The TQC Viscosity Disc is an indicative conversion table relating viscosity (in Cst) to flow time of different cups. Printed on the front is the No.4 complying with BS-NF-ASTM-Din and Zahn 2, on the back ISO no.’s 3-4-5-6 and Zahn 3 as well as the Gardner viscosimeter.

VF2053
TQC Viscosity Disc