ISO 3668:2017 PDF
Paints and varnishes — Visual comparison of colour of paints
Paints and varnishes — Visual comparison of colour of paints
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 8
- Дата публикации:
- 29 мая 2017 г.
- Издание:
- ISO IS 3668 edition 3 version 1
- ICS:
- 87.040
ISO 3668:2017 specifies a method for the visual comparison of the colour of films of paints or related products against a standard (either a reference standard or a freshly prepared standard) using artificial light sources in a standard booth. It is not applicable to coatings containing special-effect pigments, e.g. metallic, without previous agreement on all details of illuminating and viewing conditions
Abstract
Overview
ISO 3668:2017 - "Paints and varnishes - Visual comparison of colour of paints" specifies a standardized method for visually comparing paint film colours against a reference standard using controlled artificial illumination in a colour‑matching booth. The standard defines illumination options (CIE standard illuminant D65, A or FL11), observer selection, test panel preparation and handling, viewing geometry and procedures for assessing colour differences and metamerism. It excludes special‑effect pigments (e.g. metallics) unless viewing and illumination conditions are agreed in advance.
Key topics and technical requirements
- Illumination and booth: Use a colour‑matching booth that excludes external light and approximates CIE illuminant D65 (primary), with alternatives CIE A or fluorescent FL11 for metamerism checks. Illumination level should be 1 000–4 000 lx (higher for dark colours). Booth interior is generally a matt neutral grey (L* ≈ 45–55; a*, b*
Технические детали
- Технический комитет
- ISO/TC 35/SC 9 - General test methods for paints and varnishes
- SKU
- ISO 3668:2017
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