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+   T-Shirt Forums > T-Shirt Industry Information > Direct to Garment (DTG) Inkjet Printing > BelQuette > [MOD-1 DTG] Print not holding up after one wash
Thread: Print not holding up after one wash Reply to Thread
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Topic Review (Newest First)
March 17th, 2014 02:36 AM
Printzilla
Re: Print not holding up after one wash

The first thing that comes to mind is the Gildans. I know some have reported issues with the new treatment Gildan started using a year or so ago. Over all Gildans have a pretty poor reputation in the DTG world.

Have you tried a quality ringspun? Or any other shirt? I am curious if it is still happening on other T's.
March 15th, 2014 09:08 PM
AGELLC
Re: Print not holding up after one wash

I can mail some samples this week. I am going into our shop tomorrow to experiment with different temps and curing times and do some wash tests. I really wonder if something is up with our heat press. Yesterday when I was adjusting the pressure setting from high (8/9) to low (1/2), it kept reading 3 no matter how much I turned the knob. At one point it should have read 0 because adjusted it so much that, when pressed, it hovered slightly above the pad. I never saw this problem until yesterday so I've reading up on the press today to see if there is anything I can do to make sure that the press is functioning properly (besides using the heat gun). I really do think that we are pretreating correctly and really almost all of our prints have come out great since my visit. We've never seen the ink crack/flake off on our shirts. Everything you taught me has been extremely helpful and I am very appreciative of all of your and Matt's help! I will send some info and samples to you this week.
March 15th, 2014 05:33 PM
JeridHill
Re: Print not holding up after one wash

Hannah, very sorry for your troubles. It is very difficult for me to tell what's happening with your photos. If you wanted to send me samples of what is happening, before and after, I would have them first hand and be able to possibly tell what could be happening better. We could also print samples here using the same shirts you are using and do some wash tests.
March 15th, 2014 08:53 AM
AGELLC
Re: Print not holding up after one wash

Jerid, we are still having trouble with the color layers washing out, and we are so stumped and frustrated. I do not understand why this is happening, and I have tried everything you guys told me to try. We added the washers to the bracket, which did help reduce graininess and improved clarity in our prints. We bought the heat gun and have adjusted the heat press accordingly to 350 degrees. I've attached 4 images to this post. Two are before images and two are after images. This is the exact process that I used to make these shirts:

-Whipped and pressed lightly a Gildan UC2000 100% cotton to flatten/iron stray fibers
-With an HVLP Wegner spray gun, I sprayed the shirt in the same manner that you showed me the day I went to the BQ facility. Sprayed it evenly with the white ink pretreat mixed at 1:1 pretreat-water ratio until it was wet, but not so saturated that it was dripping.
-With teflon paper, pressed the shirt under a very light (1-2) pressure for ~15 seconds at 350 degrees per the reading from the heat gun. Lifted the press and paper and let it air out for a few seconds
-Adjusted pressure to 8/9 and pressed for 60 seconds with teflon paper.
-Printed the white layer using the 30 second timed pass setting. Printed the color layer after. The print looked great at this point.
-Cured the print with 1-60 second press at 2 pressure with parchment paper. Removed the parchment paper for a few seconds to air out steam, then pressed for 60 more seconds at 2 pressure.
-Brought home to wash the shirt and color layer is still washing out. I really don't know what else to do at this point. I have ruined many shirts due to this and I just don't know what else to do.

Please let me know if there is anything else you can think of to fix this issue.
February 26th, 2014 07:52 PM
JeridHill
Re: Print not holding up after one wash

Different shirts will accept pretreat better than others. As you are experiencing, there are many variables and all can slightly or drastically effect how the white layer performs. The idea is to keep it as consistent as possible. A loose weave vs. tight weave will require more pretreat to get a nice solid white. So when you lay the right amount down, you can increase/decrease the amount of white ink in the RIP across the board (Hopefully that makes sense!)

To lower your white ink, you can go into the RIP in the settings and lower the percentages on the back end. If you are getting too much pooling, drop your white ink percentage (0-100%) in the back end by 5%. This is across 4 channels, so 5% can make a big difference. If it is still pooling, do another 5% until you get a great white without pooling. It depends on your climate, but I have printed consistently at 68% white, so fine tuning it will allow you to print immediately without having to wait.
February 26th, 2014 07:47 PM
Anonoprinter
Re: Print not holding up after one wash

Occasionally, we'll get a design that has so much white that it pools on the shirt and needs to rest for more than a minute in order to settle into the weave a bit. This also seems to be related to how much pretreat is used (heavier pretreat seems to make pooling more likely.)

