asphaltum, a component of traditional black 'japanning' is known to fluoresce
https://www.reddit.com/r/typewriters/comments/1ncuci4/the_1920_lc_smith_no_8_glows_why_does_it/
asphaltum, a component of traditional black 'japanning' is known to fluoresce
https://www.reddit.com/r/typewriters/comments/1ncuci4/the_1920_lc_smith_no_8_glows_why_does_it/