Computer Graphics with Photoshop

Author

swap channels...?

Dave B

2006-05-12, 6:16 pm

I thought I read somewhere once that you can swap a channel. For example,
you make a copy of the yellow channel, delete the black channel, and make
the yellow copy be the black channel (i.e., the yellow copy now prints black
ink). I've done my requisite research and can't seem to come up with an
answer.

thanks!

DB

toby

2006-05-12, 6:16 pm

Dave B wrote:
> I thought I read somewhere once that you can swap a channel. For example,
> you make a copy of the yellow channel, delete the black channel, and make
> the yellow copy be the black channel (i.e., the yellow copy now prints black
> ink). I've done my requisite research and can't seem to come up with an
> answer.

There are several ways of doing this including copy and paste (via a
temporary channel).

>
> thanks!
>
> DB

Dave B

2006-05-13, 3:15 am

"toby" <toby@telegraphics.com.au> wrote in message
news:1147471576.372872.296050@i40g2000cwc.googlegroups.com...[color=darkred]
>
> Dave B wrote:
>
> There are several ways of doing this including copy and paste (via a
> temporary channel).
>

But if I just copy and paste - now I have two yellow channels. How do I take
that channel and make it black (or magenta, or whatever...)? Thanks man...

Mike Chamlee

2006-05-13, 3:15 am

Try this:
"Image/Adjustments/Channel Mixer" from the pulldown menus.

"Dave B" <davegnbNOSPAM@hotmail.com> wrote in message
news:AU29g.1681$Jf.995@newsread4.news.pas.earthlink.net...
>I thought I read somewhere once that you can swap a channel. For example,
>you make a copy of the yellow channel, delete the black channel, and make
>the yellow copy be the black channel (i.e., the yellow copy now prints
>black ink). I've done my requisite research and can't seem to come up with
>an answer.
>
> thanks!
>
> DB
>

toby

2006-05-13, 6:15 pm

Dave B wrote:
> "toby" <toby@telegraphics.com.au> wrote in message
> news:1147471576.372872.296050@i40g2000cwc.googlegroups.com...
>
>
> But if I just copy and paste - now I have two yellow channels. How do I take
> that channel and make it black (or magenta, or whatever...)? Thanks man...

I'm not sure why you'd need to do this. If the idea is to swap the
image between K and Y, copy and paste will do. Obviously I don't
understand your objective as well as I thought.

If you want to arbitrarily assign inks to channels, you'll need to use
Spot Channels.

Other techniques you may wish to experiment with are Split and Merge
Channels.

tacit

2006-05-13, 6:15 pm

In article <9w99g.1711$y4.572@newsread2.news.pas.earthlink.net>,
"Dave B" <davegnbNOSPAM@hotmail.com> wrote:

> But if I just copy and paste - now I have two yellow channels. How do I take
> that channel and make it black (or magenta, or whatever...)? Thanks man...

In the Channels palette, go to the Yellow channel, copy, then go to the
Black channel and paste.

This is the clumsy way to do it, though. The Channel Mixer command is
faster and easier, and offers far more control.

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