OUGD504 - Studio Brief 1 - Creative Suite Workshop 2 - Photoshop

Every image in Photoshop has a mode. In the Image menu you can see what mode it is in and it can also be changed from there too. RGB and CMYK are the main ones we use.

The default format for an image in Photoshop is RGB.

When the colour mode of an image is changed from RGB to CMYK, the colours normally shift as not all colours in RGB can be recreated in CMYK.

To make an RGB image into a printable format, you go to the gamut warning selection and then either change the image's settings to end up in the CMYK spectrum, or change the mode to CMYK.

Another option is to use the proof colours selection as this lets you work in RGB but shows you what it'd look like in CMYK to give you an accurate visual of what it would look like printed.

To add colour we use the colour picker.

When using the colour picker, if a exclamation mark shows, it means that it is not in the CMYK spectrum, if you click the mark, it will jump to the closes CMYk derivative.

All spot colour pantone colours are available in the colour library section.

Spot colours need to be identifiable by their unique reference numbers so the printer can mix the ink.

To create duotone images the image must be greyscale.

Channels:

In CMYK:

To create spot colours in a greyscale or CMYK:

The solidity simulates the opacity of the ink used in the printing process.

This can be saved as a psd or a tiff file. The spot colour selection box must be checked.