Polyester Back showing on front

[Maxie]

I think this has been mentioned before but I don't remember the solution.
We printed on light green 100% polyester shirts in white  and the print on the back is showing throught the front.
Could be not cooking the shirts after the dryer?
Bleeding?

[BP]

I had this happen a few weeks ago. I re-printed the order with another shirt brand with no problems.

[Flash Ink]

We had that problem as well. You can send all the garments through the dryer before printing to get rid of some of that extra sublimation ink that is leftover from the production process. Or what we do is use a base blocker. You put it down first and it blocks any sublimation that may happen during the drying process.

[Zelko-4-EVA]

I think this has been mentioned before but I don't remember the solution.
We printed on light green 100% polyester shirts in white  and the print on the back is showing throught the front.
Could be not cooking the shirts after the dryer?
Bleeding?

we have had that happen before - the polywhite that we were using had peroxides in it and were "bleaching" (maybe theres a better term for it) the shirts when they were stacked. 

your ink manufacturer (or someone on TSB) could point you to a non bleaching polywhite ink.

[Frog]

Stacking hot exacerbates this situation. A cool down fan strategically placed at the exit so as not to blow into the tunnel can help.

[RICK STEFANICK]

We had that problem as well. You can send all the garments through the dryer before printing to get rid of some of that extra sublimation ink that is leftover from the production process. Or what we do is use a base blocker. You put it down first and it blocks any sublimation that may happen during the drying process.

Sorry to disagree but running them down the dryer first will make the issue much much worse. Once a garment starts to sublimate there is no stopping it you can only block it. The issue is when blended garments are being dyed it is a 2 part process. no heat is needed dying 100 percent cotton( that's why the NEVER bleed) . The second part of the process with blends requires heat to set the dye( laymans terms). If they don't use enough heat they will sublimate. That's why some garments sublimate worse than others and at lower temps.

[Maxie]

I did a test with Rutland Grey barrier base and it did not show through the back.
I’m reprinting today with a grey base.

[RICK STEFANICK]

I did a test with Rutland Grey barrier base and it did not show through the back.
I’m reprinting today with a grey base.

THAT IS GREAT STUFF. We use that here with excellent results.

[StinkyDaddy]

I use Wilflex Bleedblocker Grey as a base and it works as well. I called Wilflex when I started printing poly and they warned me about this "ghosting".  The dude I talked to suggested the bleedblocker as a way to avoid it. Another upside is that you can print regular plastisol on top of the blocker and run it thru at 320 with no migration. I've used this with A4 digital camo poly and it worked super.

[blue moon]

I think this has been mentioned before but I don't remember the solution.
We printed on light green 100% polyester shirts in white  and the print on the back is showing throught the front.
Could be not cooking the shirts after the dryer?
Bleeding?

we have had that happen before - the polywhite that we were using had peroxides in it and were "bleaching" (maybe theres a better term for it) the shirts when they were stacked. 

your ink manufacturer (or someone on TSB) could point you to a non bleaching polywhite ink.

this!

[BRGtshirts]

That sounds like reverse ghosting?!  Wow, never heard of that happening before, but you're saying it's transferring to from front to back, vs. from one shirt to another within a stack?

I'm only chiming in late because someone mentioned different stacks. We typically stack our poly in 3 stacks at the end of the dryer in a rotating basis. By the time you you "go around the loop" the top shirt that is getting covered is already cool to the touch. This eliminated the hot stacks for us.  Also are using the Rutland barrier grey, so typically just being extra safe as we print a lot of poly and have been burned by migration too many times in the past.

[Frog]

That sounds like reverse ghosting?!  Wow, never heard of that happening before, but you're saying it's transferring to from front to back, vs. from one shirt to another within a stack?

I'm only chiming in late because someone mentioned different stacks. We typically stack our poly in 3 stacks at the end of the dryer in a rotating basis. By the time you you "go around the loop" the top shirt that is getting covered is already cool to the touch. This eliminated the hot stacks for us.  Also are using the Rutland barrier grey, so typically just being extra safe as we print a lot of poly and have been burned by migration too many times in the past.

Maxie was a little unclear on thisbut I took it to be the common problem of the hot back transferring to the front of the shirt beneath when stacking. We could all benefit from a good, accurate description of just how the initial shirts were stacked. (thoough a moot point with the anti-ghosting inks)

[Maxie]

Frog, I didn't think of that.   I assumed it was from the same shirt, could have been wrong.
I solved the problem by printing with a grey barrier base but I'll check what you mentioned, thanks.