32 Color changes

Change the color of an object or its external environment.
  • Use safe lights in a photographic darkroom.

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.
TRIZ principe 32


Is this principle frequently used?

This principle is moderately used with 147 instances in the matrix.

This principle is proposed to solve the following contradictions:

Click on a contradiction to explore it

1/18 1/37 2/17 2/18 2/33 3/18 3/28 4/28 4/29 5/18 5/19 5/21 5/28 5/29 6/21 6/27 6/28 8/25 9/28 9/29 9/33 12/17 12/18 12/28 12/29 12/32 12/33 12/38 13/17 13/18 13/21 13/26 13/33 14/32 14/33 14/35 17/2 17/12 17/13 17/18 17/28 18/1 18/2 18/3 18/5 18/12 18/13 18/17 18/19 18/20 18/21 18/28 18/29 18/31 18/36 18/37 19/28 19/38 20/18 21/6 21/13 21/28 21/29 22/18 22/25 22/28 22/33 23/2 23/33 24/9 24/25 24/32 25/8 25/22 25/24 25/28 25/34 25/37 26/34 27/6 27/18 27/28 27/29 28/1 28/4 28/5 28/6 28/7 28/9 28/10 28/11 28/12 28/13 28/14 28/15 28/18 28/19 28/21 28/22 28/25 28/26 28/34 28/37 28/39 29/1 29/4 29/5 29/7 29/9 29/12 29/18 29/19 29/21 29/22 29/25 29/26 29/27 29/33 29/39 30/18 31/18 32/14 32/24 33/11 33/13 33/14 33/23 33/29 33/34 33/36 34/5 34/21 34/22 34/25 34/39 35/14 35/30 36/29 37/11 37/25 37/28 38/12 38/18 38/19 38/27 39/29 39/34


The colour indicates the ranking of the proposed principle to solve the contradiction: 1st, 2nd, 3rd, 4th.
This ranking reflects the frequency of occurrence of the principle in the analysed patents for this type of contradiction.
When a principle appears in first position, it means that it is statistically the most used in the patents studied for this type of problem.