ISO 22516:2019 pdf free

ISO 22516:2019 pdf free.Paints and varnishes – Practical determination of non-volatile and volatile matter content during application
An aluminium foil or a test panel in production or in laboratory spray booth is coated in accordance with the specified conditions. The coated aluminium foil or test panel is carefully folded down the centre and weighed after the process step of examination and then unfolded. Subsequently, the aluminium foil is dried in horizontal position in a laboratory drying box in accordance with the agreed drying conditions and weighed afterwards. The content of non-volatile or volatile matter is calculated from the difference.
The determination of non-volatile and volatile matter can be carried out directly on the coating object during the coating process in production or in the laboratory spray booth. Method A is appropriate for both coating locations, whereas method B should be restricted to the application in the laboratory spray booth. Only for the procedure of handling method A, a contamination of the recently applied coatings can be avoided.
Carefully fold the coated aluminium foils down the centre after the process step of examination and fold in the open sides to avoid further evaporation of solvents. Weigh the folded aluminium foils (mp).Unfold the aluminium foils after weighing. Subsequently, dry the aluminium foils in a laboratory drying box in accordance with the agreed drying conditions. In order to do so, roll up the foils loosely and, in a tin jar, dry upright. Cool down to room temperature in a dust-free environment.
The reproducibility limit R is the value below which the absolute difference between two single test results (each the mean of valid duplicates) can be expected to lie when this method is used under reproducibility conditions. In this case, the test results are obtained on identical material by operators in different laboratories using the standardized test method. In this standard, the reproducibility limit R with a probability of 95 % is given in Table 2.ISO 22516 pdf free download.