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JIS Standard Design at the construction site
Rapid measurement of painting paint viscosity convenient to use

The Iwata cup is based on the Japan method of liquid viscosity measurement. It has a taper orifice with the internal diameter of 50mm to the external diameter 86mm. However, the procedure of usage is the same as that of the Zahn Cups.

Main Technical Parameters:

  1. Internal Vertical Height: 43±0.1mm
  2. Internal Orifice: 3.81±0.5mm
  3. External Orifice: 6.0±0.5mm
  4. Internal Diameter: 50±0.5mm
  5. Outer Diameter: 86±0.1mm
  6. Operating Temperature: 10±0.1mm
  7. Centistokes Range: 70 to 370
  8. Efflux Time: ±0.2s


  1. Immerge the viscosity cup into the fluid, and make sure the cups upper edge lower the level surface of the fluid;
  2. Take the cup upright out of the fluid, and press the stopwatch at the same time;
  3. Press the stopwatch again when the flowing stream appear the first breaking-off;
  4. Repeat the above-mentioned procedure twice for precise evaluation;
  5. Average the total three testing values as the flow speed or viscosity of the fluid.


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