For those who have problems with frizzy curls, here are some suggestions right out of the 1950s:
There is one general rule that makes hair setting a success, whether your hair be long or short: it is not advisable to set your hair while it is wet. We hair that is allowed to dry during the curling process will emerge kinky and sausage-tight. A better method is to set your hair when it is dry and then wrap your head turban-fashion, with a towel that has been wrung out in very hot water. The steam from the towel will penetrate the rolled-up curls and dampen each slightly. This dampness will be sufficient to give each curl the required amount of moisture to make it set, but not so much that the curl is drowned.
Let the towel turban remain on your head for five minutes. Then remove it, and put a net around your head to hold the curls in place. Allow your hair about fifteen minutes' time to dry out completely. When you unfurl your curls, lo and behold, you will discover that your hair is soft and delicate, not frizzed. This curl, by the way, will withstand any amount of brushing. Don't be afraid to attack your hair after it has been set. Curl will not come out if it has been properly set and if the hair is truly dry.