Triz Principle # 32 Color changes

Colour can be an aesthetic factor or it can have practical uses, such as signalling danger. It can also be used as a detection mechanism, such as the use of litmus paper to determine acidity levels.

A. Change the color of an object or its external environment.

  • Use safe lights in a photographic darkroom.

B. Change the transparency of an object or its external environment.

  • Use photolithography to change transparent material to a solid mask for semiconductor processing. Similarly, change mask material from transparent to opaque for silk screen processing.