oSIST prEN ISO 15110:2026

SLOVENSKI STANDARD
01-oktober-2026
Barve in laki - Umetno vremensko staranje, vključno s kislimi padavinami (ISO/DIS
15110:2026)
Paints and varnishes - Artificial weathering including acidic deposition (ISO/DIS
15110:2026)
Beschichtungsstoffe - Künstliches Bewittern mit saurer Beanspruchung (ISO/DIS
15110:2026)
Peintures et vernis - Vieillissement artificiel comportant un dépôt acide (ISO/DIS
15110:2026)
Ta slovenski standard je istoveten z: prEN ISO 15110
ICS:
87.040 Barve in laki Paints and varnishes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 15110
ISO/TC 35/SC 9
Paints and varnishes — Artificial
Secretariat: BSI
weathering including acidic
Voting begins on:
deposition
2026-09-09
Peintures et vernis — Vieillissement artificiel comportant un
Voting terminates on:
dépôt acide
2026-12-02
ICS: 87.040
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document has not been edited by the ISO Central Secretariat.
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NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 15110:2026(en)
DRAFT
ISO/DIS 15110:2026(en)
International
Standard
ISO/DIS 15110
ISO/TC 35/SC 9
Paints and varnishes — Artificial
Secretariat: BSI
weathering including acidic
Voting begins on:
deposition
Peintures et vernis — Vieillissement artificiel comportant un
Voting terminates on:
dépôt acide
ICS: 87.040
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document has not been edited by the ISO Central Secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2026
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
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BE CONSIDERED IN THE LIGHT OF THEIR
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Published in Switzerland Reference number
ISO/DIS 15110:2026(en)
ii
ISO/DIS 15110:2026(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 2
5.1 General .2
5.2 Laboratory radiation sources.2
5.3 Test chamber. .2
5.4 Wetting system. .2
5.5 Specimen holders. .3
5.6 Black standard or black panel thermometer. .3
5.7 Humidity sensor. .3
5.8 Acid spray device.3
5.9 Radiometer. . .3
6 Solutions for artificial acidic deposition . 3
7 Test specimens . 4
7.1 General .4
7.2 Specimen size . . .4
7.3 Corrosion of the substrates .4
7.4 Reference specimens .4
8 Designation of test type . . 4
9 Procedure . 5
9.1 General .5
9.2 Wetting and relative humidity .5
9.3 Acid spraying .5
9.4 Weathering cycles .5
9.5 Test duration .7
9.6 Further weathering of specimens .8
10 Assessment of results . 8
11 Precision . 8
11.1 General .8
11.2 Repeatability .8
12 Test report . 9
Annex A (informative) Background information .11
Bibliography . 14

iii
ISO/DIS 15110:2026(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent
rights identified during the development of the document will be in the Introduction and/or on the ISO list of
patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the World
Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL:
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee
SC 9, General test methods for paints and varnishes in collaboration with the European Committee for
Standardization (CEN) Technical Committee CEN/TC 139, Paints and varnishes, in accordance with the
Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 15110:2017), which has been technically
revised. The main changes compared to the previous edition are as follows:
— exposure conditions have been added for both xenon and fluorescent UV devices that are more suitable
to capabilities of commercially-available instruments;
— alternative acid solutions have been added for consistency with other standards and to prevent damage
to test instruments.
iv
ISO/DIS 15110:2026(en)
Introduction
This document specifies a method of simulating the damaging effect of outdoor weathering with relevance
to acidic atmospheric precipitation on painted products. The mechanisms differ from those of harmful
gases, which essentially constitute the initial products of acidic precipitation.
Arising from changing industrial air pollution and additionally diffused by the stochastic wind and cloud
distribution, acidic precipitation occurs sporadically. Thus, especially regarding acidic precipitation, outdoor
weathering effects vary enormously within different years. Therefore, it is practically impossible to obtain
reliable outdoor exposure results from just one season. These fluctuations can be avoided through the use of
a laboratory test where all weathering parameters, including the acidic deposition, can be controlled.
[1]
The method is based on VDI Guideline VDI 3958-12 .

