Do you guys choke your underbase?

[Prosperi-Tees]

That sounds kinda funny. But do you guys choke your underbase and if so how much, 1 point?

[Dottonedan]

It's my opinion that you should always choke your underbase when it's color over top. If it's white on white, then I say no need. Stroke the underbase no matter if it's vector art or raster art.
Or, only choke the areas that are to have color out on the edge of the art. If it's white and very fine, I leave that alone.

If vector art, I choke by 1.5 Pts-2pts

If raster, your stroking thickness will be based on your resolution. At 300 Rez, I stroke my underbase at 2 pixels. I am for the most part assuming my customers have decent registration.

If on a manual, I will stroke it by 3 Pts unless it's small type.

A 1 pixel stroke at 100 Rez is not the same as a 1 pixel stroke at 300 Rez.

[Fresh Baked Printing]

It's my opinion that you should always choke your underbase when it's color over top. If it's white on white, then I say mo need. Stroke the underbase no matter if it's vector art or raster art.
Or, only choke the areas that are to have color out on the edge of the art. If it's white and very fine, I leave that alone.

If vector art, I choke by 1.5 Pts-2pts

If raster, your stroking thickness will be based on your resolution. At 300 Rez, I stroke my underbase at 2 pixels. I am for the most part assuming my customers have decent registration.

If on a manual, I will stroke it by 3 Pts unless it's small type.

A 1 pixel stroke at 100 Rez is not the same as a 1 pixel stroke at 300 Rez.

Right on. A lot depends on your presses/screen tension, etc., ability to hold register too. There are probably some printers who scoff at those of us who have to trap or choke.

[JBLUE]

For vector I choke it .5 in the center. If its PS and 300 dpi I try to get away with one pixel. At 600 dpi I use two pixels. My auto holds super tight reg and my manual as well. I also over expose the base screen a bit and use the undercutting to my advantage. For some reason when I see a big halo it drives me up the wall even though nobody else notices it.

[Prosperi-Tees]

It is vector and somewhat small type and its black on orange. I do worry about the halo it will leave.

[Frog]

why are you underbasing black on orange?

[Fresh Baked Printing]

why are you underbasing black on orange?

Maybe it's like one of my recent customers who wanted me to underbase black ink on a light colored shirt. I didn't UB and the customer couldn't tell the difference from his last printers order.

[Prosperi-Tees]

whoops reverse that orange on black.

[JBLUE]

If you choke it too much/ and or PFP the orange you will. Orange is already pretty transparent and will go right into the shirt. If this is your first time experiment and see what your equipment will hold. You wont know until you play around and see what you can get away with.

[Prosperi-Tees]

I am gonna try a 1 point since there is some small type and see how it goes.

[JBLUE]

I am gonna try a 1 point since there is some small type and see how it goes.

Next job up today is a orange and white on black. 600 dpi 2 pix choke. I a lot of detail in the frilly sh!t to hold.

[Prosperi-Tees]

Thats what mine is orange and white on black but pretty simple

[Lizard]

I usually choke .75 on most images. 1 pt on really big stuff.  Here is the trick on small lettering.  Leave the base alone and stroke the top color out so the letteres do not lose there integrity.

[whitewater]

I do 1.5-2 for the vector...and 2 pixles for raster...seems to work for me.

[tpitman]

For vector I choke it .5 in the center. If its PS and 300 dpi I try to get away with one pixel. At 600 dpi I use two pixels. My auto holds super tight reg and my manual as well. I also over expose the base screen a bit and use the undercutting to my advantage. For some reason when I see a big halo it drives me up the wall even though nobody else notices it.

Ditto. Up to .65 if it's a fairly big graphic. And overprint without too much pressure. I try to get the overprint to lay right on top of the underbase with almost no overlap.