1. Colour Technology

2. Why use Colours? Identification Branding Convey a Mood or a Style Choice

5. Human Visual System

7. The Rods and Cones

8. The Rods and Cones 5 million per eye (more L and M cones than S cones) 100 million per eye Responsible for daylight (photopic) vision Responsible for low- level (scotopic) vision Cone function Rod function scotopic mesopic photopic luminance Cones Rods

17. Colour

19. Colour Space + L = Lightness - L* = Darkness + a* = Redness - a* = Greeness + b* = Yellowness - b* = Blueness +a* +b* -a* -b* L*=100 L*=0 L* L* -a* +a* -b* +b*

20. Colour Space - Delta E a* b*  C*  H* is the difference between two points in colour space, often use to determine a colour tolerance or specification. S C S H

38. A Polymer for Every Application