Neither one - I'm using 35mm TMZ mechanically enlarged to 7x10", which gives me quite some grain.
Originally Posted by Andrew O'Neill
@Evan: I haven't felt the need to standardize development yet. Until I have to pull an edition, I can just lift the print and see what it looks like. My temperature goes over 40C sometimes, which might be destroying the thinner layers of gelatin.
Also, I noticed visible differences between supports treated differently (more or less sizing, one or two coats, more or less formalin). Hot-dog rolling leaves a relatively rough texture, which I am concerned might create micro-bubbles or weaker points during mating. So even if up to 10% concentration is suggested for gelatin, I prefer two coatings of 4% and roll until the gelatin starts to set and yields a finer texture.