Digital Positives for UV exposure using Image-on

[ainesse]

I have lost my notes for carrying out this procedure i.e., outputting digital positives onto an unkjet OHT or transparency, for the purpose of UV exposure using Image-on, onto a copper plate.

Two house moves this past year - so it kind of had to happen with something or other!


I seem to remember that (using Photoshop) I saved it in gray scale then did something like saved it as a halftone. There was something to do with bit map and then dither and well

I can't remember the order of things or the angles for the dots.??

PLEASE IS ANYONE ON HERE ABLE TO OFFER ANY ADVICE.

hope you can help

best wishes

Aine
http://ainescannell.blogspot.com

 

[mkochsch]

First convert to greyscale and then convert it to "Bitmap". During the conversion to bitmap you will be given the option of either creating a halftone or using dither diffusion. Standard angle for the halftone dots is 45 degrees. I would experiment with your output to try and get as fine a dot pattern as possible (i.e. 133 or over). Dither diffusion is the other way to go. I'm currently experimenting using dot patterns between 300 and 700 lines per inch.
~m

I have lost my notes for carrying out this procedure i.e., outputting digital positives onto an unkjet OHT or transparency, for the purpose of UV exposure using Image-on, onto a copper plate.

Two house moves this past year - so it kind of had to happen with something or other!


I seem to remember that (using Photoshop) I saved it in gray scale then did something like saved it as a halftone. There was something to do with bit map and then dither and well

I can't remember the order of things or the angles for the dots.??

PLEASE IS ANYONE ON HERE ABLE TO OFFER ANY ADVICE.

hope you can help

best wishes

Aine
http://ainescannell.blogspot.com