Why is the film harder to cut with a plotter in the morning?

Why is the film harder to cut with a plotter in the morning?

In the morning a PVC film is always harder due to the lower night temperatures: the PVC being a thermoplastic is sensitive to temperatur influencing the workability of the film with cutting, removal and application. If possible it is advisable to keep the temperature of the warehouse never below 15-18°C.