Re: [APML] Tech Pan developing

[gbuckles@widefieldastrophotography.com]

Thanks Jim. I was considering the Jobo process and your experience fits in
with what I had read elsewhere.

Nothing like going "old school" when it seems like everyone is going
digital. At least all the needed equipment is going cheap now! I just love
the big negatives and transparencies.

Garth





> Hi Garth,
>
> Yes, that is what I used for the 4x5 sheets.  I did not use trays, I
> followed Brad Wallace's advice and used a Jobo Processor or at least a
> Jobo
> 4x5 tank and a roller table.  4x5 is very susceptible to uneven developing
> and the Jobo rotary process does the best job.  It also keeps the
> temperature even throughout the process.
>
> I did try a dip tank and did not like the results so I quickly went Jobo.
>
> Clear Skies
>
> Jim
>
>
> ----- Original Message -----
> From: <gbuckles@widefieldastrophotography.com>
> To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
> Sent: Tuesday, May 03, 2005 2:48 PM
> Subject: Re: [APML] Tech Pan developing
>
>
>> Jim,
>>
>> Is that the HC-110 formula and time you use for 4X5 sheets? And do you
>> use
>> trays to develop your 4x5 Tech Pan?
>>
>> Any insights would definitely be appreciated.
>>
>> Garth
>>
>>
>>
>>
>>
>>
>>
>>
>>> Hi Jason and Scott,
>>>
>>> If you want to mix HC-110 in small batches here are my measurements
>>> which
>>> have worked well for me.
>>>
>>>  If you mix HC-110 in small batches mix 1 oz of developer to 31 ozs of
>>> water
>>> to make 32 ozs of developer. Or, to make 650 ml mix 20 ml of dev. and
>>> 630
>>> ml
>>> of water.  Be careful with the instructions on the HC as it's to make a
>>> stock solution not a working solution.  Sock solutions are meant to be
>>> diluted with water before use.  My system makes developer ready to use.
>>> You
>>> can use the proportions to make different amounts.
>>>
>>> I normally use 10 minutes but it really depends on the hyper fog on
>>> your
>>> film.
>>>
>>> Jim
>>>
>>>
>>>
>>> ----- Original Message -----
>>> From: "Lane, Jason R" <jason.lane@navy.mil>
>>> To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
>>> Sent: Tuesday, May 03, 2005 11:13 AM
>>> Subject: RE: [APML] Tech Pan developing
>>>
>>>
>>> Hi Scott,
>>>
>>> I just bought some HC110 to try as well, and the guy at OPT figured I
>>> ought
>>> to start with dilution B and a development time between 8-12 minutes
>>> and
>>> experiment from there.
>>>
>>> http://www.kodak.com/global/en/professional/support/techPubs/p255/p255.jhtml#13
>>>
>>> Hope this helps,
>>> Jason
>>>
>>> -----Original Message-----
>>> From: astro-photo-bounces@seds.org
>>> [mailto:astro-photo-bounces@seds.org]On Behalf Of Scott Hammonds
>>> Sent: Tuesday, May 03, 2005 8:54 AM
>>> To: 'Discussion of Film Astrophotography'
>>> Subject: [APML] Tech Pan developing
>>>
>>>
>>> If someone on the list is using or has used HC110 developer for Tech
>>> Pan
>>> could you please tell me what working solution you are using and time
>>> for
>>> developing. I am currently using D19 and want to try HC110
>>>
>>> Thanks,
>>> Scott Hammonds
>>> www.creatorsview.com
>>>
>>>
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>>
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