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In points, what is a good choke amount for white underbase



 
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Old September 8th, 2010 Sep 8, 2010 12:42:09 PM -   #1 (permalink)
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Default In points, what is a good choke amount for white underbase

I'm curious what distance in points do others use to choke a white underbase? I have played around with different numbers. Working in Illustrator and Corel, I have used as a little as 1 point which translates to .5 on either side of center.

I'm trying to keep the edge as clean/crisp as possible when the top color is applied.

Thanks!
 
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Old September 8th, 2010 Sep 8, 2010 1:48:54 PM -   #2 (permalink)
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Default Re: In points, what is a good choke amount for white underbase

We used to be able to just put a piece of clear plastic between the transparency and the screen but I would think that 1 to 2 is max... I have not screen printed in some years but this is what I remember.. I have also been successful in the past with not underbasing in white but a color closer to the shirt color or the design color... Just my $.02
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Old September 8th, 2010 Sep 8, 2010 2:10:38 PM -   #3 (permalink)
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Default Re: In points, what is a good choke amount for white underbase

I remember a reprographics company that used to do that choke in their darkroom, been awhile. I like the suggestion of the ink close to shirt color.

What happens if you print flash print the color you want to end up with? Wouldn't be any registration issues.
 
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Old September 8th, 2010 Sep 8, 2010 2:32:05 PM -   #4 (permalink)
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Default Re: In points, what is a good choke amount for white underbase

Whatever works for you...1-2pts is typical, in pixels - it depends what your resolution is?
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Old September 8th, 2010 Sep 8, 2010 2:40:41 PM -   #5 (permalink)
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Default Re: In points, what is a good choke amount for white underbase

We normally use 1 pt. inside stroke.
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Old September 8th, 2010 Sep 8, 2010 4:41:58 PM -   #6 (permalink)
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Default Re: In points, what is a good choke amount for white underbase

Quote:
Originally Posted by TimM
I'm curious what distance in points do others use to choke a white underbase? I have played around with different numbers. Working in Illustrator and Corel, I have used as a little as 1 point which translates to .5 on either side of center.

I'm trying to keep the edge as clean/crisp as possible when the top color is applied.

Thanks!
We tend to do .5pt for underbases.
 
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Old September 12th, 2010 Sep 12, 2010 5:41:49 AM -   #7 (permalink)
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Default Re: In points, what is a good choke amount for white underbase

The places i've worked for usually did 2 to 3 point choke white or 1 to 2 point stroke on the top color. Flash curing should not change the registeration at all. Since the shirt is stuck to the platen with spraytack. Never been a problem on either hand printed presses or automatics.
As for the choke/spreads it also depends on the design, colors and shirt colors. And the talent of your printer.
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