"I strain, you strain, we all strain for eyestrain"
Bret Buckman
U. C. Berkeley Art Dept. Printmaking Technician
buckman@uclink2.berkeley.edu
On Fri, 15 Sep 1995, J. Wayde Allen 303-497-5871 wrote:
> On Thu, 14 Sep 1995, Christopher Walton Reid wrote:
>
> >
> >
> > On Thu, 14 Sep 1995, David Black wrote:
> >
> > > I am looking for a good source for a carbon arc lamp or any other good and
> > > inexpensive light source for kallitypes. Any ideas will be greatly appreciated
> > > Thanks in advance.
> > >
> > > David Black <ZU03632@UABDPO.DPO.UAB.EDU>
> > >
> > David,
> >
> > I could be wrong about this, but I remember talking to a guy who had a
> > carbon arc lamp for a copy camera (the type used to make half-tone, PMTs,
> > etc) and he told me that carbon arc lamps had been made illegal some
> > years ago. It had something to do with gases given off by the rods I
> > think.
>
> I can't say that I have actually seen or used a carbon arc lamp, but I
> have experimented briefly with carbon arcs used in welding (You can use
> the arc to heat/melt metal.). If they don't make carbon arc lamps
> anymore and you really want one you should be able to build one fairly
> easily. You could probably check at the local welding supply store for power
> supplies and carbon rods, build a box to put the thing in and protect you
> and everything else from the arc, turn it on and strike the arc. It would
> probably be easier to try something like a mercury vapor lamp first though.
>
> I'm not too sure about the gasses given off by the arc, but you probably get
> carbon dioxide, carbon monoxide, and ozone. I would guess that any other
> gasses would come from impurities in the rod or any coatings (like
> copper) that help with striking the arc.
>
> Don't know if this helps you much.
>
> - Wayde
> (allen@boulder.nist.gov)
>