I'm in a book arts program at a school that has both metal type and polymer plates for printing letterpress. I'm looking for more information on the digitizations of originally metal type. I'm concerned with the fact that most digital fonts don't have optical scaling, whereas most metal faces did (although does anyone know of any detailed information on optical scaling of metal types? There is some information in Richard Southall's Printer's type in the twentieth century).
I'm also curious about whether types were digitized from actual impressions or the original drawings. When ink hits paper there is gain (i.e. ink spread) and ideally I'd like to know if that has been taken into account in digitizations. Any references would be greatly appreciated!
I see from previous forum posts that people think Centaur was digitized from drawings and thus looks weak but this means it would look fine printed letterpress. And I know from taking proofs of 72 pt monotype centaur, that at this size there really is no comparison; the metal type is so much more refined.