|The wig before being tested for curling|
Synthetic wigs that are heat resistant can be curled or straightened, easily; if the precautions are observed. Using the same iron you imply for straightening human hair , a synthetic wig can be beautifully curled. All you need to do is to be careful about the heat settings. Synthetic wigs can also be curled using hot water.
Curling a synthetic wig using boiled water is the safest method; as it does not melt down or fuse the plastic fibers. Generally, this method is used when you don't want your wig to keep the desired style for long. Synthetic wig curled this way is prone to lose the bounce and style comparatively quickly than the curling done by straightening iron.
Check out the complete tutorial on curling a synthetic wig using boiling water