Digital workshop- Bit map and halftone

Today we had a digital workshop based more around halftone, which was so useful for screen printing.

Process:

On Photoshop
Ensure it's on Greyscale mode
Channels -> = -> New Spot Layer -> choose colour
(black will equal solid, white will be negative space, use tones in between)
- paint/magic wand in where you want the tones
- Once happy, save as PSD (ensuring spot colors is checked)

Then:
On Illustrator
New document -> File -> Place saved photoshop document
Window -> Separation preview
(check overprint preview- turn others off the ensure spot colour will work)
File -> Print -> Output ->
Mode -> Separations
Set frequency (lpi- Lines per Inch)
      - Upper limit 65- very fine but will screen print
      - Lowest really 20, will be distinct
(Angle can be left for single colour)
-> Change printer res. to 300dpi
-> Uncheck all except colour channel
-> PRINT
-> Uncheck all except line (black)
-> PRINT


For a preview:
In Photoshop
In channels -> colours -> cmd+a -> cmd+c
New document -> cmd+v
Select channels -> image -> mode -> bitmap
Output -> 1200
Method -> halftone screen
Frequency -> 20-65
-> Choose shape

Can't print with this method, but will give an overview of what it will look like

This workshop was so useful to me, as halftone is something I've been wanting to learn for a long time, and I know it will be something I will use