If he tries to remove it, it will clasp even tighter... however, it doesn't break the skin, and there's no danger of fluid exposure.

The experiments involve different branches of Mechanical Engineering knowledge, so we try to assign the students for maximum exposure to heat transfer, dynamics, thermo, fluid mechanics, etc.

The frac balls disintegrate over time by exposure to brine fluids, so the disintegration occurs with most fracturing and wellbore fluids and no special fluid mixture is required.