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[Kornit General] Curing/Ink washing out...

 
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Old July 22nd, 2015 Jul 22, 2015 1:03:32 PM -   #1 (permalink)
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Default Curing/Ink washing out...

Helllo,
I have been printing on a Kornit Storm 2 for about 3 months now and have recently had a few complaints about the ink washing out after one wash. I was wondering if perhaps I wasn't curing them correctly/or long enough or if I wasn't curing it at the right temperature.

Generally I cure like so:

No white underbase: 25-35 percent fixation cure for about 5-7 minutes.
Single white underbase: 40 - 60 percent fixation cure for about 6-8 minutes.
Double white underbase: 60-80 percent fixation cure for 10-12 minutes.

Is this correct? I know there are many variables, but some insight from anyone out there on the web would help.

Thank you all very much.
 
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Old July 23rd, 2015 Jul 23, 2015 4:36:25 AM -   #2 (permalink)
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Default Re: Curing/Ink washing out...

What Temp are you curing at?
 
Old July 23rd, 2015 Jul 23, 2015 4:56:48 AM -   #3 (permalink)
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Default Re: Curing/Ink washing out...

I was curing at 305 degrees and when I called Kornit and asked if I was doing it right they told me to cure longer at 290 degrees. Does that sound about right?
 
 
Old July 23rd, 2015 Jul 23, 2015 9:06:55 AM -   #4 (permalink)
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Default Re: Curing/Ink washing out...

All ours go through at about 300 for 10 mins
 
Old July 23rd, 2015 Jul 23, 2015 11:04:38 AM -   #5 (permalink)
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Default Re: Curing/Ink washing out...

I would do 320F 6-10 mins on dark covered shirts and 1-3 mins on white all of these are subject to change because it also depends on the size of your print. You can always tell if it dry by smelling the garment, if you smell "pickles" toss it back in for a few more mins
 
Old July 23rd, 2015 Jul 23, 2015 1:52:19 PM -   #6 (permalink)
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Default Re: Curing/Ink washing out...

Hello:

We have the Storm 931DS and the Storm II. Since both machines run different white and dark level settings, we have found that curing garments at these settings work well.

100% Cotton Whites - 290 Degrees @ 6 minutes (1 Pass)
100% Cotton Darks - 290 Degrees @ 8 minutes (1 Pass)
50/50 Cotton/Poly Whites - 260 Degrees @ 6 minutes (2 Passes)
50/50 Cotton/Poly Darks - 260 Degrees @ 8 minutes (2 Passes)
100% Poly White - 185 Degrees @ 6 minutes (3 passes)
100% Poly White - 185 Degrees @ 8 minutes (3 passes)

This goes for using either single white or double white. Also, keep in mind that this is for a dryer that has 8 heat chambers so it can vary depending on your dryer settings.
 
Old September 17th, 2015 Sep 17, 2015 2:02:26 PM -   #7 (permalink)
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Default Re: Curing/Ink washing out...

If increasing the temperatures doesn't work, you can also try decreasing the spray.
If you have too much spray the ink won't bind correctly to the garment.
 
Old October 7th, 2015 Oct 7, 2015 9:56:26 PM -   #8 (permalink)
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Default Re: Curing/Ink washing out...

Got same problem with our Storm II.. we got it 3 days ago, did my first wash test today.. the CMYK layer on the white seems to have taken some damage already..
we do 320 8 min. on all..

can you over-cure. ? - is 300 10min better. ? - we use the oven from kornit they recommend.. Cavazzuuti Dual..
 
Old February 23rd, 2016 Feb 23, 2016 2:13:39 PM -   #9 (permalink)
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Default Re: Curing/Ink washing out...

Quote:
Originally Posted by brixen
Got same problem with our Storm II.. we got it 3 days ago, did my first wash test today.. the CMYK layer on the white seems to have taken some damage already..
we do 320 8 min. on all..

can you over-cure. ? - is 300 10min better. ? - we use the oven from kornit they recommend.. Cavazzuuti Dual..
Every oven is going to be different if I'm not mistaken. The the M&R Sprint 2000, I have found that Cotton Shirts (Darks) dry really well at either single white or double white @ 290 degrees for 8 min. Whites are usually the same temperature for 6 minutes. I would double check the dryer setting and see if you are getting a steady amount of air circulating through the dryer. You can use a pyrometer to check the temp. Kornit recomments 350 degrees for 4 min, however I tried that on whites and it burnt the shirt.
 
Old 3 Weeks Ago May 21, 2019 9:12:56 AM -   #10 (permalink)
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Default Re: Curing/Ink washing out...

300 for 12mins has been pretty solid for us.
 






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