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screen printing => General Screen Printing => Topic started by: im_mcguire on August 14, 2019, 12:20:13 PM

Title: What would cause this?
Post by: im_mcguire on August 14, 2019, 12:20:13 PM: I know this has been covered before, but Im just looking for some more insight. What could we do to prevent this? Most of our jobs come through, and we don't have a issue, or if there is normal wear and eventual cracking on a print, most people understand its the nature of the printing process.

But this is a shirt we printed over a year ago for a basketball team. Just looking to not do what we did before.

Underbase - Rutland Premier White
Top colors - Rutland M3

Is this over flashing?

Thanks!
Title: Re: What would cause this?
Post by: Colin on August 14, 2019, 01:35:16 PM: That looks like long term abrasion to me. But...

There are a couple spots where - maybe - some undercure. But its hard to see 100%.

Is the ink rubbing off all the way to the shirt? Stretch test?
Title: Re: What would cause this?
Post by: cbjamel on August 14, 2019, 01:54:18 PM: the colors are touching the white screen and kissing it, tension or off contact.
Shane
Title: Re: What would cause this?
Post by: Homer on August 14, 2019, 02:23:02 PM: I'd say over flash.
Title: Re: What would cause this?
Post by: BP on August 14, 2019, 02:39:20 PM: Looks to be over cured.
Title: Re: What would cause this?
Post by: Sbrem on August 14, 2019, 03:21:21 PM: I'll join the over-flashed group.

Steve
Title: Re: What would cause this?
Post by: RICK STEFANICK on August 14, 2019, 03:52:24 PM: I am in the over flash group also. Just wondering though why you would under base the black?
Title: Re: What would cause this?
Post by: sportsshoppe on August 14, 2019, 04:09:10 PM: Quote from: BP on August 14, 2019, 02:39:20 PM
Looks to be over cured.
I agree
Title: Re: What would cause this?
Post by: Orion on August 14, 2019, 05:10:38 PM: Looks as if there is some issue with the white in the beak. If you used only one white your problem is not overflash delamination it is undercure.
Title: Re: What would cause this?
Post by: im_mcguire on August 16, 2019, 02:00:40 PM: Quote from: RICK STEFANICK on August 14, 2019, 03:52:24 PM
I am in the over flash group also. Just wondering though why you would under base the black?

Sorry, Im just getting back to this topic. My guess was that it got overflashed. OK So we underused the navy blue because this particular design went on 6 different color shirts. White, light blue, orange, tan, Dark Grey, and Navy (go Figure) and the coach was adamant about the colors all being consistent between each shirt color. Thats why we did a underboss under the navy. Also, they didn't want to pay for multiple setups/screens on the base.

OK. We are reprinting this again this year, and will try and keep the flashes down better.

Thank you everyone!
Title: Re: What would cause this?
Post by: blue moon on August 17, 2019, 02:03:32 PM: Pretty certain it is undercure rather than an over. Rick Roth has done extensive testing and shown that ubase overcure seems to be a myth. I tend to agree as with all the shirts we use for testing and print over the previous prints there are never any issues with adhesion. I am willing to bet $100 overflashing is not the problem. Any takers?

Make sure its cured when going through the dryer!
Pierre
Title: Re: What would cause this?
Post by: Frog on August 17, 2019, 03:40:43 PM: Quote from: blue moon on August 17, 2019, 02:03:32 PM
Pretty certain it is undercure rather than an over. Rick Roth has done extensive testing and shown that ubase overcure seems to be a myth.
Pierre

I know that over the years, I have been asked to print over an existing print, for one reason or another, and did not have an adhesion problem.

That said, I have also seen ink, especially whites start to wear and crack prematurely from over curing.
Title: Re: What would cause this?
Post by: tonypep on August 17, 2019, 04:54:31 PM: Many, many things.
Title: Re: What would cause this?
Post by: Lizard on August 17, 2019, 08:27:50 PM: If you are getting M3 navy to print that opaque on top of a base you are putting down a whole lot of ink. The print needs a lot more cure time. Other than that it's a pretty nice distress print.
Title: Re: What would cause this?
Post by: Ross_S on August 18, 2019, 11:03:42 AM: Under Cured for sure I agree with Pierre on this. Plus navy, royal, purple etc have horrible wetting properties (Adhesion to the base) when underbasing and tend to do this. However, the yellow is wearing off and thats the sign it's undercured.

I'm also guessing that you print flash printed the base before the top colors and that will create the issues with your navy (I'm guessing you did this)