Opportunity is missed by most people because it is dressed in overalls and looks like work. - Thomas Edison
As I understand it:Dual Cures get little to no benefit from sitting in the sun/post exposure. Something about how the molecules position themselves. I think it was a Saati article? Or maybe Al posted some of his great wisdom about it....It's the emulsions like Murakami's Aquasol and Saati's PHU that do benefit from post exposure. The SBQ's if I remember right. Someone please correct me if I am wrong.If the bulbs are not emitting light in the correct frequencies for a dual cure, then the screen is doomed from the beginning.Even using a chemical hardener will not give you the life expectancy (and detail) you desire.Sorry to say Alan, yep you need a better light source.
I'm not 100% convinced that the starlight puts out the optimum light for these emulsions either.Diazo is 360nmSBQ is 405nmStarlight is 385nm
I'll correct my correction. I wondered if the addition of Diazo for hardening a Photopolymer emulsion, reduced the effect of post exposure, and was told by Murakami, no.I, perhaps incorrectly, carried this over to dual cures.
Yep its time to get that thing out of there the Richmond solarbeam you have is an excellent exposure unit. Fix it up and get back to work, and sanity.
we use CCI HXT with 1/2 bottle of diazo added - don't need a whole bottle, shot with a starlight, DTS - our screens are bullet proof too...we do DC/WB every single day, not one single issue. Thanks to Mike for the heads up on the HXT, been over a year now, can't find anything better.Al, man, you gotta move on from this issue. You suspected a faulty expo for a while now, time to make a move. see my tag line
Quote from: Frog on October 30, 2015, 02:02:29 PMI'll correct my correction. I wondered if the addition of Diazo for hardening a Photopolymer emulsion, reduced the effect of post exposure, and was told by Murakami, no.I, perhaps incorrectly, carried this over to dual cures.Isn't adding diazo to a photopolymer the definition of a dual cure?
For comparison, we are now using an entry level SAATI LED unit at 50 second exposure time. Aquasol HV is giving us about 100-200 discharge prints straight out of bucket. If we put it out in the sun, we are getting 500+, even up to 1,000. We are also testing the SAATI PHU and are getting about twice as much on the discharge runs. All of these are without hardener.pierre