Thanks for the reply.
Firstly, let me tell you what my gut feeling is - but I have no experience yet as I'm a new owner.
The white ink carts were held up in UK customs for 3 weeks - they were just stuck in a bonded warehouse and not moved. Would this cause separation?
As for the pretreat. I didn't apply the pretreat so cannot comment. I belive it was done by a pretreat machine a couple of months ago. However, the printing on other shirts from the same batch seemed to be very good.
I've purposely printed to an untreated shirt so I can be aware of the effect.
The white ink in the lines seems to be a good white but, the ink that lays on the surface of the shirt seems to be quite watery. As I have nothing to compare this to, I could be wrong.
After producing the print in the picture, I removed the carts and gave them a thorough shaking for about 10 minutes, of course I can't do the same to the ink in the lines
Just some of my thoughts.