Using plastic forms is not a method of curing concrete; it is a molding technique. The actual methods for curing include maintaining moisture with wet coverings, heated forms for accelerated curing, and plastic sheets to retain moisture.
The methods of curing concrete involve processes that maintain adequate moisture, temperature, and time for the hydration of cement and proper hardening of the concrete. Keeping the surface moist is done to prevent the water in the concrete from evaporating too quickly. Heated forms are used to accelerate the curing process in cold weather. Covering with plastic sheets helps to retain moisture on the concrete surface. However, using plastic forms is not a method of curing; it is a technique for molding the concrete into shape while it cures.
So, using plastic forms is not a method of curing concrete but rather a formwork technique.