Digital BW, The Print

Hi there,

I have a tint file that was producing beautiful nuetral prints from my 
Epson printer and Epson Matte paper: until I got a new set of ink 
cartridges. Now everything is a ghastly green! Furthermore the green 
gets stronger over about 3 days.

I have probably just been unlucky and bought a bad batch number. I hope 
so because every new tint I have tried has also led to a greenish print 
after 3 days, to some degree or other.

Has anyone else experienced bad batches of ink from Epson?

Graham