Terry, A couple of things. Mason's post about deleting off-topic post probably have some relation to me. I received an e-mail from him stating that he considered my response to be some sort of personal attack. My response was definately on-topic, but if I offended anyone then I sincerely apologize. I do stand by my original comments! Find the nearest graphic arts supply store or supplier and talk to someone knowledgeable in the use of ortho materials. If you did this 25 years ago then you were not dealing with ink-jet transparencies, but with film positives and negatives. The exact same materials should be available now as were available then along with some new ones which (in my experience) are much better. The digital age has changed the way we do everything--I have absolutely no use for ortho-chromatic materials any more, but I still know how to use them.(posted 8774 days ago)Fred Imaging Services NASA Marshall Space Flight Center Huntsville, Alabama