ISO/PRF 4211-7

Final draft ISO/PRF 4211-7:2026(en)
ISO/TC 136
Secretariat: UNI
Date: 2026-05-2109-11
Furniture — Tests for surface finishes —
Part 7:
Assessment of resistance to light
DIS stagePROOF
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Contents
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
4.1 General. 2
4.2 Choice of methods . 2
5 Apparatus and materials . 2
6 Preparation and conditioning . 4
6.1 Storing and conditioning . 4
6.2 Test surface . 4
7 Procedure . 6
7.1 Preparation of test surface . 6
7.2 Test procedure . 7
8 Assessment of results . 7
9 Test report . 8
Bibliography . 10

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Foreword
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This document was prepared by Technical Committee ISO/TC 136, Furniture.
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Furniture — Tests for surface finishes —
Part 7:
Assessment of resistance to light
1 Scope
This document specifies a method for the assessment of the effects of light in indoor conditions, by exposure
to artificial radiation.
This document is applicable to rigid surfaces of all finished products regardless of material.
It does not apply to finishes on leather and fabrics.
The test is intended to be carried out on a part of the finished furniture, but can be carried out on test panels
of the same material, finished in an identical manner to the finished product, and of a size sufficient to meet
the requirements of the test.
This document describes the most important parameters, such as the colour change when a surface is exposed
and specifies the conditions to be used in the exposure apparatus.
The light resistance of a surface can be assessed by using two apparatus as specified in Clause 4, one as a
reference test method, and the other for in-company testing.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 105-A02, Textiles — Tests for colour fastness — Part A02: Grey scale for assessing change in colour
ISO 105-B02:2014, Textiles — Tests for colour fastness — Part B02: Colour fastness to artificial light: Xenon arc
fading lamp test
ISO 4892-1, Plastics — Methods of exposure to laboratory light sources — Part 1: General guidance and
requirements
ISO 4892-2:2013, Plastics — Methods of exposure to laboratory light sources — Part 2: Xenon-arc lamps
ISO 4892-2:2013/Amd 1:2021, Plastics — Methods of exposure to laboratory light sources — Part 2: Xenon-arc
lamps — Amendment 1: Classification of daylight filters
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1
test panel
panel including the test surface (3.2)
Note 1 to entry: It can be cut from a finished item of furniture or it can be a separate panel produced in the same manner
as the finished item of furniture.
3.2
test surface
part of the test panel including an exposed section as well as the control sections
Note 1 to entry: See Figure 1 and Figure 2.
4 Principle
4.1 General
Accelerated exposure to light of furniture surfaces to filtered xenon-arc radiation is carried out in order to
assess the change of contrast and colour. The surface is assessed by comparing the exposed section with the
masked control section or with the separated control section (see Clause 8) from the same test surface.
4.2 Choice of methods
The apparatus specified in 5.1 shall be used as a reference method in cases where the influence of humidity
cannot be excluded.
The apparatus specified in 5.2 can be used for in-company testing in cases where the influence of humidity
can be excluded.
5 Apparatus and materials
The following apparatus and materials shall be used.
5.1 Apparatus with humidity control.
A test device as specified in ISO 4892-1, ISO 4892-2:2013 and ISO 4892-2:2013/Amd 1:2021 with xenon lamp
using window glass filters according to method B in ISO 4892-2:2013 and ISO 4892-2:2013/Amd 1:2021, and
test parameters, as specified in Table 1.
Table 1 — General conditions for the apparatus with humidity control
Irradiance
Broadband Narrowband Black-standard Chamber Relative
(300 nm to 400 nm) (420 nm) temperature temperature humidity
2 2 a
W/m W/(m × nm) °C °C %
50 ± 2 1,10 ± 0,02 55 ± 3 38 ± 3 50 ± 10
a A black-standard sensor in accordance with ISO 4892-1 shall be used (with insulation on the backside of the black metal sheet).
5.2 Apparatus without humidity control.
A test device as specified in ISO 4892-1, ISO 4892-2:2013 and ISO 4892-2:2013/Amd 1:2021 with xenon lamp
using window glass filters according to method
...