ISO 28199-1:2021 pdf download – Paints and varnishes — Evaluation of properties of coating systems related to the spray application process — Part 1: Vocabulary and preparation of test panels.
1 Scope This document defines terms relating to the evaluation of coating materials in research, development and production with regard to their suitability and safety for industrial processes and error analysis. This document also specifies methods for the preparation of test panels and the subsequent measurement of film thickness, colour, surface texture and other measurable surface properties. 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 1513, Paints and varnishes — Examination and preparation of test samples ISO 2808, Paints and varnishes — Determination of film thickness ISO 3270, Paints and varnishes and their raw materials — Temperatures and humidities for conditioning and testing ISO 15528, Paints, varnishes and raw materials for paints and varnishes — Sampling ISO 18314-1, Analytical colorimetry — Part 1: Practical colour measurement ISO 28199-2, Paints and varnishes — Evaluation of properties of coating systems related to the spray application process — Part 2: Colour stability, process hiding power, re-dissolving, overspray absorption, wetting, surface texture and mottling ISO 28199-3, Paints and varnishes — Evaluation of properties of coating systems related to the spray application process — Part 3: Visual assessment of sagging, formation of bubbles, pinholing and hiding power 3? Terms? and? definitions For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — ISO Online browsing platform: available at https:// www .iso .org/ obp — IEC Electropedia: available at http:// www .electropedia .org/
3.1 bubble closed or already burst blister in a layer, arising when solvents or cleavage products evaporate from chemical crosslinking Note 1 to entry: If bubbles are caused by the process control, the formulation components or both, the viscosity of the paint film has increased too rapidly during the drying phase so that solvents or reaction products still in the paint film have built up at the polymer paint skin which forms, usually resulting in closed blisters and sometimes resulting in burst blisters. Discontinuities can be identified in more detail using a cross-section. 3.2 colour stability non-variability, or variability within agreed tolerances, of colour despite variation of influencing factors Note 1 to entry: Examples of influencing factors are thickness and application method. 3.3 measurement pattern distance between individual measurements on the test panel in the dx and dy directions 3.4 mottling non-uniform appearance of a film caused by the presence of irregularly shaped, randomly distributed areas on the surface that vary in colour and/or gloss [SOURCE: ISO 4618:2014, 2.160] 3.5 overspray absorption ability of a coating material already applied to absorb overspray particles of the same coating material resulting from a subsequent application Note 1 to entry: Evidence of poor overspray absorption is shown, for example, by raised surface texture (3.12) and low colour stability (3.2) as well as mottling (3.4).