Re: Exacto Blade Not Clearing?
I've had VDB fog on my when dried with a hair dryer, so heat is a possibility. Although I'm not sure that UV light bulbs would generate enough heat to cause a whole lot of (noticible) fog... Camden Hardy camden[at]hardyphotography[dot]net http://www.hardyphotography.net On Thu, October 26, 2006 6:31 pm, Michael Koch-Schulte wrote: > Nope. Didn't happen without the UV light turned on. I'm thinking the steel > got hot enough to cause some reaction on the paper. Hmm. > > ~m > ----- Original Message ----- > From: Ryuji Suzuki > To: alt-photo-process-l@usask.ca > Sent: Thursday, October 26, 2006 3:28 PM > Subject: Re: Exacto Blade Not Clearing? > > > If there's anything that would be the chemical reaction between the > blade and sensitizer, or multiple light scattering under the blade. > > If you do "sham exposure" that is to place the blade on sensitized paper > for 8 minutes WITHOUT any exposure and then process, you'll know. > > > > On Thu, 26 Oct 2006 15:09:13 -0500, "Michael Koch-Schulte" > <mkochsch@shaw.ca> said: > > I set up what I thought might be a test of how well my prints were > > clearing > > I included an opaque object at the edge of a test print -- an exacto > > blade > > to be more precise. Strangely, the dense parts of my stepwedge cleared > > fine > > but the exacto blade left a fair amount of stain behind -- like a 5 > per > > cent > > grey. So the question is, why? This was a VDB print shot for 8 minutes > on > > flourescent tubes. Like I said the dense areas of my stepwedge are > paper > > white. Does metal pick up and emit UV from within? Second question, > > what's > > the best method for determining if a VDB has been cleared properly? > Thx. > > > > ~m > > >
|