Graham Sutherland / Polynomial on Nostr: npub1hvdfn…69sq9 rubylith was also the masking film they used for the silicon ...
npub1hvdfn5ne7zvks3ztfewr00vdjv3kve4nddht43p8fjepc8rn6yasz69sq9 (npub1hvd…9sq9) rubylith was also the masking film they used for the silicon lithography processes in very early Intel processors!