[pure-silver] Re: Now this realy an Off Topic question..
- From: Jean-David Beyer <jeandavid8@xxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Thu, 26 Nov 2009 06:28:30 -0500
C.Breukel@xxxxxxx wrote:
I have this really off topic question, there is a faint connection to
pure silver though..;-)..
Since a year or so I am quite heavy into wet plate collodion
photography, I'll spare you the details, but basically you prepare and
process a light sensitive plate with silver halides (see pure
silver..;-)..) in the field.
After exposure plates have to be developed immediately, so you need a
what is called a darkbox. Since the emulsion is only sensitive to blue
and a bit of green light you can work under red light. I am building
this box in my car.
Now my question is: how long can you run a low wattage (red) bulb from
your car battery before you drain said battery and are unable to start
the car again?
If you use some red LEDs, enough so you can see what you are doing, I
imagine whatever power source you use will last longer than if you use
an incandescent bulb.
--
.~. Jean-David Beyer Registered Linux User 85642.
/V\ PGP-Key: 9A2FC99A Registered Machine 241939.
/( )\ Shrewsbury, New Jersey http://counter.li.org
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