v
DRAFT International Standard ISO/DIS 15110:2026(en)
Paints and varnishes — Artificial weathering including acidic
deposition
1 Scope
This document specifies a so-called acid dew and fog test (ADF test) as an accelerated laboratory test
method for simulating, by the use of artificial acidic precipitation, the damaging effects of acidic atmospheric
precipitation in association with UV radiation, neutral condensed precipitation, and changing temperature
and humidity. This test method is intended to be used in evaluating, on the basis of relative performance
rankings, the suitability of painted materials for use in outdoor environments with acidic precipitation. It is
not intended to generate the same extent of damage or the same damage pattern as in outdoor weathering,
but rather to give a ranking which is similar to that which would be obtained in outdoor weathering. The
method produces damage which is more homogeneous, allows fewer specimens to be exposed (and hence
more rapid testing) and enables evaluation of the exposed specimens to be carried out using methods which
are more objective than visual assessment.
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 4618, Paints and varnishes — Vocabulary
ISO 16474-1, Paints and varnishes — Methods of exposure to laboratory light sources — Part 1: General guidance
ISO 16474-2, Paints and varnishes — Methods of exposure to laboratory light sources — Part 2: Xenon-arc lamps
ISO 16474-2:2013, Paints and varnishes — Methods of exposure to laboratory light sources — Part 2: Xenon-arc
lamps
ISO 16474-3, Paints and varnishes — Methods of exposure to laboratory light sources — Part 3: Fluorescent UV
lamps
ISO 16474-3:2021, Paints and varnishes — Methods of exposure to laboratory light sources — Part 3: Fluorescent
UV lamps
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 4618 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/
4 Principle
The combined action of solar UV radiation, heat, humidity, wetting and acidic deposition is simulated in
[2] [3]
weathering devices similar to those described in ISO 4892-2 and ISO 16474-2 for xenon-arc lamps and
[4] [5]
in ISO 4892-3 and ISO 16474-3 for fluorescent UV lamps.

ISO/DIS 15110:2026(en)
Included in the artificial exposure is an acidic exposure, which is accomplished by a once-per-day spraying of
acid. The aim of this test is not to reproduce the visual damage patterns which result from outdoor exposures,
which show a very widespread distribution that is hard to evaluate. Rather, the aim is to reproduce the same
ranking which would be obtained with an outdoor exposure, by causing damage by the same mechanisms
but creating a homogeneous distribution on a smaller scale that can be evaluated in an objective way.
Accelerated weathering is achieved by the serial arrangement of the worst conceivable combinations of
environmental conditions for the object under test (referred to hereafter as the “worst-case scenario”). This
is accomplished by reproducing these environmental conditions in a more compressed sequence than would
be the case outdoors and by including artificial acidic precipitation. However, the values of the environmental
conditions used do not significantly exceed those encountered in practice outdoors.
5 Apparatus
5.1 General
For this test, weathering devices as specified in either ISO 16474-2 or ISO 16474-3 shall be used. The test
chamber, as well as the specimen holders, shall be made of acid- and UV-resistant materials.
5.2 Laboratory radiation sources
5.2.1 Fluorescent UV lamp apparatus, in accordance with that specified for ISO 16474-3:2021, method A,
using UVA-340 lamps.
For a fluorescent UV lamp apparatus giving the spectral distribution specified for ISO 16474-3:2021,
−2
method A, a UV irradiance of: E = (45 ± 5) W⋅m , constant over time and uniformly applied to the
UV
specimens in the weathering device, shall be achieved in the spectral range 290 nm to 400 nm; or
–2 –1
E = (0,76 ± 0,08) W⋅m ⋅nm at 340 nm.
λ
5.2.2 Xenon-arc lamp apparatus, in accordance with that specified for ISO 16474-2:2013, method A.
Irradiance uniformity shall be in accordance with the requirements specified in ISO 16474-1. For a xenon-
arc lamp apparatus, equipped with daylight optical filters, giving the spectral distribution specified for
−2
ISO 16474-2:2013, method A, the UV irradiance shall be E = (60 ± 5) W⋅m in the spectral range 300 nm
UV
to 400 nm.
NOTE ISO 16474-2 classifies Daylight optical filters into Type I and Type II, with a General classification that
includes both. Type I Daylight filters provide a better match to natural outdoor sunlight. Type II Daylight filters
transmit shortwave UV radiation not present on earth’s surface, but can be used to match historical results from
filters made from borosilicate glass.
5.3 Test chamber.
The design of the test chamber may vary, but it shall be constructed from inert material, meeting the
requirements of ISO 16474-1 and ISO 16474-2 or ISO 16474-3, respectively. For xenon-arc lamp apparatuses,
the test chamber shall provide for control of both black standard temperature and chamber air temperature,
meeting the requirements of ISO 16474-1. For fluorescent UV apparatuses, the test chamber shall provide for
control of either black standard temperature, black panel temperature, or chamber air temperature, meeting
the requirements of ISO 16474-1. When specified herein, humidity control shall also meet the requirements
of ISO 16474-1. Devices shall also produce water spray. Water used for the water spray shall meet the purity
requirements of ISO 16474-1.
5.4 Wetting system.
The test chamber shall be equipped with a means of introducing an intermittent spray of water onto the
front of the test specimens, under specified conditions. The spray system shall be made from corrosion-
resistant materials that do not contaminate the water employed.

