ASTM D4303-06
Standard Test Methods for Lightfastness of Colorants Used in Artists'' Materials

Standard No.

ASTM D4303-06

Release Date

2006

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D4303-10

Latest

ASTM D4303-10(2022)

Scope

1.1 Four test methods to accelerate the effects of long term indoor illumination on artists'' materials are described below. One of the natural daylight methods and one of the xenon-arc methods are used to categorize the lightfastness of colorants.

1.1.1 Test Method AExposure in southern Florida to natural daylight filtered through window glass.

1.1.2 Test Method BExposure in Arizona to natural daylight filtered through window glass.

1.1.3 Test Method CExposure in a non-humidity controlled xenon-arc device simulating daylight filtered through window glass.

1.1.4 Test Method DExposure in a humidity controlled xenon-arc device simulating daylight filtered through window glass.

1.2 These test methods are used to approximate the color change that can be expected over time in colorants used in artists'' materials exposed indoors to daylight through window glass. Note 1The color changes that result from accelerated exposure may not duplicate the results of normal indoor exposure in a home, art gallery, or museum. The relative resistance to change, however, can be established so colored materials can be assigned to categories of relative lightfastness.

Note 2

Users who wish to test colored materials under fluorescent illumination should consult Practice D 4674.

1.3 Lightfastness categories are established to which colorants are assigned based on the color difference between specimens before and after exposure.

1.4 Color difference units are calculated by the CIE 1976 L*a*b* color difference equation.

1.5 These test methods apply to colored artists'' materials.

1.6 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

This standard does not purport to address the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

ASTM D4303-06 Referenced Document

• ASTM D2244 Standard Test Method for Calculation of Color Differences From Instrumentally Measured Color Coordinates
• ASTM D4302 Standard Specification for Artists' Oil, Resin-Oil, and Alkyd Paints
• ASTM D4674 Standard Test Method for Accelerated Testing for Color Stability of Plastics Exposed to Indoor Fluorescent Lighting and Window-Filtered Daylight
• ASTM D5067 Standard Specification for Artists' Watercolor Paints
• ASTM D5098 Standard Specification for Artists' Acrylic Emulsion Paints
• ASTM D5724 Standard Specification for Gouache Paints
• ASTM D6901 Standard Specification for Artists' Colored Pencils
• ASTM E1347 Standard Test Method for Color and Color-Difference Measurement by Tristimulus (Filter) Colorimetry
• ASTM E1348 Standard Test Method for Transmittance and Color by Spectrophotometry Using Hemispherical Geometry
• ASTM E1349 Standard Test Method for Reflectance Factor and Color by Spectrophotometry Using Bidirectional Geometry
• ASTM E284 Standard Terminology of Appearance
• ASTM G113 Standard Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials
• ASTM G141 Standard Guide for Addressing Variability in Exposure Testing on Nonmetallic Materials
• ASTM G151 Standard Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that Use Laboratory Light Sources
• ASTM G155 Standard Practice for Operating Xenon Arc Lamp Apparatus for Exposure of Materials*， 2024-04-19 Update
• ASTM G24 Standard Practice for Conducting Exposures to Daylight Filtered Through Glass

ASTM D4303-06 history

• 2022 ASTM D4303-10(2022) Standard Test Methods for Lightfastness of Colorants Used in Artists' Materials
• 2010 ASTM D4303-10(2016) Standard Test Methods for Lightfastness of Colorants Used in Artists' Materials
• 2010 ASTM D4303-10 Standard Test Methods for Lightfastness of Colorants Used in Artists'' Materials
• 2006 ASTM D4303-06 Standard Test Methods for Lightfastness of Colorants Used in Artists'' Materials
• 2003 ASTM D4303-03 Standard Test Methods for Lightfastness of Colorants Used in Artists'' Materials
• 1999 ASTM D4303-99 Standard Test Methods for Lightfastness of Pigments Used in Artists' Paints