What's the best way to cut back on the white and how much should you dial it back on the first adjustment (for example: try 1/4 or 1/2 of the available adjustment?) I'm thinking the white density 0-50 slider in the rip is the way to do it right?
February 26th, 2014 03:04 PM
JeridHill
Re: Print not holding up after one wash

I would lower the temperature a little mostly to prevent scorching of the shirt.
February 26th, 2014 11:28 AM
AGELLC
Re: Print not holding up after one wash

Quote:
Originally Posted by JeridHill
Letting it set too long could possibly cause problems. If the white dries too much, the color layer maybe sitting on the top and not merging with the white enough. Use the timed auto rapid second pass for your ink control. If you are away, set it to 1 minute. The first layer will print and sit, the 2nd layer will go back in after 1 minute and print. It's not necessary to have it set for that long, but if you are printing and walking away, it shouldn't matter.
And what about the temperature being 17 degrees hotter than 350? Is that causing problems? Should we lower the temp?
February 26th, 2014 10:03 AM
JeridHill
Re: Print not holding up after one wash

Letting it set too long could possibly cause problems. If the white dries too much, the color layer maybe sitting on the top and not merging with the white enough. Use the timed auto rapid second pass for your ink control. If you are away, set it to 1 minute. The first layer will print and sit, the 2nd layer will go back in after 1 minute and print. It's not necessary to have it set for that long, but if you are printing and walking away, it shouldn't matter.
February 26th, 2014 09:49 AM
AGELLC
Re: Print not holding up after one wash

Also, I can't remember what the press is called offhand and I'm not in the office but it is the kind with the knob at the top that we turn for the pressure adjustment.
February 26th, 2014 09:46 AM
AGELLC
Re: Print not holding up after one wash

Hey Jerid, just to update, we got our laser heat gun in. When set to 350, our press is heating to 367. Should we actually lower the temperature to get it to 350? Could that be causing the problem? Also, does it matter if we let the white layer sit too long before we send the shirt back in for the color layer print? Sometimes we are multitasking and don't send the color pass in until 10 mins (or more) after the white layer has been printed.
February 21st, 2014 01:47 PM
JeridHill
Re: Print not holding up after one wash

Removing the parchment paper wouldn't be necessary, it just helps release the moisture before pressing it for the second time. If your press isn't getting up to temperature, more time may not help. You could try it and see, but getting the press to temp is more critical to consistent wash tests.

What heat press are you using?
February 21st, 2014 12:58 PM
AGELLC
Re: Print not holding up after one wash

Hey Jerid! It looks like just the color is coming off. I had e-mailed Matt earlier with these questions too so he has some images of one of the shirts that we had the problem with. We will get the laser gun and check out the heat press and report back. Do you think we should press for an additional 30 seconds? Also, we had not been removing the parchment paper between the two 1-minute presses. Could that be a factor?
February 21st, 2014 12:15 PM
JeridHill
Re: Print not holding up after one wash

Hannah, I would test your heat press to determine if it is getting up to the correct temperature. There are Raytek laser heat guns or heat test strips you could purchase from a screen printing supply company.

Is the ink flaking off or just the color coming off?
February 21st, 2014 11:36 AM
AGELLC
Re: Print not holding up after one wash

We here at AGE are still having wash issues with our prints. The prints have been looking great coming off the printer, but when it comes down to it, the color layer is washing off. Here is our process:

-Apply 1:1 ratio pretreat mixed with distilled water until shirt is wet but not dripping
-Place on heat press with teflon paper, press with light (1) pressure for ~10 seconds to get rid of the initial moisture (at 350 degrees)
-Press at 9 pressure/350 degrees with teflon paper until steaming has stopped
-Print image, then cure with two 60 second presses at pressure of 2 at 350 degrees with the parchment paper

Our prints have been looking good but have not withstood wash tests. We also lowered our white ink volume to 95% and are mindful to make sure the white ink layers are drying before we send the color layer to print.
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