Software Workshop - Photoshop

Scanning in hand rendered images - 

View - Gamut warning - shows up the unprintable colours such as RGB colour range. (usually bright, florescent, saturated colours.

Image - adjust hue/saturation/brightness/contrast

Select 'grey' area- wand tool
or
Select - colour range- click on what colours you want to select - fuzziness expands the range of pixels you are selecting
Shift click - selects more
Click ok… then you have your selection.
You can then adjust settings, for example hut/saturation
Colour Range - select: out of gamut colours - that will select all of the unprintable colours.

Adjustment Layer-
at the bottom of your layers palette there is a option at the bottom - half back/white circle
This new layer contains the adjustment.
This means that the adjustments can always change- not fixed

Layer Masks
If you make an adjustment layer while stuff is selected it will just affect the selected (white) parts.

Image - Adjustments - Replace Colour - select colour
Then if gamut warning is turned on, you can adjust hues etc
You can also use this effect if you just generally want to try to replace colours with difference ones.

File - revert change it back.

View - Proof Colours - ( command and Y) - On the image tab it will say (RGB/8/CMYK - for example)
Proof Colours - All colours as they appear on screen will still print.
RGB - photoshops default mode - Wont print some colours
Always work with proof colours turned on! OR just check with 'Command Y'

Work in RGB - Gamut Warning - Just before you save it convert to CMYK 
300dpi - CYMK - resolution for print 

Flatten the file if necessary and send CMYK file to professional printer etc.

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RGB Mode - How do you apply colour??

Colour - Swatches Palette - Get the colour exactly right every time you use it - Gives you consistency!
Or if you're working with a limited colour palette.
Swatch palette- Clear it out and then just have the colours you're actually working with!
Hold down alt and click on colour - removes the presets from your swatch palette

D restores background and foreground colours to black and white.
Just click on the swatch bar to add the foreground colour

On swatch palette options top right - Presets - Save swatch - Colour Swatches 

Reset Swatches - can replace with default colours.
Replace Swatches - replace with your previously made colour schemes.

When Picking colour from foreground colour picker - on the right hand side of variation of colours there will be a triangle with exclamation mark if the colour may not print! - If you click on the square/exclamation it will go to the nearest printable colour. 

Underneath the triangle - cube thing - will take you to the nearest web safe colour.

Can add to swatches from here.

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• 300ppi (or dpi)
• CMYK
• Actual size!
• File format Client will specify- jpeg. (will loose some image quality so save it just once as jpeg just before you send it) - While working use - .tif or .psp (if you have to send something online tif may work).

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Commercial print -

•  Offset Lithography- traditional printing (CMYK printing)

CMYK mode- 

• Is used to define colour as it is when created during the printing process. 
• Sometimes referred to as Process Colour. 
• K stands for Key colour (black/centre)
• CMY - colour processing with photographic printing it is possible to get a full colour image.
• But using ink - the image lacks detail- to do with the property of the ink. There is no strength in the muddy brown shadows. The black key colour keys together the CMY.

See Colour on screen in terms of ink - 

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Window - Channels - a way that information about the colour in the image is stored. 

Can view each colour individual through channels - although each one is a black and white image - this is how photoshop stores information about the amount of red in the image. 

This is how we go from a digital file to a printed document.