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GB/T 41467-2022 English PDF

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US$174.00 · In stock
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GB/T 41467-2022: Graphic technology - Measurement and calculation of spot colour tone value
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 41467-2022	174	Add to Cart	3 days	Graphic technology - Measurement and calculation of spot colour tone value	Valid

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Basic data

Standard ID: GB/T 41467-2022 (GB/T41467-2022)
Description (Translated English): Graphic technology - Measurement and calculation of spot colour tone value
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A17
Word Count Estimation: 9,916
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 41467-2022: Graphic technology - Measurement and calculation of spot colour tone value

---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.
Graphic technology -- Measurement and calculation of spot colour tone value ICS 37.100.01 CCSA17 National Standards of People's Republic of China Measurement and Calculation of Spot Tone Values in Printing Technology (ISO 20654.2017, IDT) Published on 2022-04-15 2022-11-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration directory Preface III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Requirement 1 4.1 Spot tone value calculation 1 4.2 Step 2 of obtaining SCTV from spectral reflectance measurements 4.3 Step 3 of obtaining SCTV from CIELAB measurements Reference 4

foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents" drafted. This document is equivalent to ISO 20654.2017 "Measurement and calculation of color tone values for printing technology". Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed and managed by the National Printing Standardization Technical Committee (SAC/TC170). This document was drafted by. Shenzhen Vocational and Technical College, Shenzhen Yutong Packaging Technology Co., Ltd., Anhui Xinhua Printing Co., Ltd. Company, Dongguan Vocational and Technical College, Shenzhen Kecai Printing Co., Ltd., Shenzhen Printing Industry Association, Zhejiang Chinese Digital Technology Co., Ltd. Company, Shenzhen Jinshengcai Packaging Materials Co., Ltd., Hongbo Co., Ltd., Beijing Shengtong Printing Co., Ltd., Beijing Shangtang Printing Pack Equipment Co., Ltd., Beijing Xinhua Printing Co., Ltd., Liaocheng City Product Quality Supervision and Inspection Institute. The main drafters of this document. Zhu Yongshuang, Chen Xiulan, Chen Chen, Shen Chunming, Wang Xuhong, Li Zhenxin, Zhang Yongdong, Jiang Jiali, Xie Wenqing, Li Honglei, Yang Yong, He Liming, Lan Benli, Fan Haifeng, Wang Lijie, Zhang Xuliang, Zhao Gang, Wu Li, Xu Xiangyang, He Wenqiong, Liu Zhihong, Chen Qisha, Liu Xia, Guo Rui, Zhong Wei, Liu Haoxue, Yang Zhiyuan, Yin Lihua, Lin Zehui, Zhao Shuwen, Hu Weiyou.

Introduction

This document specifies a new spot color tone value (SCTV) metric for determining the tone value of spot color inks. The specialties in this document Colors are defined as non-process colors (process colors are CMYK four-color inks). The method is based on the non-printed part of the substrate and the coverage 100% solid ink portion produces approximately uniform tonal visual spacing between portions. This metric is calculated from the measured spectral reflectance obtained, or calculated from the chromaticity values calculated from the same spectral data. For a long time, spot colors were managed only by measuring solid ink values, and there was no clear guidance or method for how to measure mid-tone tones. Law. This is reasonable for prints that contain only spot color solid inks; however, for spot colors with gradient gradations, When brushing or printing with other inks, a disciplined scheme is needed to manage spot color gradations. The current solution is to print Linear scale, and use its value as a reference tone value for calibration. In practice, such operations lead to different results from each printing supplier. Are not the same. In the past, spot color gradation has been measured using the standard process tones measurement method, which is based on cyan, magenta, and yellow Spectral combination obtained from ink optimization, measured under ISO density measurement state. This method is not suitable for mid-tones of spot colors, because in the In most cases, the generated step scale is far from the uniformity of visual perception. Therefore, it is necessary to find a new measurement method, Quantifies spot color mid-tones with more uniformity for visual perception. This document is the result of many people researching and testing a range of alternatives. Especially WiliamB.Birkett, Measurement and Calculation of Spot Tone Values in Printing Technology

1 Scope

This document presents a metric for evaluating midtones in spot inks. This is used to calculate the spot color tone value (SCTV) The method produces tone values that are approximately uniformly visually spaced between the substrate and the solid. It can be obtained from solid inks, substrates and one or more Calculated from a measure of spectral reflectance or chromaticity of the mid-level toner patch.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document. ISO 13655 Printing technology Spectral measurement and colorimetric calculation of printed images (Graphictechnology-Spectralmeasure- Note. GB/T 19437-2004 Spectral measurement and chromaticity calculation of printed images in printing technology (ISO 13655.1996, IDT)

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 colour exchange format colourexchangeformat A standard that defines a data exchange format for spot color ink characteristics (CxF/X-4). 3.2 spotcolour ink Inks that do not belong to the process ink group. Note. Spot color inks are often used to print trademark colors. [Source. ISO 12647-7, 3.9] 3.3 spotcolortonevalue; SCTV A value that describes the halftone appearance of non-process inks. NOTE. All possible series of tonal values between the non-printed portion of the substrate and the fully covered solid portion will yield an approximately uniform vision of the printed tone color interval. The range of this metric is 0% to 100%, where 0 represents the substrate and 100 represents the spot color solid.

4 Requirements

4.1 Spot tone value calculation This clause defines the Spot Tone Value (SCTV) formula determined by the standard chromaticity variable. The following provides an overview of the spectral reflectance data and Steps for calculating SCTV from CIELAB values. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 41467-2022_English be delivered?

Answer: Upon your order, we will start to translate GB/T 41467-2022_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 41467-2022_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 41467-2022_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. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.