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what makes a print crack & wash off?

 
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Old February 23rd, 2006 Feb 23, 2006 1:12:17 AM -   #1 (permalink)
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Default what makes a print crack & wash off?

i notice some printed shirts last longer than others... is there a technique that will ensure my screen prints last, and don't wash off too easily?

the last thing i want to do is sell an inferior product... i want people to be return customers.
 
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Old February 23rd, 2006 Feb 23, 2006 1:14:17 PM -   #2 (permalink)
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Default Re: what makes a print crack & wash off?

What type of printing are you talking about?

Are you going to be printing the shirts yourself?
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Old February 23rd, 2006 Feb 23, 2006 7:04:50 PM -   #3 (permalink)
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Default Re: what makes a print crack & wash off?

Quote:
Originally Posted by Rodney
What type of printing are you talking about?

Are you going to be printing the shirts yourself?
Rodney. it will be screen printing.... check the other thread you posted in to me... thanks.
 
 
Old February 23rd, 2006 Feb 23, 2006 9:00:29 PM -   #4 (permalink)
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Default Re: what makes a print crack & wash off?

Generally undercuring the ink will cause it to crack and wash off.
 
Old February 23rd, 2006 Feb 23, 2006 10:57:25 PM -   #5 (permalink)
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Default Re: what makes a print crack & wash off?

Quote:
check the other thread you posted in to me... thanks.
Too many threads here to try to cross reference, but thanks for the clarification

I agree that undercuring or even too long in the dryer will make a screen printed shirt crack.

If you are getting the shirts printed through someone else, there really isn't a "technique" to make them not crack, that should be the standard of any quality screen print.

edit: I'll move this to the "Screen Printing" forum so hopefully it'll get more screenprinting specific attention there.
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Old March 4th, 2006 Mar 4, 2006 12:33:11 AM -   #6 (permalink)
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Default Re: what makes a print crack & wash off?

If you are using plastisols
Cracking and washing off is usualy under cure
Shiny and sticky prints over cure.
With water based rub the print with a piece of white cloth if you get any colour on cloth then your probably undercured.
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Old January 14th, 2009 Jan 14, 2009 10:15:58 AM -   #7 (permalink)
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Default Re: what makes a print crack & wash off?

I am having an issue with my black ink coming off. I am using QuantumOne ink by Wilflex. We've been printing for many years so I know the shirts need to be cured properly and the specs say 340 degrees. The tees are definitely hitting that mark for 6-8 seconds through an M+R Sprint HO conveyor dryer. White shirts look great after a wash. Gildan kelly green shirts....the ink comes right off. American apparel red shirts the ink comes right off. I've sent Wilflex samples to see what they think. It's driving me nuts!
 
Old January 14th, 2009 Jan 14, 2009 10:20:18 AM -   #8 (permalink)
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Default Re: what makes a print crack & wash off?

you need to cure plastisol ink at 550 to 570 and I set my belt at 2.5 and a scale of 10 i wash my t-shirt over and over I have 10 years old t-shirt and it never comes off.

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Old January 14th, 2009 Jan 14, 2009 10:24:55 AM -   #9 (permalink)
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Default Re: what makes a print crack & wash off?

Sorry sir but if you put a white t shirt through a dryer at 550 degrees you will burn it(it will turn yellow). Plastisol ink cures at between 320 and 340 DEGREES.
 
Old January 14th, 2009 Jan 14, 2009 10:28:08 AM -   #10 (permalink)
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Default Re: what makes a print crack & wash off?

not if you put the belt fast enough . my dryer is set to 570 all the time never burnt a t-shirt in 12 years
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Old January 14th, 2009 Jan 14, 2009 10:36:02 AM -   #11 (permalink)
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Default Re: what makes a print crack & wash off?

570 c* or 570 f* ?? I believe you, though every ink manufacturer I speak to says to cure the ink between 320 and 340 f* what kind of ink are you using?
 
Old January 14th, 2009 Jan 14, 2009 10:36:57 AM -   #12 (permalink)
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Default Re: what makes a print crack & wash off?

http://selectdesign.com
 
Old January 14th, 2009 Jan 14, 2009 12:05:45 PM -   #13 (permalink)
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Default Re: what makes a print crack & wash off?

I think the confusion here is that etshirt is saying his dryer is set to a temp of 570... not that the shirts are hitting that mark.

But yeah, that's right... if a shirt goes to 570 it'll scorch like a big dog. I would imagine that his shirt is passing through at a rate that only lets the temp get to 330-350.
 
Old January 14th, 2009 Jan 14, 2009 12:16:11 PM -   #14 (permalink)
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Default Re: what makes a print crack & wash off?

nicely put.
 
Old January 18th, 2009 Jan 18, 2009 4:19:48 PM -   #15 (permalink)
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Default Re: what makes a print crack & wash off?

When I first started I did numerous tests to find out how to increase the washlife of my prints so my customers would be receiving the best value for money possible.

From my experience I have found with plastisols when you print/flash/print if the first layer of ink is held under the spot curer for longer than necessary and then another layer is applied you may well find you are infact printing over ink that has already fully cured. Im pretty sure that plastisol can not bond to an undercoat that has already fully cured and therefore after a few washes the top layer cracks to reveal the under layer.
Or if you are finding a noticable discouloration and instant fade in the pattern after the first washes this is generally down to the design not reaching its full curing temperature in your dryer.
 






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