Every dated rule the studios are built on, in one place and in plain language: what an object was obliged to carry, what its press could physically do, what paper it was on, which single detail dates it to a decade — and, in the Screen & stage shelf, what of it reads on camera and from the tenth row. It is the research an art department would otherwise spend a fortnight repeating — and it belongs to whoever wants to use it.
Every entry in the seven object families was extracted from a working generator, which means every one of them was believed by somebody — and none of them has a citation attached. The Screen & stage entries were written by hand and carry a source where a public one exists; the rest of them are workshop practice, and say so by leaving the field empty. That is the honest state of it, and it is the part you can fix. An entry with a source behind it is something a production office can put in a file; an entry without one is a recollection.
Corrections and additions go to research@chronotype.design, or use the link on any entry below. The rules are on the contribute page.