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  #11  
Old June 13th 04, 06:08 AM
PATRICK GAINER
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Donald Qualls wrote:

Chris Loffredo wrote:

Thanks for the various comments.

It is not a problem with the camera(s).

Before I start using distilled water for everything (or risk more film
experimenting), could it be the that I used the wetting agent in too
high a concentration (didn't have any accurate measuring vessels on the
order of 1cc)?


Not very likely that tiny spots are from wetting agent -- I've seen that
spot, but the spots are typically 2-3 mm across with more density at the
edge than the center, like what you'd see if soapy water dries on a
mirror (soapy water is exactly what the wetting agent treated wash is,
of course). Tiny spots like you describe could come from dust that got
on the film while drying (though that's more likely to come as tiny
threads in most locations), dust in the enlarger or scanner, very
localized increased development (can happen if you mix your developer
and didn't get the alkali fully dissolved; remaining crystals of alkali
will accelerate development locally whereever they come to rest by
raising pH), or even a film defect (junk in the emulsion from the
factory). If they print white, however, you can rule out pinholes, air
bubbles in the developer causing local underdevelopment, and dust in the
camera at exposure.

--
I may be a scwewy wabbit, but I'm not going to Alcatwaz!
-- E. J. Fudd, 1954

Donald Qualls, aka The Silent Observer
Lathe Building Pages http://silent1.home.netcom.com/HomebuiltLathe.htm
Speedway 7x12 Lathe Pages http://silent1.home.netcom.com/my7x12.htm

Opinions expressed are my own -- take them for what they're worth
and don't expect them to be perfect.


I'm not so sure about pinholes always printing black. Fine scratches print as
black if they are on the film side. Perhaps looking at the negative through a
microscope would give a clue. Even the 30 power pocket microscopes sold by
Edmund and Radio Shack are helpful. Get one that is self illuminating when
used with reflected light. Things on transparencies look different under
reflected light, so you may be able to see whether the pinpoints are in the
emulsion or in the film.


 




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