Färgindustrin

This document provides users with a basic understanding of the general minimum requirements for the available certificates, knowledge, skill level and competencies for persons operational in the field of inspection of paint, coatings, varnishes and related products on various substrates where the proper application and inspection is fundamental for the life expectancy of the paint and coating system, conformity to specifications and safety.

This document specifies a method for determining the dynamic surface tension of liquids based on the pressure in gas bubbles. The dynamic surface tension of solutions is influenced by surface-active molecules in the solution (often surfactants in water-based solutions). The surface tension is measured at a newly created interface depending on the age of this surface. This allows direct conclusions to be drawn about how quickly and strongly the surfactants in the solution reduce the surface tension of a new surface. The interface used to determine surface tension is renewed with each gas bubble. Due to the principle, very short measurement times in the millisecond range are possible, which makes the test method particularly suitable for surfactant-containing solutions of high concentration (significantly above the critical micelle concentration), e.g. in electroplating baths, cleaning baths, preferably low-viscosity Newtonian paints, inks. The sequence of air bubbles resulting from a gas volume flow enables continuous measurement without the sample having to flow through the measuring system. For the purpose of controlling surfactant concentration, surface tension is monitored at an appropriate, well-defined surface age.

This document specifies requirements against all significant hazards, hazardous situations and hazardous events relevant to booths for the application of coating material, when they are used as intended, including reasonably foreseeable misuse. See Annex A for significant hazards. This document also specifies recommendations for minimizing environmental impact of booths for the application of coating material. See Annex F for recommendations for minimizing environmental impact and energy usage. Interfaces between booths and other machinery used in application of coating material are given in Figure 1. The specific significant risks related to the use of this machinery with foodstuff and pharmaceutical products are not dealt with in this document. The specific significant risks related to drying operation of combined booths for application and drying of coating material are not dealt with in this document, but in EN 1539:2015. [Figure 1] This document is not applicable to: - spaces for application of coating material consisting only of an extraction wall; - platforms attached to booths (e.g. for touch-up jobs); - booths for application of flock (see EN 50223:2015); - airflow requirements for booths with airflow from horizontal inlet to vertical extraction. This document is not applicable to machinery manufactured before the date of its publication as European Standard.