Paul Ron wrote:
"Uneven illumination? Were you using a diffuser or the condenors or both? You have to use the white plastic diffusers to replace the condenors otherwise you will get uneven illumination."
The diffusion disc is integral in the use of cold light heads, and of course it was utilized in my own printing. If you are still using a cold light head, I suggest you try the test which I mentioned above. If you are satisfied with the results, no problem then. I can only comment from my own personal experience in using cold light heads. That is to say, not good.