Re: New UV lightbox

[eric nelson <emanphoto@gmail.com>]

I looked at Nadaeu's book again and he lists sheet metal in the list of parts.  Mine is between the clips and ballasts and the board.  I just bought the parts and a friend assembled it for me so I don't know what function it serves other than it works.  Maybe for grounding?  Hell I dunno electricity, I'd just hurt myself.

On Mon, Feb 9, 2009 at 5:43 PM, Michael Koch-Schulte <mkochsch@shaw.ca> wrote:

I don't think so. Putting aluminum sheeting behind the lights "might" give you a little more power because of higher reflectance. I never, and my cyano exposures are between 4 and 10 minutes depending on what I'm mixing up. Not sure why you would put sheeting between the ballast and the wood though if a serious fault occurred it would burn through the aluminum pretty quick anyway. You really pray the ground wire works if something like that happens. My ballasts came with a ground wire which were all tied together during assembly.
~m

Ken Sinclair wrote:

Hi all....

Becoming more than frustrated with s-l-o-w exposures (2 to 3 hours for Cyanotypes)
in winter sunlight for exposing my alt work, I finally decided to bite the bullet and
go for physical comfort and consistency (bypassing the trips out to the sunlit deck
when the temperature is well below freezing)  and build myself a UV light box.

I have now taken possession of my set of new 20" BL tubes and ballasts. A few years ago,
there was some discussion about "grounding" the ballasts. I am wondering if something
like a thin aluminum (~ 1/32" thick) 'sheet' between the ballasts and the ¾" plywood sheet
that support the BL tubes' 'tombstones' on the underside. Would there be any safety  'benefit' in
attaching a similar sheet of aluminum between the tubes and the ¾ " plywood?

Ken

Quando omni flunkus moritati (R. Green)