Re: Coating Box for Becquerel Development

[Bruce McCaughey <steelbar@shaw.ca>]

Hi All
> Actually, varnish never really cures fully.  I'd think of shellac  
> before
> varnish for this application.  Or epoxy paint.
> Best regards,
> etienne
Thank you for your response. I will probably go with the shellac and  
I should have some of that on hand.

> Bruce - the varnish probably doesn't matter. The iodine should be  
> in a glass
> dish inside the box, and capped by a sliding piece of glass that is  
> slid out
> when you want to expose the plate to the iodine fumes.
>
> gregory
Oh shoot, The sliding glass is a great idea but it's probably too  
late for this box. We are using "Coming into Focus" with Gerard  
Meegan's chapter and he's a bit vague about the fuming box. I have  
been mostly making up the design so there are some definite errors. I  
will have to do a few modifications to improve the sealing of the  
box, it seems that the best result should have no iodine leakage.

> Rob wrote:
> > I agree with Greg that the varnish will probably have little or no
> > effect on the powerful iodine fumes in your box.  Varnish takes a  
> > while
> > to fully dry/cure, even though it may feel dry to the touch.
> > Consequently, you should wait several days (a week would be even  
> > better)
> > before putting the air-tight glass top on your fuming box.
Hi Rob
"air-tight glass top" do you have a drawing or a photo of your box. I  
don't have a air-tight glass top,should I?

Thanks again for all your help here is a link to a photo of my fume box.
http://members.shaw.ca/steelbar/FumeBox.jpg
Cheers
Bruce