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Re: [OM] Film scanning

Subject: Re: [OM] Film scanning
From: Ken Norton <ken@xxxxxxxxxxx>
Date: Mon, 25 Jun 2012 09:34:48 -0500
Just a cautionary note about using swiffer for cleaning film. Swiffers
can scratch the film. Unfortunately, these scratches are not visible
to the human eye and may not even cut through the emulsion itself. But
depending on whether it's a piece of embedded dirt or the cut ends of
the swiffer threads itself, it cuts a very thin angle cut into the
base. This creates a prism angle. When your scanner is a point-source
light, like the Nikon, the light gets deflected away from the sensor
and you'll get a line.

About the only "safe" thing to use on film is a bulb/hair brush.
Squeezing the bulb doesn't actually blow dust off of the negative,
what it does is create a brief static charge in the brush itself so
when you dust off the film, the cooties stick to the brush.

You can also "charge" a brush with a blast of compressed air. If you
blast the film with the compressed air, you end up statically charging
the film AND you risk warping the film. Blasting the brush will blow
off any previous cooties and will charge the hair.

-- 
Ken Norton
ken@xxxxxxxxxxx
http://www.zone-10.com
-- 
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