I recently came across a phenomena I have never seen before: I processed HP5+ in Xtol 1:1 and irregular shaped spots appeared on the dried negatives. Diameter ~2mm, sometimes none, sometimes 3 per frame (sorry it's 120, nevertheless I hope on feedback please).
When looking through the negative you can not see them, but if you print (say the spot is in the sky) they print darker, which is odd, you expect a higher density with a spot, not lowering density.
After printing I looked carefully at an angle, and saw these blue/green coloured small stains/spot (again looking through you cannot see them). Spots were both on the emulsion and non-emulsion side. (afterthought: might the colour be responsible for the lower density ? Perhaps I should try printing on fixed grade paper ?)
Their appearance made me think of dichroic fog. I did try pure fixer on one of them, but that did not remove it.
I might try Farmer bleach, but that I can only apply to the non emulsion side (if it works at all).
The only reason for this phenomena is the Xtol I used: I always have to filter it before use, all my bottles of Xtol show a precipitate (although I used distilled water to make it up), and I always filter the working solution through a coffee filter; thus-far it never gave a problem.
The rest of my chemistry/procedure is sound, judged by a recent roll in home made Xtol (Mytol), the rest fixer etc are the same as the HP5 roll.
Any help appreciated,
Best,
Cor
Bookmarks