LIGHTING

Colour mixing:


Colour mixing is adding two or more colours, which are lighting gels, to a single colour to adjust its qualities. There are two types of colour mixing, these are:

• subtractive 
• additive

Subtractive colour mixing is placing two gels in front of the same lantern. This obtains a colour effect which you are unable to attain from regular manufacturers. Combining colours in this way reduces the unwanted darkness of light in various colours. The three primary colours of lighting are: 

• Red
• Green 
• Blue

And these mix subtractively to form black.

Additive colour mixing is when you focus two different coloured beams of light on to the same area. Adding colours this way easily blends the colours together and eventually forms white.

Below is a diagram of the Primary colours and their pigments & How coloured light effect coloured pigments: 

How coloured light effects coloured pigments
	Red pigment	Orange Pigment	Yellow pigment	Green pigment	Blue pigment	Violet pigment
Red Light	Fades and disappears	Becomes lighter	Becomes white	Becomes much darker	Becomes dark grey	Becomes black
Yellow Light	Remains red	Fades slightly	Fades and disappears	Becomes dark grey	Becomes dark grey	Becomes nearly black
Green Light	Becomes much darker	Darkens	Darkens	Becomes pale green	Becomes dark green	Becomes nearly black
Blue Light	Darkens	Becomes much darker	Becomes light mauve	Lightens	Becomes pale blue	Becomes light mauve
Violet Light	Becomes pale red	Lightens	Becomes pink	Becomes pale blue	Darkens	Becomes very pale
Neutral colours (black, brown and greys) remain almost the same under all lights, apart from a slight change in depth of tone or shade.

referencing for image & table: Hsc Online - http://www.hsc.csu.edu.au/entertain/industry/core/lighting/3220/information.htm

.