![]() ![]() In this test the paint is spread uniformly on a defined test area ( 0.1 square meters ~ 1 square foot ) and the spreading rate is calculated from the weight and density of the applied coating. In order to calculate the spreading rate ASTM D 344 uses Forms 8H and 10H. For a constant drawdown ratio, they found that increasing the. The diagonal striped patterns or the checkerboard respectively have a strong visual impact and emphasize variations in film opacity. where Vs is the substrate speed, ds is the coating thickness, and m is the fluid viscosity. Spreading Rate Charts are large size drawdown charts, referred to as display or spreading rate charts, were designed for visual evaluation of hiding powder. ![]() ◆ Double film laminated will not warp and bend-even in high humidity environments. ◆ Superior adhesion properties and flexibility ◆ Package is shrink-wrapped with low permeability plastic to prevent moisture absorption during shipping and storage. ◆ Rugged design ( 0.5 mm thickness ) to prevent warping and bending after the coating is applied. ![]() ◆ Superior adhesion characteristics, especially with latex paints ◆ Repeatable color and gloss-lot after lot ◆ Guaranteed non-fluorescent paper in compliance with ASTM D 344 ◆ Are ideal for a wide range of coating systems: water and solvent borne technologies Therefore, BIUGED offers two types of drawdown cards and charts. The resin type requires different solvent types and dependent on the polarity of the solvent, the organic ingredients will be more or less activated. Selection of test charts dependent on coating technologyĭepending on the types of solvent used in paint formulations a drawdown chart needs to be more or less solvent resistant. Depending on the material properties of the product to be tested and its usage different types of drawdown cards are available. They are used for testing architectural, industrial, automotive, wood finishes or even cosmetic products ( e.g. Test charts are easy to use and an economical substrate to test a variety of coating properties, such as opacity, spreading rate, and flow& leveling behavior. Stringent equality control during the production process assures that they have the most consistent color and gloss in the industry. Gloss, hiding power, color, opacity, drying time, scrub. Many industries, including paints, coatings, inks, cosmetics, batteries, adhesives, and a host of others rely on draw downs of their products in their R&D and QC departments to ensure consistent worldwide quality of their products. BIUGED INSTRUMENTS offers a wide range of drawdown cards and charts for virtually any application and coating material. Why Use an Automatic Film Applicator / Drawdown Machine. ![]()
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