Weigh 600 ± 0.05 g vinyl ester adhesive in cup (500 ml). Add 2.0% ~ 12 ± 0.02g peroxide. Immediately connect the thermo couple to the data logger (at that time the thermo couple is not in the adhesive, but as the thermo couple is connected to the data logger the time is registered). Then stir the mixture thoroughly for minimum 1 minute using spatula, and scrape it (spatula) at minimum 2 times during mixing. Hold the cup from the top during mixing in order to avoid heat from hand.