[alt-photo] Re: Development By Inspection Methods

[Francesco Fragomeni]

Thanks Ken,

I've found a few things written about Pinacryptol Yellow and Pinacryptol
Green that I had not previously seen. They echo your experience with the
desensitizer reducing the speed of the film significantly. I've also found
reports that it may not work or be effective with modern faster films. I
was hoping that these desensitizers would be more useful then they
apparently are and I suppose that explains why they are nearly impossible
to get a hold of these days. If there was anything magical about them
they'd probably be in use today.

I'm very interested in what I'll be able to do with the green safelight
technique (minus the desensitizer). I use 100 and 400 speed films. My only
concern is whether or not 400 ISO film will be dramatically more apt to fog
using the technique. I understand that the green safelight is only on for a
few seconds at a time and kept at a safe distance and I get that the film
desensitizes as it develops but I' still concerned that faster film will
fog. Anyone have any experience developing 400 ISO film this way? Are there
any problems with it?

-Francesco


On Wed, Mar 7, 2012 at 7:58 PM, Ken Sinclair <photo1 at telusplanet.net> wrote:

>
> On 7-Mar-12, at 6:12 PM, Francesco Fragomeni wrote:
>
>  Hi all,
>>
>> [snip)
>>
>> Anyway, I am very curious about other DBI methods but I've been unable to
>> find much information on the web and in the forums. I know that there are
>> still some people who DBI using a dark green Wratten safelight.
>>
>>
> [snip]
>
> Francesco,
>
> I 'got into' trying DBI about 35 years ago using Pinakryptol Green
> pre-development bath
> with occasional 'second half of development time' of observation with
> green safelight
> during tray development....  a practice recommended by a friend
>
> I (personally) was not convinced that it was worth the trouble.. the $
> cost... and gave it up
> up after finding that 'my film speed' of the film was reduced by just over
> half.
>
> But...  since then, I have on a few but rare occasions used short
> green-safelight inspection
> of film observing the back of the film (without any Pinakryptol
> pre-development soaking)
> but again... only after at least half development time has passed.
>
> By the same token... I have not tried Pinakryptol yellow.
>
> Ken
>
>
>
>
>
>
> Quando omni flunkus moritati (R. Green)
>
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