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[Kornit General] White T-Shirts Staining - where from?

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  • 1 Post By KobraRoyal69
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Old September 27th, 2017 Sep 27, 2017 4:22:58 AM -   #1 (permalink)
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Default White T-Shirts Staining - where from?

Hello!

We have been having some serious problems with staining on a lot of our white garments. We have no idea where this is coming from - has anybody had any similar problems in the past or have any ideas what could be causing this?

We use Kornit Avalance 1000 machines and Electric Chiossi Dryers.

We dont know if it could be something to do with;
  • The Fixation
  • The Garments
  • The Dryers
Any help would be great!

Nic
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Old October 1st, 2017 Oct 1, 2017 5:24:36 AM -   #2 (permalink)
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Default Re: White T-Shirts Staining - where from?

Hi
We have already had this problem in the past, the problem came from our t shirt manufacturer who used a chemical agent to whiten t-shirts and it is this treatment that made this kind of reaction in contact with kornit fixing agent.

Are you at what rate of fixing agent?
What are the settings of your drying tunnel?
 
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Old October 4th, 2017 Oct 4, 2017 10:52:36 PM -   #3 (permalink)
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Default Re: White T-Shirts Staining - where from?

too high drying temperature.
for each material, the drying temperature must be selected. A yellow patch is a burnt spray.
 
 
Old October 4th, 2017 Oct 4, 2017 11:38:58 PM -   #4 (permalink)
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Default Re: White T-Shirts Staining - where from?

Quote:
Originally Posted by KobraRoyal69
the problem came from our t shirt manufacturer who used a chemical agent to whiten t-shirts and it is this treatment that made this kind of reaction in contact with kornit fixing agent.
+100500 & high temperature...
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Old October 4th, 2017 Oct 4, 2017 11:57:54 PM -   #5 (permalink)
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Default Re: White T-Shirts Staining - where from?

Yes indeed for this problem that I had at the time I lowered the percentage of fixation agents and increased the speed of my drying tunnel to avoid wasting time but the problem also came from my manufacturer who had used for a lot a chemical to bleach t-shirts
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Old November 29th, 2017 Nov 29, 2017 1:37:44 PM -   #6 (permalink)
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Default Re: White T-Shirts Staining - where from?

I would agree that it is being over cured. The fixation needs the right combination of air and heat to evaporate properly. By pushing too much heat, too quickly, this burning can occur. For small burns, or light discoloration, you can try to spray some hydrogen peroxide on the burned area, and run it quickly down the dryer again. Sometimes this will help remove the burns.
 
Old July 4th, 2018 Jul 4, 2018 11:10:28 PM -   #7 (permalink)
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Default Re: White T-Shirts Staining - where from?

good day all, we have experienced the same on our garments. 40% fixation and a curing time of 4 min @ 160 deg celsius , what would the recommendations be, thanks in advance
 
Old July 5th, 2018 Jul 5, 2018 5:49:58 AM -   #8 (permalink)
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Default Re: White T-Shirts Staining - where from?

Quote:
Originally Posted by Jayz76
good day all, we have experienced the same on our garments. 40% fixation and a curing time of 4 min @ 160 deg celsius , what would the recommendations be, thanks in advance
No way to guess...too many variables.
Make scraps out of a few t-shirts, and test-test-test, until you find the right combination.
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Old July 5th, 2018 Jul 5, 2018 6:47:26 AM -   #9 (permalink)
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Default Re: White T-Shirts Staining - where from?

Quote:
Originally Posted by Jayz76
good day all, we have experienced the same on our garments. 40% fixation and a curing time of 4 min @ 160 deg celsius , what would the recommendations be, thanks in advance

I would try a lower fixation % - closer to 10-20%, and reduce your temperature to more like 145c.
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Old July 11th, 2018 Jul 11, 2018 3:16:18 AM -   #10 (permalink)
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Default Re: White T-Shirts Staining - where from?

We had this issue when starting out also - 10/15% spray 155c for dryer temp - curing time 3.5mins does the trick everytime.
 
Old July 11th, 2018 Jul 11, 2018 5:59:32 AM -   #11 (permalink)
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Default Re: White T-Shirts Staining - where from?

Quote:
Originally Posted by darren89
We had this issue when starting out also - 10/15% spray 155c for dryer temp - curing time 3.5mins does the trick everytime.
Will this work for every dryer?
The only way to make sure, is testing different settings with scraps.
 
Old July 11th, 2018 Jul 11, 2018 6:00:43 AM -   #12 (permalink)
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Default Re: White T-Shirts Staining - where from?

Well we have a tunnel dryer and we have 3 in the factory same settings for all 3 different dryers.
 
Old March 27th, 2019 Mar 27, 2019 9:09:50 PM -   #13 (permalink)
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Default Re: White T-Shirts Staining - where from?

hi we have this often, it is the fixation causing a chemical reaction with the starch in the cotton tee or the whitening agent, this should disappear after one wash.
 






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