Standarder: ASTM D2100, ASTM D4212, BS 3900, DIN 53211, NF T030-014, ISO 2431
The TQC Viscosity Calculator 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 viscometer.