We've been doing a lot of research and now, it's even happening to some of the aluminium composite boards as well. We have customers with Cor-X
signs from 5 years ago, not experiencing any problems. About 2 months ago, I went by a place where we did some
signs on aluminum composite from some of our first
signs done with our machine from 2009. The
signs face south and take a beating UV-wise and still look perfectly fine. Colors were black, light and medium blue and red. I've looked at many of our earlier
signs, and they all made it through without problems. The ink has not changed, but we've found by using a different manufacturer for substrates, we get our old results back. The only thing we've changed on the machine is we've stepped up our bulb type. It supposedly puts out at a better rate completing a better first adhesion resulting in not cracking or many other stoopid problems.
Other than the speed of our machine, we've become happy with it again. It's been suggested by many people the ink recipe has been changed, but I don't think that's what happened, as we can force the issue by buying a better grade of substrates and then not experiencing the problems anymore.
One other thing we do is to not cut anything for at least 24 hours if at all possible. That just takes better planning on our part.
I know my next machine will be a CET and I know for a fact Dave is a real stand up person. I have 100% faith in him and his machines. When we pull the string on it, we will become partners so to speak.