Re: [APML] TP woes and questions

["Jim Janusz" <jjanusz@dc.rr.com>]

Hi Roland,

I came in late here, but I have another idea.  When I first used HC-110 I
mixed it wrong.  The instructions on the bottle are for mixing a stock
solution.  I now use 1 ounce of developer to 31 ounces of water to make a
direct working solution.

Just a thought as your results sound like this may be the problem.

Jim

----- Original Message ----- 
From: "Roland Roberts" <roland@astrofoto.org>
To: <astro-photo@seds.org>
Sent: Friday, October 03, 2003 10:44 PM
Subject: [APML] TP woes and questions


> -----BEGIN PGP SIGNED MESSAGE-----
>
> I have some TP I bought about 2-1/2 years ago, shortly before Lumicon
> went out of business.  My first attempt in March 2001 at using it came
> out with a black roll :-( My second attempt last winter came out with
> a black half-roll :-( My third attempt (just finished) came out with
> an almost black half-roll :-(
>
> The first black roll I thought was probably due to bad handling in a
> room that wasn't *quite* dark instead of a changing bad (which I
> subsequently purchased).  The second time that was definitely not the
> problem and I though I had just overexposed the shot---I took it from
> here in Brooklyn with the Lumicon H-alpha filter, but it was about
> 20--30 min @ f/4.  Both of those attempts were developed with D-19,
> 68°F, 7 min.  Tonight, I developed with HC-110 dil B, 68°F, 12 min.
> Looking at the film, I realized that both of the previous two times,
> *everything* had come out black, even the unexposed parts of the film.
> This time I can tell where the frames are.  I took shots at 1, 2, 3,
> 4, 6, and 8 min (then came the clouds).  But the rebate is *way* dark.
>
> So, did I just overdevelop the film, or did this roll have a problem?
> I'm thinking of pulling out another roll out and cutting a small piece
> to develop at shorter times just to see how dark the unexposed film
> gets.  Ideas?
>
> TIA,
>
> roland
> - -- 
>        PGP Key ID: 66 BC 3B CD
> Roland B. Roberts, PhD                             RL Enterprises
> roland@rlenter.com                            6818 Madeline Court
> roland@astrofoto.org                           Brooklyn, NY 11220
>
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