2 Friction head load. 400g ± 20g. A.1.3 Diaphragm cylindrical surface diameter. 40mm. A.1.4 Radius of the cylindrical surface of the friction table. not less than.200mm. A.1.5 Friction stroke. 20mm~25mm. A.1.6 Friction frequency. 30 times/min. A.1.7 It has the functions of automatic counting and preset friction times. Note. It is recommended to use the MC-2 friction tester developed by the National Office Equipment and Consumables Quality Supervision and Inspection Center. A.2 Test A.2.1 Fix the specimen on the friction test bench and tighten the specimen to prevent loosening. A.2.2 Adjust the friction head load to 400g. A.2.3 Prepare the W7 metallographic sandpaper for friction and cut the sandpaper into a 10mm~15mm wide sandpaper strip. A.2.4 Clamp the sandpaper strip on the friction head, and the sandpaper is not allowed to wrinkle. A.2.5 For each test piece, rotate the friction head once to ensure that the surface of the sandpaper is not reused and replace the sandpaper strip at the right time.Appendix B(normative appendix) Print accuracy test description B.1 Print accuracy test version is used to assist in measuring the printing accuracy of laser printer prints. The test version of the media is transparencies (see Figure B.1). Figure B.1 Print accuracy test pattern The basic dimensions and limit deviations of the B.2 test version are as follows. A4. Frame width 210mm ± 0.2mm length 297mm ± 0.3mm AB 198mm±0.2mm AK 285mm±0.3mm CD 170mm ± 0.15mm EF 260mm ± 0.25mm OM 50mm±0.05mm ON 110mm±0.1mm A3. Frame width 297mm ± 0.3mm length 420mm ± 0.4mm AB 285mm±0.3mm AK 408mm±0.4mm CD 260mm ± 0.25mm EF 390mm ± 0.4mm OM 45mm±0.05mm ON 45mm±0.15mm ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 28033-2011_English be delivered?Answer: Upon your order, we will start to translate GB/T 28033-2011_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 28033-2011_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 28033-2011_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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