![]() ![]() 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. The diagonal striped patterns or the checkerboard respectively have a strong visual impact and emphasize variations in film opacity. 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. The Motorised Automatic film applicator or drawdown machine provides a reliable basis to apply coating films to test charts, panels or foils in a uniform. ◆ Superior adhesion characteristics, especially with latex paints ◆ Repeatable color and gloss-lot after lot The Mayer Rod Drawdown Method is an industry standard under TAPPI Test Method T 552: Determination of Wetting Tension of Polyolefin Films and Coated. ◆ 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. BIUGED INSTRUMENTS offers a wide range of drawdown cards and charts for virtually any application and coating material.
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