It's something that makes more sense hands-on. I took a basic letterpress printing workshop[1] at the SF Center for the Book (SFCB[2], a non-profit in SF), so I had an immediate idea of not just what brass rules were and even how they felt in my hands. Making a portrait with them would be a pretty involved, very tactile experience.

There's so much tacit knowledge involved with physical skills and practices that the only way to preserve the knowledge is to keep using and teaching the techniques. For letterpress printing this is going to be the domain of specialized artists and non-profit organizations like SFCB. I really hope that we do manage to keep practices like through the generations; they're unique and beautiful as both a matter of history and a matter of craft.

This is a good reminder to myself that I meant to take the extended "core" letterpress workshop series at the SFCB, but did not have the time or energy for it over the last couple of years. Hopefully I'll do it this fall or something...

[1]: Like this but, IIRC, with a different instructor: https://www.sfcb.org/workshops/calendar/introductiontoletter...

[2]: https://www.sfcb.org/

Brass rule appears to be... exactly what it sounds like, a straight line made notionally of brass. This isn't exactly an unknown term; compare the <hr> tag.