Well, I investigated the idea that I thought would allow me to print them faster – doesn’t work sadly 😛
The idea was sensitizing the solution with methylene blue dye – Only I think I may have used a bit much as it pooled quite drastically, and frankly it cut the sensitivity away to nearly nothing, so I may be on to something with the idea of spectral sensitizing, just I have it backwards or something. *shrug*
That’s my pouring bench, my uber high tech coating method is to put about 1/6th tsp of solution in a spoon and then dump it in the middle of a clean plate… Like so (after 30 sec or so of spreading out).
I was double coating those in the hope it would make a difference – it didn’t. With a clean glass plate the solution will spread itself out by capillary action or something – over a minute or two it basically covers the plate on it’s own – this makes for a slightly thicker coat at the center, but unless you’re dopey enough to add dye to it it shouldn’t matter.
Some coated plates;
I guess it eliminates a variable – Yay me!
This is the closest that i got to a print;
It’s from a negative, so is negative, and it’s on black perspex – a substrate which, excitingly enough, I have discovered does not work at all well with this process (it coats very unevenly) – though it is good for backing coated glass plates – In the following I’ve bumped the levels and suchlike a bit.
I can make stuff out cos I know what the neg was – a view from my atillier window amusingly enough – there’s a square white sign in the foreground, some stairs about 1/3rd of the way up towards the right – and at the same level on the left a rounded window on the building facing me – very bloody hard to photograph.
So for now, I’ll go back to 1 & 2% solutions of rosin in ethyl alcohol on chemically cleaned glass plates, cos I’m reasonably sure that works.