BILL F BROOKS wrote:
>
> Hi All, Shawn/Janis,
>
> Well, I think I'm going to take the plunge and start rolling and washing
> my own BW stuff...showed the better half the math and by X-Mas will have
> a bulk loader and some Ilford HP-5 >;) better yet will have a Beseler
> tank and some Diafine to get a hold of those rolls I insist on pushing
> >;)>;)
>
> I won't have an enlarger for some time and am wondering what kind of
> light source would be suitable for making proof sheets(contact sheets)?
> I can rig up something out of glass and wood that will hold the film
> against the paper, but don't know what kind of light/time needs to be
> applied to the emulsion sandwich to make it work. Any help of any sort
> will be appreciated.
>
> TIA
>
> Bill >; )
> "Life unfolds on a great sheet called Time (film)*,
> and once finished (developed)* is gone(here)* forever..."
>
> *provided you have a good archival system in place...
>
Hello Bill,
Welcome to the wonders of the darkroom.
The light source for contact prints is not critical, as
long as the light is even across the paper. A "point"
light, such as a small halogen lamp, will give marginally
better sharpness than larger light sources.
A normal lightbulb suspended about 1 meter (3 feet) above
the contact frame should work fine. If in doubt, increase
the distance to get more even light. Exposure is found
by making test strips and trial and error. A reasonable
starting point would be approx 20 seconds using a 40W
lightbulb.
This is a bit vague, but exposure depends very much on
the specific conditions. FWIW, Ilford rates the
sensitivity of their Multigrade IV paper as 500 ISO when
exposed without grading filters. Smart use of a light
meter might give fairly precice starting point.
Regards
Lars
--
Lars Haven <mailto:lhaven@xxxxxxxxxxxx> http://isa.dknet.dk/~lhaven
"When writing about women, one must dip one's pen in a rainbow"
D. Diderot
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|