When done unconsciously, it's to blow little fuzz bits or crumbs off your fingertips, and then buff them on your clothes. As a deliberate gesture, it is used to show a feeling of superiority and...
Up to one week if your lucky, two weeks if your dog has a lot of unwanted hair.
blow ratio is the ratio of mold diameter to the preform diameter.
Ummm IDK LOL IM Bore