ISO/DIS 15110:2026(en)
The water spray system in xenon-arc lamp instruments shall be as specified in ISO 16474-2.
5.5 Specimen holders.
The specimen holders shall be made from inert materials that will not affect the test results, for example
non-oxidizing alloys of aluminium, or stainless steel. Brass, steel or copper shall not be used.
5.6 Black standard or black panel thermometer.
The black standard thermometer or black panel thermometer (for fluorescent UV apparatuses) used shall
comply with the requirements for these devices that are given in ISO 16474-1.
5.7 Humidity sensor.
If required, relative humidity shall be measured and controlled in accordance with ISO 16474-1.
5.8 Acid spray device.
A manually operated atomizer or an automatic spraying device may be used. Consult equipment
manufacturer for information on in-chamber acid spraying capability and durability.
5.9 Radiometer.
When a radiometer is used, it shall comply with the requirements of ISO 16474-1.
6 Solutions for artificial acidic deposition
Several different acidic solutions may be used in this test, depending on level of chamber corrosion resistance
and desired aggressiveness of test:
— Prepare an acid mixture with a pH of 1,5 at (25 ± 2) °C by dissolving 10,6 g of H SO , 3,18 g of HNO and
2 4 3
1,80 g of HCl in 10 l of distilled or deionized water (this gives a mass ratio of 1,0:0,3:0,17). These quantities
refer to acids with a calculated concentration of 100 %. Depending on the mass concentrations of the
acids available, larger quantities of acid might shall be weighed out (e.g. if 36 % HCl is used, the quantity
will have to be 1,8/0,36 = 5,0 g). Analytical-grade acids shall be used.
— Prepare a solution with a pH of 2,5 by diluting the pH 1,5 solution with distilled or deionized water by a
volume ratio of 1:10.
— Prepare an acid solution with a pH of 3,3 to 3,5 at (25 ± 2) °C by dissolving 15,0 g of H SO , 2,2 g of HNO ,
2 4 3
2,5 g of NaOH, 1,8 g of CaCl , and 1,0 g of KCl in 977,5 g of distilled or deionized water. This solution is
[6]
described in ASTM D7356 .
The pH 2,5 solution is the historically-used solution for this document. However, either the more aggressive
pH 1,5 solution or a less-acidic pH 3,3 to 3,5 solution may be used if agreed upon by the interested parties.
If either the pH 1,5 solution or the pH 3,3 to 3,5 solution is used, this shall be mentioned in the test report.
Before starting the exposure, check the pH-value of the solution using, for instance, pH test strips. If it
deviates by more than pH 0,3 from the theoretical value, replace the solution.
To avoid changes in the pH-value of the solution, store it in an airtight container.
Acid spraying may be carried out either manually or automatically (see 9.3).

ISO/DIS 15110:2026(en)
7 Test specimens
7.1 General
All specimens shall be permanently marked.
NOTE The specimens will be delivered by a customer or specifically prepared for this test or taken from a building
[7] [8]
component. Guidelines for preparation are given in ISO 1514 . Guidelines for sampling are given in ISO 15528 .
7.2 Specimen size
The specimen size shall be such that the condition of the specimens can be unambiguously ascertained
before and after the ADF test.
Due to the homogeneity of the damage on exposed specimens, only relatively small areas shall be evaluated.
The minimum exposed surface area shall be 30 cm , with the shortest edge at least 50 mm in length. This
reduces local variation in the acid deposition (e.g. due to the spraying procedure or edge effects).
7.3 Corrosion of the substrates
If possible, the substrate used should be the same as that to which the coating material will be applied in
practice. It shall be made, as far as possible (see below), from inert material.
If the possibility of corrosion or delamination at the edges cannot be excluded, suitable edge protection
should preferably be provided. Also, exposed edges and substrate surfaces that might react with acidic
precipitation (e.g. those made of non-stainless steels, aluminium, copper, zinc or concrete) should be suitably
protected.
7.4 Reference specimens
The use of reference specimens is recommended for assessing the repeatability. Reference specimens of the
same type of material as employed in previous test series should be used.
If possible, these reference specimens should be made of materials which do not change with time (i.e. do not
age) under normal storage conditions.
8 Designation of test type
Exposures carried out under conditions corresponding to the subtropical climate of Jacksonville in Florida
(i.e. those of type J as defined in Table 1) are designated:
ISO 15110, ADF-J test
Exposures carried out under conditions corresponding to a moderate climate like that of central Europe (i.e.
those of type M as defined in Table 2) are designated:
ISO 15110, ADF-M test
Exposures carried out without humidity control (i.e. tho
...