This standard specifies methods for the exposure of rubber materials to natural or artificial weathering and methods for the determination of changes in colour, appearance and physical properties resulting from exposure.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB 250 Gray Scale for Assessing Change in Colour (GB 250-1995, idt ISO 105-A02: 1993)
GB/T 2941 Rubber - General Procedures for Preparing and Conditioning Test Pieces for Physical Test Methods (GB/T 2941-2006, ISO 23529：2004, IDT)
GB/T 7762 Rubber, Vulcanized or Thermoplastic - Resistance to Ozone Cracking - Static Strain Test (GB/T 7762-2003, ISO 1431-1: 1989, MOD)
GB/T 11186.1 Methods for Measuring the Colour of Paint Films - Part 1: Principles (GB/T 11186.1-1989, eqv ISO 7724-1: 1984)
GB/T 11186.2 Methods for Measuring the Colour of Paint Films - Part 2: Colour Measurement (GB/T 11186.2-1989, eqv ISO 7724-2: 1984)
GB/T 11186.3 Methods for Measuring the Colour of Paint Films - Part 3: Calculation of Colour Differences (GB/T 11186.3-1989, eqv ISO 7724-3: 1984)
GB/T 16422.1 Plastics - Methods of the Exposure to Laboratory Light Sources - Part 1: General Guidance (GB/T 16422.1-2006, ISO 4892-1: 1999, IDT)
GB/T 16422.2 Plastics - Methods of the Exposure to Laboratory Light Sources - Part 2: Xenon-arc Sources (GB/T 16422.2-1999, idt ISO 4892-2: 1994)
GB/T 16422.3 Plastics - Methods of the Exposure to Laboratory Light Sources - Part 3: Fluorescent UV Lamps (GB/T 16422.3-1997, eqv ISO 4892-3: 1994)
GB/T 16422.4 Plastics - Methods of the Exposure to Laboratory Light Sources - Part 4: Open-flame Carbon-arc Lamps (GB/T 16422.4-1996, eqv ISO 4892-4: 1994)
ISO 877: 1994 Plastics - Methods of Exposure to Direct Weathering, to Weathering Using Glass-filtered Daylight, and to Intensified Weathering by Daylight Using Fresnel Mirrors
3 Terms and Definitions
For the purposes of this standard, the following terms and definitions apply.
3.1
control
in weathering test, the term "control" currently has three widespread uses:
a) a material which is of similar composition and construction to the test material, has a known response to the exposure conditions and is exposed at the same time for comparison.
