[pure-silver] Re: Stand developing

Streaks can come from too little agitation, and in that case, like to show
up around sprocket holes. Check the archives for previous discussions under
?bromide streaks¹. Richard Knoppow explained this several times in detail.
They are different from density increases around edges or sprocket holes,
which can be caused by too much, if not violent, agitation.

However, I thought this was standing development for one hour. Now, there is
talk about 5-6 s agitation every minute. Please explain the regime once
again in detail.





Regards



Ralph W. Lambrecht

http://www.darkroomagic.com












On 2005-08-24 21:45, "Danny Twang" <dannyt@xxxxxxxxxx> wrote:

> Hi Jeffery,
> 
> Hope I'm not the reason for Your ruined film:-O
> First of all, I think 30 min is to short, I gave mine one full hour, and it
> looks to be about perfect for my style. I know nothing about sprocket hole, I
> tried on 120 film. Streaks usually comes from wrong agitation. I used my
> normal agitation method, slowly inverse the thank upside down, turn the tank
> 180* horizontal, and back up. The whole process within 5-6 sec. than repeat
> during one minute.  
> 
> danny
> 
> 
>> Well, I gave it a shot - Rodinal 1:100 for 30 min. at about 72 deg. Strong
>> agitation for the first 30-40 sec., then let it sit.
>> 
>> Most of the frames turned out OK (if a bit thinner than expected), but a few
>> frames (with wide expanses of clear sky) showed sprocket-hole streaks. Not
>> pronounced, but enough to ruin the frame. Seemed inconsistant thru the roll.
>> 
>> Not sure what to think.
>> 
>> 
>> 
>>  
>>> Yesterday I was running a test through a Rolleiflex MX EVS I've been
>>> replacing the lens on, and thought I would test out stand developing since
>>> there was no important pictures on the film.
>>> 
>>> It was FP4 exposed at ISO125 in Rodinal 1:100 at 20*C for one hour, and they
>>> came out great! I don't have any darkroom at the moment, I've just bought a
>>> new house so everything has been packed down, but it looks like it will
>>> print great. It came out great on my scanner
>>> <http://tinyurl.com/8d9cx>http://tinyurl.com/8d9cx
>>> 
>>> I was wondering what other film/developer combo is suitable for stand, and
>>> what time and temp You are using....
>>> 
>>> thanks,
>>> danny
>>>  
>> 
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> 
>  
> 
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>  
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> 
>  
> 
> Danny Twang
>  
> 
> Aallsgate 15C
>  
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> N-3922 PORSGRUNN
>  
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> Norway
>  
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> 
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> danny@xxxxxxxx
>  
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> http://www.dannytwang.com
>  
>  
> 
>

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