If I am printing on a yellow 100% polyester shirt, do i have to lay down a white under-base before I lay down my final color which will be green. The ink seems thick enough. I am using Union inks thank you ahead of time.
Possible it may work. You might need to print flash print depending on how dark the green is. 100% Poly are notorious for sublimating. If the green is too light the dye will migrate into the ink quite a bit.
Printing on 100% polyester 
