GB/T 12823.4-2008 English PDFUS$194.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 12823.4-2008: Photography -- Density measurement -- Part 4: Geometric conditions for reflection density Status: Valid
Basic dataStandard ID: GB/T 12823.4-2008 (GB/T12823.4-2008)Description (Translated English): Photography -- Density measurement -- Part 4: Geometric conditions for reflection density Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: G80 Classification of International Standard: 37.040.20 Word Count Estimation: 10,152 Date of Issue: 2008-09-24 Date of Implementation: 2009-05-01 Older Standard (superseded by this standard): GB/T 12822-1991 Quoted Standard: GB/T 12823.1-2008; GB/T 11501-2008 Adopted Standard: ISO 5-4-1995, IDT Regulation (derived from): Announcement of Newly Approved National Standards No. 16 of 2008 (No. 129 overall) 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 measurement of paper and printing plate materials geometric conditions for reflection density. This section provides various azimuth lighting conditions. This measurement is for the retro-reflective stripe is not sensitive surface. This section does not cover the use of polarized measuring conditions. This section applies to processed paper measuring the reflective properties of materials can also be applied to other materials in the same characteristic measurement. This section consists of the following three main functions: a) use traceable to fundamental physical phenomena and has a data standard substance that helps densitometer or spectrophotometer for density measurement calibration and verification, b) the need to explain measurement of interaction between organizations and contract consistency, providing a clear measurement basis, c) in order to solve between systems GB/T 12823.4-2008: Photography -- Density measurement -- Part 4: Geometric conditions for reflection density---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. Photography Density measurement Part 4. Geometric conditions for reflection density ICS 37.040.20 G80 National Standards of People's Republic of China GB/T 12823.4-2008/ISO 5-4.1995 Replacing GB/T 12822-1991 Photographic density measurements Part 4. Geometric conditions for reflection density (ISO 5-4.1995, IDT) Posted 2008-09-24 2009-05-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released ForewordGB/T 12823 "photographic density measurements" is divided into four parts. --- Part 1. Terms, symbols and notations; --- Part 2. Geometric conditions for transmission density; --- Part 3. Spectral conditions; --- Part 4. Geometric conditions for reflection density. This section GB/T Part of 412,823. This part identical with ISO 5-4.1995 "photographic density measurements --- --- Part 4. Geometric conditions for reflection density" (in English). This section is equivalent translation ISO 5-4.1995. For ease of use, this section made the following editorial changes. a) "ISO This part" be replaced by "GB/T 12823 in this section"; b) use a decimal point instead of a decimal comma ",". ","; c) Delete ISO 5-4.1995 foreword, the ISO 5-4.1995 introduction of the direct translation as part of the introduction; d) Normative references introductory phrase file to GB/T 1.1-2000 specified key words. The partial revision and replaces GB/T 12822-1991 "photographic reflection density measurement geometry." This section compared with the GB/T 12822-1991, the main changes are as follows. --- The standard name according to international standard name translated from the original "photographic reflection density measurement geometry" to "photographic density Measurement Part 4. Geometric conditions for reflection density "; --- Increasing the foreword and introduction; --- In order to more clearly understand the standard content of the "scope" of the content has been clearly defined; --- Added "Normative References" chapter in the reference standard, international standards have been translated into our national standards, the reference country Family standard; --- "Terms and Definitions" was expanded to apply for consistency and meaning clearer, increase some of the terms; --- Standard clarifies the optical properties of the substrate material for reflection density measurement of the impact causes the provisions of the visual reflection density of the substrate material. --- Appendix A recommended method of application of the optical parameters of the substrate material and common sample; --- Appendix B to emphasize the difference between the reflectance and reflection factor from the definition. Appendix A of this section and Appendix B is an informative annex. This part is proposed by the China Petroleum and Chemical Industry Association. This part of the photosensitive material by the National Standardization Technical Committee (SAC/TC102) centralized. This section drafted by. China Institute of Metrology, Guangdong