Buck indispensable to correctly sized Part 3 hockey mask?

Given that most if not all media used to cast a buck would shrink to some degree, meaning that the buck made in the process of creating the screen used Part 3 masks surely did, is it absolutely obligatory to carry out that process in order to wind up with a mask (all other steps being replicated fully) that is the same size as the screen used masks?

Stupid question, maybe, but why is it called a “Buck” now? This is the second time I’ve heard this. For years I’ve only ever heard them called Hocks.

Well, it actually has nothing to do with hockey masks specifically. A buck is the positive form used to vacuum form anything.

Ah, interesting. Thank you.

No problem!