GB/T 33153-2025Imaging materials - Reflection colour photographic prints - Test print construction and measurement (English PDF)

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 for standardization documents" Drafting.

This document replaces GB/T 33153-2016 "Image material reflective color photography test photo structure and measurement" and Compared with GB/T 33153-2016, in addition to structural adjustments and editorial changes, the main technical changes are as follows.

a) Deleted some terms and definitions (see 3.1 to 3.6 and 3.8 of the 2016 edition);

b) Added "Symbol" (see 3.2);

c) Added "Analysis requirements for color changes during image stability" (see Chapter 4);

d) Deleted the content related to the use of digital test documents (see 5.1 of the 2016 edition);

e) Deleted the content related to general requirements for digital test documents (see 5.2 of the 2016 edition);

f) Deleted the content of the image printing stability test for digital files - CMYK (see 5.3.3 of the 2016 edition);

g) Deleted the content of preparing test files for the stability of digital image forming materials (see 5.4 of the 2016 edition);

h) Deleted the content related to target printability (see 5.4, 5.5 of the 2016 edition);

i) Deleted the uniformity under laboratory conditions (see 5.5 of the 2016 edition);

j) Deleted the content related to measurement and control conditions, and added ozone sensitivity test requirements (see 7.2, 7.2 of the 2016 edition);

k) Added test color patch measurement, color change calculation, and reporting (see Chapters 8 to 10);

l) Added R, G, B, C, M, Y and neutral color block values and neutral color block encoding values in sRGB linear targets (see Appendix A

Table A.1, Table A.2);

m) Changed the R, G, B, C, M, and Y color block values in the CIELAB colorimetric target (see Table A.5 in Appendix A, 2016 edition).

Table A.3, Table A.4);

n) Added Dmax exception processing method and color block selection processing equation (see A.5.5, A.5.6).

This document is equivalent to ISO 18944:2018 "Preparation and measurement of test prints for reflective colour photography of imaging materials".

Introduction

This document is one in a series of standards covering the physical properties, stability, and durability of imaging materials.

This document governs factors related to print target preparation and final print target measurement that may cause the measurement the color and density values change.

The requirements in this document are used in conjunction with test methods where test data can be shared publicly, with the intention that test results can be used in conjunction with alternative test equipment.

Repeat during application.

Topics discussed in this document include.

---Digital file preparation;

--- Digital test file use;

---Print target uniformity;

---Printing system configuration and control;

---Test printing conditions;

---Measurement time and measurement conditions;

---Color patch, sRGB coded color patch value of test target and corresponding color patch selection;

---Density and colorimetric calculations of color changes.

Test target design and test print sample preparation are important factors in characterizing the image stability of printed materials, i.e., changes in color properties, such as Minimal density variations, as well as lightness, hue, and chroma of colored and neutral patches.

The test goal is to select a specific color sample from the color space that represents the performance of the image stability in the expected instance.

Other important factors in this characterization process are the definition of the color attributes to be evaluated, the construction of indices, and the statistical evaluation of the data analysis.

Selection, such as the average, median or maximum variation of a single color or all colors. Unless the observer has formed an inner visual judgment, the measured in this document, the color change properties of color patches and neutral patches are defined and calculated using the density method.

Small density changes are characterized by colorimetry. The purpose of evaluating color property changes is to Provides a terminal system that can be used for the image life specification that is being developed in the series of photo life specification standards. Formerly color attributes the definitions are contained in various test methods and are now incorporated into this document.

Image material reflective color photography Preparation and measurement of test photos

1 Scope

This document specifies requirements and recommendations for digital test file content, printer settings, and printing procedures for generating print targets.

Standard and specification for test methods for image stability of reflective color photographic prints.

In addition, this document specifies the measurement procedure for the test color patches and how the color attributes are calculated during a given image stability test.

Sexual changes.

The definition of statistical procedures for data reduction and the translation of these changes into psychophysical endpoint levels are beyond the scope of this document, but the results obtained using the methods defined in this document can provide for appropriate statistical evaluation and End point system.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to this document.

gy-Densitymeasurements-Part 3: Spectralconditions) Note. GB/T 11501-2008 Photographic density measurement Part 3: Spectral conditions (ISO 5-3:1995, IDT) ISO 5-4 Photography and graphic techniques — Density measurement — Part 4: Geometric conditions for reflection density Note. GB/T 12823.4-2008 Photographic density measurement Part 4: Geometric conditions for reflection density (ISO 5-4:1995, IDT) ISO 11664-4 Colorimetry-Part 4: CIE 1976 L*a*b* color space L*a*b* Colourspace) ISO 13655 Graphic technology - Spectral measurement and colorimetric calculation of printed images Note. GB/T 19437-2004 Printing technology - Spectral measurement and colorimetric calculation of printed images (ISO 13655:1996, IDT) ISO 18913 Imaging materials - Permanence - Vocabulary ISO 18941 Imaging materials - Test method for color reflective prints - Ozone gas fading stability IEC 61966-2-1 Color measurement and management for multimedia systems and devices Part 2-1.Color management default RGB color space Colourmanagement-DefaultRGB colorspace-sRGB)

3 Terms, definitions and symbols