IJ680cr-dark impression by pinch rollers

[Regina]

Has anyone had recently this problem. 3M IJ680cr material having darker lines appear where the pinch rollers are placed on the material when printing.
We have an older Roland soljet pro III XC-540. This problem has recently appeared with the last 2 rolls we have used. Asked our supplier if anyone else has seen this.
Apparently, no one else has this issue. The work around is to just use the outer rollers and not place any in between, which is not ideal as this material is heavy and on longer lengths the material can move.
The defect shows on the prints. Don't know if manufacturer has changed this material, and can't seem to contact anyone at 3M. Had my machine checked by our tech and everything is fine. Tried lowering the heat and no difference. Any help would be appreciated. Been using this material since we started printing 20+ years ago. Thinking about changing to another. No issues with non reflective material.
We do alot of Police vehicle and emergency vehicles and the 3M is a little more robust to the abuse they get. We like the Oralite for stripes. All of the reflective is ridiculously expensive, so open to suggestions.
Thanks

 

[LizKeenan]

Yes. I work in Fire and EMS. Our installers deduced the tack had been changed causing bruising on white areas of print it didn’t before.

 

[Regina]

Thanks for the info. Don't know what to do about this as there are times that the extra pinch rollers should be used to help material stay put.
Would be looking at different material, even though some of our customers request 3M.

 

[LizKeenan]

Thanks for the info. Don't know what to do about this as there are times that the extra pinch rollers should be used to help material stay put.
Would be looking at different material, even though some of our customers request 3M.

it appears the non IJ material does the bruising far less. You could try 680cr instead of the regular. We also started doing a tape leader for the take up so we could have a straight roll without center pinches. This particular printer in the image has fatter pinches so it doesn’t turn up. We had such good results with the tape leader on our XR 640 Roland we do it on both machines now even when we can have all pinch rollers engaged.

 

[Regina]

it appears the non IJ material does the bruising far less. You could try 680cr instead of the regular. We also started doing a tape leader for the take up so we could have a straight roll without center pinches. This particular printer in the image has fatter pinches so it doesn’t turn up. We had such good results with the tape leader on our XR 640 Roland we do it on both machines now even when we can have all pinch rollers engaged.

Thanks Liz for the pic. Our machine is older so we don't have the advantage of the fatter pinches. We do have the take up but we find our heaters don't adequately dry the print to allow roll up. I could see that would help out the situation. More importantly 3M IJ 680 cr is what we use and 3M should advise when they change the adhesive creating this problem. Good to know it has been noticed by others. Thanks again