[pure-silver] Re: Light Leaks with Large Format

Cliff

You are mixing words like gasoline and lit candle. This makes me very
nervous. What are you doing with a lit candle near gasoline?





Regards



Ralph W. Lambrecht

http://www.darkroomagic.com







On 2005-11-30 11:44, "Clifford Brown" <cliffordbrown@xxxxxxxxxxxxxxxxxx>
wrote:

> This is a copy of a post I made to the list in December 2003.
> I have used it successfully for sealing small pinholes.
> Clifford.
> Somerset UK.
> 
> Copy.
> An old recipe for filling pinholes can be made from lampblack, rubber
> cement - the kind found in cycle repair outfits - mixed with petrol ( known
> to some people, I am told, as 'gas':-)  The amount of lampblack you will
> need for such a repair can be collected from a piece of glass held over a
> lighted candle.  The glass makes a useful mixing palette. The repair will
> dry flexible and *non* sticky. I promise!
> 
> First class new bellows are made to order by Camera Bellows, unit 3-5, St
> Paul's Road, Balsall Heath, Birmingham, B12 8NG, United Kingdom. Tel No.
> 0121 440 1695. Fax 0121 440 0972.
> 
> Clifford
> Somerset UK.
> 
> ----- Original Message -----
> From: "DarkroomMagic" <info@xxxxxxxxxxxxxxxx>
> To: "PureSilverNew" <pure-silver@xxxxxxxxxxxxx>
> Sent: Tuesday, November 29, 2005 4:38 PM
> Subject: [pure-silver] Re: Light Leaks with Large Format
> 
> 
>> Cor
>> 
>> These pinholes are really tiny. Light coming through them does not get
>> directly to the film as they are at the bottom of the folds. Incoming
>> light
>> will have to bounce off the inside of the bellows first to reach the film.
>> 
>> So we have lots of very low exposures, similar to a very small pinhole
>> camera apertures, and most of it absorbed by the inside of the bellow
>> walls.
>> The effect seems to be minimal.
>> 
>> I didn't even notice them until sticking a light bulb into the camera,
>> sealing it light-tight and investigating it in the darkroom. I suspect
>> that
>> many view cameras have this 'problem' and never causing an issue.
>> 
>> I just can't live with the thought.
>> 
>> 
>> 
>> 
>> 
>> Regards
>> 
>> 
>> 
>> Ralph W. Lambrecht
>> 
>> http://www.darkroomagic.com
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> On 2005-11-29 09:15, "Breukel, C. (HKG)" <C.Breukel@xxxxxxx> wrote:
>> 
>>> Ralph,
>>> 
>>> Another option I have tried is the black neoprene stuff they sell in
>>> diver
>>> shops, which they use to repair diver/wet-suits. I had limited succes
>>> with
>>> that though..I am realy surprised about your observation that these
>>> pinholes
>>> did not interfere with the actual exposure! Maybe I have been to hasty
>>> with
>>> replacing my Toyo Field 810M which was realy puuctered with a lot of
>>> pinholes..;-)..
>>> 
>>> Best,
>>> 
>>> Cor
>>> 
>>>> -----Original Message-----
>>>> From: pure-silver-bounce@xxxxxxxxxxxxx
>>>> [mailto:pure-silver-bounce@xxxxxxxxxxxxx]On Behalf Of DarkroomMagic
>>>> Sent: dinsdag 29 november 2005 0:25
>>>> To: PureSilverNew
>>>> Subject: [pure-silver] Re: Light Leaks with Large Format
>>>> 
>>>> 
>>>> Thanks for the tip Ole
>>>> 
>>>> I will order and try this stuff (to repair the bellows , of
>>>> course). It
>>>> sound very promising.
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> Regards
>>>> 
>>>> 
>>>> 
>>>> Ralph W. Lambrecht
>>>> 
>>>> http://www.darkroomagic.com
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> On 2005-11-28 22:09, "Ole Tjugen" <oftjugen@xxxxxxxxx> wrote:
>>>> 
>>>>> Ralph,
>>>>> 
>>>>> This stuff works:
>>>>> 
>>>> http://cgi.ebay.de/Fluessig-Latex-Wahlfarben-hoher-Latexanteil
>>>> -250-ml_W0QQitem
>>>>> Z8321186879QQcategoryZ45946QQcmdZViewItem
>>>>> 
>>>>> Disregarding the other possible uses of it, it can be
>>>> painted on in a very
>>>>> thin yet strong layer, and gives sufficient "density" to
>>>> reduce light
>>>>> leaks significantly. Follow dirctions in the pack to get it
>>>> non-sticky
>>>>> after drying, or your bellows will sick together into one
>>>> massive lump.
>>>>> 
>>>>> Don't ask me how I got the idea of trying this stuff for
>>>> bellows repair -
>>>>> please :)
>>>>> 
>>>>> Ole Tjugen
>>>>> 
>>>>> On Mon, 28 Nov 2005 19:59:57 +0100, DarkroomMagic
>>>> <info@xxxxxxxxxxxxxxxx>
>>>>> wrote:
>>>>> 
>>>>>> Howard
>>>>>> 
>>>>>> On second thought, I will attempt a repair, what the heck,
>>>> I have no use
>>>>>> for
>>>>>> these bellows if I have to buy a new one anyway.
>>>>>> 
>>>>>> I did some research on Elastoseal. There are many products
>>>> with that
>>>>>> name in
>>>>>> a variety of spellings (Elasto-Seal, Elastoseal etc), but
>>>> nothing in
>>>>>> Germany. I'll try some other rubber-like flexible
>>>> compound! Any ideas?
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> Regards
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> Ralph W. Lambrecht
>>>>>> 
>>>>>> http://www.darkroomagic.com
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> On 2005-11-28 18:29, "Howard Efner" <hfefner@xxxxxxxxxxxxx> wrote:
>>>>>> 
>>>>>>> Ralph, pinholes in the bellows can be a real problem!  The ideal
>>>>>>> solution is to replace the bellows, but a repair will
>>>> save some cash
>>>>>>> and extend the life of the bellows.  One way to take care of
>>>>>>> pinholes, and also to repair big holes etc, is to get some black
>>>>>>> rubber roofing primer ( Snow Roofing Systems Elastoseal -
>>>> Home Depot)
>>>>>>> and paint the inside of the bellows to seal the leaks.  Use a foam
>>>>>>> brush!  A conventional brush will develop little crumbs of rubber
>>>>>>> that will come off and stick to the cloth.  Let the
>>>> camera thoroughly
>>>>>>> dry with the bellows extended ( several days to a week or so
>>>>>>> depending on humidity) so that the bellows do not glue themselves
>>>>>>> together.  If still tacky, lightly dust with some talcum
>>>> powder and
>>>>>>> vacuum out the excess or give a thin coating of the black
>>>> rubber finish
>>>>>>> coat.
>>>>>>> 
>>>>>>> The Elastoseal is a water based neoprene emulsion that drys to a
>>>>>>> flexible rubber film.  Also good for waterproofing darkroom
>>>>>>> sinks.  They also make a white and black top coats that work in
>>>>>>> darkroom sinks.
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>> ==============================================================
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>>>>>> 
>>>>>> 
>>>>>> 
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>>>>>> 
>>>>>> 
>>>>> 
>>>>> 
>>>> 
>>>> 
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