Copying a Photoshop Color Channel into the Layers Palette

Sometimes I find it necessary to copy a Photoshop color channel into the layers palette.

The standard workflow for this is to select the channel which interests you, ctl-A, ctl-C (on a PC) to select all and copy, then return to the layeres palette, make a new layer, and ctl-V paste.

If you do that, however, your channel will not be color managed. That matters if you plan to reconstruct those channels later as done here in RGB or here in CMY and hope to form an image that matches the original.

The way to use the Black & White Adjustment Layer to derive, say, a green channel, is to set all sliders containing green to 100. (That means the green, cyan, and yellow sliders) Then set all other sliders to 0.

You can save that set of sliders as a preset for convenience later.