[pure-silver] Re: Now this realy an Off Topic question..
- From: <C.Breukel@xxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Thu, 26 Nov 2009 16:10:59 +0100
Seems people are not bored yet on this topic, great..;-)..
I indeed do not drive a Caddilac, it is a modest Renault Kangoo
I now Bill his work, but didn't know he had an awesome trailer, wow..
I'll opt for a torch or bike light. I do have a "knijpkat" do not know
how it is called in English (http://nl.wikipedia.org/wiki/Knijpkat) it
is a light that charges itself by pressing it, but it has a cold blue
light, and when filtered with ruby lith there is not much light left..no
surprise, but I kinda like the idea that no battery is needed..
Best,
Cor
-----Original Message-----
From: pure-silver-bounce@xxxxxxxxxxxxx
[mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of Nicholas O.
Lindan
Sent: donderdag 26 november 2009 15:59
To: pure-silver@xxxxxxxxxxxxx
Subject: [pure-silver] Re: Now this realy an Off Topic question..
Many hours.
If you use a 12W lightbulb that draws 1 A then a 220 A-Hour
battery would power the bulb for 22 hours before you used 10%
of it's capacity.
But, likely as not, in the Netherlands you aren't driving
a full-size Cadillac with a huge battery. The smallest
battery, as for a small Fiat, is 40 A-hour, so 10% of the
capacity would be 4 hours with the lamp on.
If you use LED's the time will be in the days.
Shouldn't be any problem at all.
Bill Schwab uses regular, small red 'marker lamps' meant
for farm implements in his wet-plate-processing trailer.
At the bottom of the page:
http://www.apug.org/forums/forum43/10966-darkroom-portraits-60.html
Nicholas O. Lindan
Cleveland Engineering Design, LLC
Cleveland, Ohio 44121
----- Original Message -----
From: <C.Breukel@xxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Thursday, November 26, 2009 4:11 AM
Subject: [pure-silver] Now this realy an Off Topic question..
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?
Thanks,
Best,
Cor
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