Hello from UK,
Long story - short. We have a Colorado M3W which purchased last year with our main purpose being to print
windows graphics in white ink mainly on gloss PET films. After vigorous testing of the white inks for robustness and adhesion on almost every film we use (PET, PVC, etc.), all were fine until few months ago when our fitters started noticing that the ink when applied started scratching with a hard squeegee and left a "milky" like residue after spraying a soaped water for application. To explain - if you print a light fade in white ink, the light-covered area (from 0 to 40-50% ink amounts) is very easy to scratch. Since I adjusted all profiles in Caldera to the maximum possible 36 deg. temperatures and raised the cure UV lights to maximum level 5 with no effect at all, the problem persists. We're experiencing issues with adhesion on glossy PET films.
Has anyone else encountered similar problems with white inks on their Colorado M3W?