Not the answer to your original question but I just wanted to add a couple of hints about Masa anyway:
- If you be gentle to the paper during application of the emulsion, (using fine sable-hair wash brushes gently or a glass rod perhaps?) you won't get much napping (raised fibers) afterwards. In any case, Masa is a mixed fiber paper, therefore you'll always get some swirl patterns (differential reflection and/or some texture due different absorption characteristics of different fibers...) with it - but you have to look pretty closely / in a nitpicking manner to notice that. (Small 5x7" prints may exaggerate the effect of course...)
- IME, Masa gives the best visual dmax (compared to Weston and COT320) with many iron / iron-silver processes. Since it's a quite thin paper, you have to view it by placing a bright white background behind it. (I use Yupo for that purpose...) This, combined with the brightness of the paper itself, results with great depth and a very good visual dmax.
Originally Posted by jakobb