How It Works

Introduction

The human eye sees color by combining the following:

  • Light -> Dark
  • Red -> Green
  • Blue -> Yellow

The human eye can see in excess of 10 million shades of color. How that color is communicated and perceived depends on several factors.


Automotive Painting

Once a particular color code (C-Code or Hunter Code) is selected for use in painting there are a number of factors that will impact how that painting is perceived once completed. This includes:

  • The conditions in the painting booth (humidity, temperature, etc)
  • Number of layers used
  • Method for painting
  • The clear coat or consistency of paint
  • The material that is being painted

Painting on Different Materials
  • The current standard for selecting colors andĀ  subsequently painting for automotive uses is cardboard spray out cards. This method, although inexpensive and persistent, has a critical fault
  • Cardboard spray out cardsĀ do not represent metallic colors the same way plastics or sheet metal due to various static charges
  • There is a (often clear) difference between the two materials when painted. It is this reason that it is sometimes difficult to color match and paint a plastic bumper after repair

Scientific Analysis

There are three primary values that represent the C-Code or Hunter Color code when processing color

  • L value for Lightness (0 black – 100 white)
  • value (+for red, – for green)
  • value (+for yellow, – for blue)

A spectorcolorimeter was used (Certified ASTM E308 calibrated device tested by Arizona Desert Testing)



Summary
  • Plastic Spray out cards offer superior color representation when compared to cardboard spray out cards
  • Reduction in labor hours and material due to repainting
  • Increase in customer satisfaction
  • Replacement cost is nearly equivalent to current standard cardboard spray out cards