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Re: filmscanners: Dust in Sprintscan 4000?



< and compressed air from a rather healthy air compressor (not damaging neg,
however), >

What PSI are you using as your threshold?

----- Original Message -----
From: "jimhayes" <jimhayes@jymis.com>
To: <filmscanners@halftone.co.uk>
Sent: Wednesday, September 19, 2001 7:48 AM
Subject: Re: filmscanners: Dust in Sprintscan 4000?


>
>
>
>
> > On Sat, 15 Sep 2001 08:41:04 -0400  Barbara & Martin Greene
> > (martbarb@earthlink.net) wrote:
> >
> >
> >
> > > I'd
> > > appreciate if users of the Sprintscan would tell me just how much
stuff
> > > shows up in their slide scans.
>
> In my SS 4000 35 mm frames, which are mainly Tmax 100, I did a rough count
> once. I chose moderately (one stop) underexposed negs or night shots, so
white
> dust specks/hairs would show up. I scanned with Vuescan at 16 bit straight
> through to photoshop and enlarged to 100% and went around the frame and
counted
> dust specks. I live in a semi-arid area and humidity ranges from 20-50%RH.
I
> store the negs in mylar sleeves, thumb cut from the side from "Light
> Impressions" (and stored in their folder/ box system) to avoid insertion
> scratches. I shoot each neg with an anti-static gun, and compressed air
from a
> rather healthy air compressor (not damaging neg, however), and I wear high
> quality cotton gloves. Then I examine negative at an angle under good
lighting-
> and I almost never see any dust remaining on neg (keep reading tho). I
keep an
> air cleaner (HEPA) in the room 24/7, overated for the size of room, and I
keep
> the door closed with a seal on the bottom, and all windows closed, except
a
> permanently window mounted air conditioner. Yada, yada...
>
> The count varies from 200-1000 spots per frame. I think a lot is due to
dry
> climate and the increased resolution of scanner, or maybe I should
circulate
> the air more than I do. The highest numbers come from a processing lab in
Utah
> (dip and dunk). The lowest numbers come from rolls I have processed myself
(I
> used a 2 micron water filter at one point) or even better, a little outfit
in
> New Mexico which actually still does roll tank processing, with fresh
> solutions, etc, specializing in B&W only. Since I am VERY low volume, I
don't
> mind spotting away for two hours or more, as long as I can get up every
half
> hour to take a quick screaming break.
>
> Hopes that helps.
>
> --
> Jim Hayes
>
> Digital Surrealism
> Images at http://www.jymis.com/~jimhayes
>
>




 




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