I was curious as to why the bleach/developer needs to be blow dried after it is applied to the lace base. Wouldn't this potentially blow the bleach/developer into the hairshafts? Or does it let the bleach/developer dry quicker so that it doesn't leak onto the hairshafts? Or what exactly is the purpose? Should the blow dryer be kept well away from the lace so as not to blow the bleach/developer into the hairshafts? Also, is a typical blow driers hot setting suitable for this?

Thanks for any help.
-James