However... After finishing this sculpt, before vacuum forming it became clear that I'd made a mistake with my sizing. I had made the sculpting base the same size as the head plate it would go on - 16cm - so after sculpting the face on top of it, it was too large to sit on the plate properly, and would overlap; especially once it had the 2 or 3mm extra from the vacuum formed plastic over the top of that. It was disappointing that I'd only realised this after sculpting an almost finished, cheeky expression. The next step was to take the eye semi-spheres out and start over on a new, appropriately sized base.
Then this happened. In my naivety, I hadn't put anything underneath the 1mm thick sculpting base, so when the vacuum suction was put on in the vacuum former, it gave way underneath and completely distorted the shape of the face beyond repair. I should have filled the back of the base with something like plaster or more clay, or at least put some sort of wooden form or shape underneath to stop it from collapsing in the middle. This accident cast has a certain pug-like look to it which is actually kind of cute and grumpy, but it's no good for Lolita. This mis-case has earned the name of Moon Face, and whilst it won't be a plate used for Lolita, I will be keeping it as a reminder to always support the back of a plastic sculpt base!