On a slightly unrelated subject (tangential to the "triple-weight") - does anyone make single-weight FB paper anymore? Back in the beginning, paper was a lot thinner than today - most albumen prints were made on paper no thicker than modern copy paper.
when I started with darkroom work I used AGFA Brovira in single weight only. Now it seems all makers want to sell cardboard, which is a lot more difficult to get flat! I want an emulsion like Forte polywarmtone - or Fortezo Museum - but on half-weight paper!