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Discussion Starter #1
Hey, everyone - somebody is asking me for a quick run of shirts, and I'm not sure what the best method is for the art they've provided. It's almost all gradients.

It's a JPG, but it's pretty high-res. Is it better for me to vectorize it, or get out the magic wand in photoshop? index/halftones?

Thanks for any input!

 

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from the sample you've shown i'd suggest halftones for that design, not index (halftones produce much better gradients).

I wouldn't vectorize it if the resolution is at least 300dpi at the print size. even tho there maybe some jpg artifacts i don't think it will show up much or could be easily adjusted. If it's just black and purple then it should be fairly easy to separate in photoshop.

after looking at the graphic again, i'd recommend contacting the client and asking if they have the original file, it could have been created as a vector or they may have a photoshop file, better to work with then a .jpg
 

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Discussion Starter #3
Thanks!
It is just purple and black. Truth be told, I've only had a press capable of registering a job like this for a few days. A bit nervous, but I'm sure all will turn out well.
So separate to different channels, save out to files, convert to bitmap... Do the screen angles matter with only two colors?
 

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ya the angles still matter, any time your using halftone dots you want to avoid moiree so using an angle around 22degrees is a good idea. use the same angle for each color as you will idealy want each dot to fall into the negative space of the other color.

For 2 color jobs i often prefer to do my halftones in photoshop. I do this so i can punch out the halftone dots of the top color from the color underneath so my dots are exact.

my recommendation when doing this separation (no RIP needed for this)., focus on creating the black channel, make a new document to work from and create the bitmap halftone, convert back to grayscale so you can copy the channel back to your original working file. You can make the purple channel simply by convert it to grayscale, adjust levels so your solid purple area becomes 100% black (make a copy of the document to work on). Convert to bitmap and create your halftones, then convert back to grayscale. Now you copy this channel back to your original document and punch the black channel out of the purple.
 

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for most work i charge a flat fee based on number of screens and the type of separation.
I do charge a per hour rate for graphic work (if the design needs cleaning up, enhancing, altering, color correction, ect..) minimum of 1 hour. This charge is separate from the separation charge.
 
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