JIS K 5600-2-3:1999

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This Standard specifies the general procedure to be followed in determining the dynamic viscosity of paints, varnishes and related products at a rate of shear not less than 5000 s-1 and not higher than 20000 s-1. When the viscosities of products are being compared the rate of shear shall be approximately the same. The determination shall be made at a closely controlled temperature, 23 plus and minus 0.2 degree C unless otherwise agreed. The value obtained gives information about the resistance of the material to brushing during the initial application period; no information is obtained, however, on the changes resulting from evaporation of solvents from the paint. The method specified in this Standard is suitable for all brushing paints and varnishes whether they are Newtonian in behaviour or not. Furthermore, because of the narrow gap between the stationary and rotary parts of high shear viscometers, the method is more reproducible for paints having low values for fineness of grind, as determined by JIS K 5600-2-5.