ISO Type 2 An economical white plaster formulated for general purpose laboratory use. Improved to provide a creamier mix consistency. Available in both regular set and fast set. Physical Properties Water/Powder Ratio: 45 mL/100 g powder Working Time: 5 – 7 minutes Setting Time: 14 minutes Setting Expansion: 0.20% Compressive Strength, Wet (1hr.): 1,500 psi (10 MPa) Compressive Strength, Dry (48 hrs.): 3,300 psi (23 MPa)