pentaxuser
Member
Thanks for the reply, koraks. All I can say is that the DUKA didn't fog paper used at the right angle, right intensity and distance from the paper. It would appear that your LED operating at 600nm is at a slightly different wavelength from the DUKA which as I understand it is 598nm
I cannot say that 2nm makes any difference as I don't know enough about the science of wavelengths to do so . All I can say is that I never noticed any problem with fogging.
I do wonder how DUKA managed to sell its light if the fogging problem was as inevitable and obvious as your experience with an LED at 600nm suggests
DUKAs were never cheap and I presume that DUKA carried out tests on its sodium lamp but that's a presumption on my part
Crohnsie seems to have bought a DUKA but then thought better of it and has not used it as he cannot quite reconcile its use with colour paper
What he bases this on I don't know but if I had an unused DUKA and had struggled with cutting paper in the total darkness, I'd be tempted to try it before leaving an expensive purchase languishing in a box
If you had the same Durst light as I did then I agree it was as good as useless. I used the deep green filter that was for colour paper prints and after a full 15 mins I still couldn't see my hand waving in front of my face
It's pity that we have so few DUKA users here whose experience would be helpful. The problem as always is that with few actual users and a general feeling that RA4 = total darkness we will always tend to suggest that total darkness is the only way to process colour paper
pentaxuser
I cannot say that 2nm makes any difference as I don't know enough about the science of wavelengths to do so . All I can say is that I never noticed any problem with fogging.
I do wonder how DUKA managed to sell its light if the fogging problem was as inevitable and obvious as your experience with an LED at 600nm suggests
DUKAs were never cheap and I presume that DUKA carried out tests on its sodium lamp but that's a presumption on my part
Crohnsie seems to have bought a DUKA but then thought better of it and has not used it as he cannot quite reconcile its use with colour paper
What he bases this on I don't know but if I had an unused DUKA and had struggled with cutting paper in the total darkness, I'd be tempted to try it before leaving an expensive purchase languishing in a box
If you had the same Durst light as I did then I agree it was as good as useless. I used the deep green filter that was for colour paper prints and after a full 15 mins I still couldn't see my hand waving in front of my face
It's pity that we have so few DUKA users here whose experience would be helpful. The problem as always is that with few actual users and a general feeling that RA4 = total darkness we will always tend to suggest that total darkness is the only way to process colour paper
pentaxuser