Re: UV exposure unit and sunlight vs. artificial light

[Mark Nelson <ender100@aol.com>]

Francis,

The Amergraph is a great option. You can also get an option for  
contact printing gelatin silver. If it is too pricey there are other  
options.

I would certainly want something with a vacuum frame.

For info, check out Sandy King's aetcle on Ed Buffalo's Unblinking Eye  
web site or his chapter in Dick Arentz's second edition of The  
Platinum & Palladium Print.

Mark Nelson

www.PrecisionDigitalNegatives.com, PDNPrint Forum @ Yahoo Groups, www.MarkINelsonPhoto.com

On Dec 14, 2008, at 1:10 PM, francis schanberger <frangst@gmail.com>  
wrote:

> I have been charged with acquiring a new UV exposure unit for my  
> school because of an impending move early summer. basically the  
> university where I teach is moving us from an old but fully  
> functional building, where we have ground floor studios and  
> classrooms to a 4th floor location. Because its a multiuse building  
> and we can't use the stairs without tripping a fire alarm, alt  
> process exposures will be more easily done inside. Basically the  
> students and faculty will be using two elevators to get in and out  
> of the building.
>
> The only exposure units I have used have been the black light tubes  
> (BBL?) and a NuArc 261K.
>
> Judy, was this addressed in Post Factory? I may have misplace one  
> issue.
>
> Any suggestions for a starting point?
>
> Is there a discussion in the archives of the differences in prints  
> caused by printing with different sources of UV? Putting repeatable  
> time issues aside, does anyone favor artificial light like the NuArc  
> over sunlight or sunlight over the black light tube boxes? Why?
>
> What processes and light sources work well together?
>
> -francis