Institute of Metrology. The main drafters of this section. Chen Rui, Zhu Junqing, Li Qing again. This Part replaces the previous editions are. --- GB/T 12822-1991. GB/T 12823.4-2008/ISO 5-4.1995IntroductionThis section GB/T 12823 defines the geometry reflection density measurement, they observe actual reflection photography and printing products Similar situation. In particular, it requires the lighting angle and the angle between the normals printed between 40 ° ~ 50 °, observation angle in the normal direction. This These conditions can reduce the surface gloss and maximize the density range of the image. Often call it the ring 45 ° .0 ° (or 0 ° .45 °) geometry condition. This section defines the geometry is to simulate lighting conditions observed at 45 ° sample or samples taken. Vertical illumination and collection geometry 45 ° Conditions advantage of certain aspects of engineering in the design of the measuring instrument. Exchange geometry currently no influence on the measurement results. Therefore, in the present The standard covers both geometric arrangements. Unless otherwise stated in this section, the sample should usually contact with the substrate material. The substrate material should be no spectral selectivity, diffuse (do not feel To specular) reflection and a density of 1.50 ± 0.20. Only some special proof test sample, the use of different substrate materials resulting The measurement result is the same, the reflection density of the substrate material are permissible deviation. This burden of proof is certainly measured densities. Measurement for in-line process control needs to have a consensus. the development of generally acceptable and the process for the current production tasks needed. Although the closed loop control system for on-line is not important, but these criteria are often useful. Due to the ever-changing application conditions, standards do not It may cover all practical conditions. GB/T 12823.4-2008/ISO 5-4.1995 Photographic density measurements Part 4. Geometric conditions for reflection density1 ScopeGB/T 12823 provisions of this part of the paper and the printing plate material measuring reflection density geometry. This section provides the lighting conditions at each azimuth. This measurement is not sensitive to the orientation of the surface reflective stripes. This section does not cover Using polarization measurement conditions. Reflection characteristic measurement This section applies only to the processing of paper material can also be applied to the same characteristic measurement of other materials. This part by the following three main functions. a) the use of traceable to the basic physical phenomena and a standard material data to help gauge the density or density measurements of the spectrum of light used Meter calibration and verification; b) contracts for the mutual exchange and consistency should be noted that measurement organizations, to provide a clear measurement basis; c) it seems to solve different measurement data between system provides arbitration function.2 Normative referencesThe following documents contain provisions which, through GB/T 12823 reference in this text, constitute provisions of this part. For dated reference documents Member, subsequent amendments or revisions do not apply to this section, however, according to whether the parties are encouraged to study this part of the agreement You can use the latest versions of these documents. For undated reference documents, the latest versions apply to this section. GB/T 12823.1-2008 photographic density measurements - Part 1. Terms, symbols and notations (ISO 5-1. 1984, IDT). GB/T 11501-2008 photographic density measurements - Part 3. Spectral conditions (ISO 5-3.1995, IDT).3 DefinitionsThe following terms and definitions apply to this section. 3.1 Flux reflected reflection sample throughput (ΦQ) and place of the sample is completely diffuse material (ΦQA) ratio, see equation (1). R = ΦQΦQA (1) 3.2 Reflection factor density DR The logarithm to the base 10 of the reciprocal of the reflection factor (see Appendix B) See formula (2). DR = lg R = -lgR (2)4 ISO standard reflection densitometer4.1 incoming and outgoing geometry Reflection measurements should be vertically oriented annular illumination and receiver or vertical directional illumination and annular receiver. These two modes are Known as the "Ring incident mode" and "Ring exit mode." Ring incident mode shown in Figure 1. If the arrow indicating the direction of the flux is reversed, "the GB/T 12823.4-2008/ISO 5-4.1995 ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 12823.4-2008_English be delivered?Answer: Upon your order, we will start to translate GB/T 12823.4-2008_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 12823.4-2008_English with my colleagues?Answer: Yes. 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