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A test patch should be as clean as possible. Contamination of a patch can influence the results significantly. Bresle patch injected with 15ml water as in ISO 8502-6 Annex A. The ISO 8502-6 standard prescribes in annex A that certified patches shall be used. This annex describes a stress test to ensure patch adhesion and wash ability.
In the paint and coating industries, paint adhesion testing is often used to determine if the paint or coating will adhere properly to the substrates to which they are applied. Several tests measure the resistance of paints and coatings from substrates: cross-cut test, scrape adhesion, pull-off test , and others.
Water continues to permeate into the region. As the soluble substance dissolves under the paint layer, the pressure caused by the increase in volume can exert a greater force than the paint adhesion and cohesion forces, giving rise to the formation of a blister; the process called osmotic blistering.
The below calculated ACIs were done on solvent-based primer containing 350 g/L of solvents and the water-based primer containing 50 g/L of butyl glycol. The values on this chart indicate that the use of mineral spirits based primers would need 6 to 7 air changes per hour requiring significant ventilation. The use of low-odor, isoparaffinic ...
The encasement product has undergone extensive testing for fire rating, water vapour transmission, adhesion and cohesion, mold growth, ageing and weathering, elongation, etc. The technical data sheet includes a listing of these tests and other ASTM tests, government approvals, acceptances, and listings.
Water-based makeup appeared after the end of World War II, with emulsifiers that could successfully keep a water-and-oil blended emulsion stable being the key to their development. This creamy liquid provided medium coverage with a far more natural feel and appearance than oil, powder, or emollient bases of the time, and became popular with ...
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In the wetting tension test, several liquids of different surface energies are applied to the surface. The liquid with the lowest surface energy, which wets the tested surface, defines the surface energy of the latter. A drop of liquid with known surface energy, e.g. distilled water, is applied to the tested surface.