Re: [APML] Medium Format TP...worth messing with?

["Steve Walters" <s-walters@comcast.net>]

For a while, everyone was putting TP on reels for hypering to avoid this.
But Kodak changed the formulation some years ago and this is not necessary.
I found that hypering 120 TP worked fine as long as you do not remove the
paper before hypering. If you do that, areas of the film will not be hypered
evenly. I have a vacuum back on my camera so I first hyper, then remove the
paper.

Steve...
http://www.StarryNights.us

----- Original Message ----- 
From: "Bobby Middleton" <bobm@koyote.com>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Thursday, March 25, 2004 1:10 PM
Subject: Re: [APML] Medium Format TP...worth messing with?


> The bleedthrough was a problem for the last few rolls I had hypered which
> was over a year ago. I have not gotten back to any hypered 120 TP since,
> but someone mentioned it not long ago on APML I believe.
> This was a problem and a hot topic on APML 4-5 years ago. Kodak had the
> problem IIRC because of a dye (was it paper?) change. Kodak fixed the
> problem  with a reformulation and everything was OK for 2-3 years. But
when
> this appeared about 1 year ago I did some checking with Kodak. They
claimed
> no changes but I was skeptical.
> I was able to salvage the shots with use of the clone tool in Photoshop
but
> that's a poor solution.
> You might check this set of older APML archives:
> http://astro.umsystem.edu/apml/
> Search for TP bleed through
>
> Here's an image of M45 that shows the problem:
> http://www.koyote.com/users/bobm/TPbleedthrough.htm
>
> Bobby Middleton
>
>
>
>
>
> ----- Original Message ----- 
> From: "Mike Connors" <micon@starband.net>
> To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
> Sent: Thursday, March 25, 2004 8:50 AM
> Subject: [APML] Medium Format TP...worth messing with?
>
>
> > Hi All,
> >
> > Just wondering if anybody out there is still using
> > medium format TP?  IIRC there were some problems
> > with bleedthrough and flatness.
> >
> > If anyone is still using this product successfully, I would
> > be pleased to hear from you.  Although recipes are most
> > likely rampant in the Archives, any suggestions, tips, tricks,
> > and voodoo are welcome <g>.  Contact me off-list if desired.
> >
> > Thanks in advance,
> >
> > Mike Connors
> > _______________________________________________
> > Astro-Photo mailing list
> > Astro-Photo@seds.org
> > http://seds.org/mailman/listinfo/astro-photo
> >
>
>
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