ISO 28199-3:2021 塗料とワニス—スプレー塗布プロセスに関連するコーティングシステムの特性の評価—パート3：たるみ、気泡の形成、ピンホールおよび隠蔽力の評価 | ページ 2

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.

The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, 1. In particular, the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, 2 (see www.iso.org/directives ).

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 of 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 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 second edition cancels and replaces the first edition (ISO 28199-3:2009), which has been technically revised.

The main changes compared to the previous edition are as follows:

• the terms bubble formation limit and cratering have been moved from ISO 28199-1 to this document;
• assessment using measuring techniques was added for all evaluations;
• process hiding power (see Clause 7) was changed to hiding power;
• 3-D photographs and the associated profiles have been included for bubbles and pinholes;
• the normative references have been updated;
• the document has been editorially revised.

A list of all parts in the ISO 28199 series can be found on the ISO website.

Introduction

In many areas (e.g. car manufacture, industrial coatings, coatings for plastics) the coating materials used are adapted to the specific application equipment and technologies of the particular user. A coating material is, therefore, to be understood as a semi-manufactured product that only receives its final form in combination with the specific application conditions. The adaptation to the application conditions is therefore decisive for the quality of the coated product.

The test methods specified in the ISO 28199 series are based on studies by a Working Group of the European Council for Automotive R&D (EUCAR).

They may be used for evaluation of coating materials in research, development and production with regard to their suitability and safety for industrial processes, and error analysis. The properties of coating materials and coatings to be evaluated depend on the film thickness, so a coating system of increasing thickness is applied to a test panel under defined conditions.

The following characteristics are measured (see ISO 28199-1):

• film thickness in accordance with ISO 2808;
• surface texture;
• colour in accordance with ISO 18314-1;
• mottling;
• gloss in accordance with ISO 2813.

The following properties are determined in combination with visual assessment or, if necessary, optical measurement techniques:

• colour stability/colour evaluation, process hiding power, re-dissolving, overspray absorption, wetting, surface texture and mottling (see ISO 28199-2);
• tendency to sagging, formation of bubbles, pinholing and hiding power (this document).

1 Scope

This document specifies visual methods for the assessment of tendency to sagging, formation of bubbles, pinholing and hiding power of coating materials applied to a test panel under defined conditions, using spray application process. Assessment using measuring techniques is also described for all evaluations.

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.

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 28199-1 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

Bibliography