Design for PRINT workshop - Photoshop

RGB - Red, green and blue. Usually on screen colour. Created when you mix the red, green and blue light. Additive colour process. 

RGB is the default colour mode on Photoshop. RGB has a broader spectrum of colour available. The range of colour is greater then the colour gamut of CMYK

RGB mode

CMYK mode

Here is the image that were working with in RGB mode.

This is gamut warning. Everything that is grey will not print as seen in RGB mode on screen.

Here I am adjusting the saturation to get the best print that is as vivid as it can be. Abetter way to do this is to only de saturate areas that cant be printed in CMYK. Only select those area to desaturate. 

Proof colours is displaying the image in CMYK in RGB. Basically proofing how the image will look like if you printed it without any adjustments.

If you adjust the colours in proof mode it will only adjust the image to what is still printable.  

Before exporting or saving the image, you have to convert the image to CMYK.

Swatches

We deleted our orginaly default swatches. To reset foreground and background colour press D on the keyboard which will reset them to black and white.

Like Illustrator we have saved the swatches again

The little square with the cube over the top of it is CMYK colour. If you click it it will select the closest printable colour to your colour choice. The cube is for web safe colour.