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Frequently Asked Questions

What color and hardness of crayons should be used?

The GMR recognizes ten colors simultaneously, and even more if they are chosen carefully. Three groups of five different colors are recommended for multiple shift operations. The crayon hardness required depends largely upon ambient mill temperatures and wood surface conditions.  For example, harder crayons are used in warmer weather.  Lucidyne has installed over 650 GMRs world-wide and will be glad to recommend crayon colors and hardness prior to installation.

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Lucidyne Technologies, Inc.

  • 155 SW Madison Ave
    Corvallis, OR 97333
  • Phone: (541) 753-5111
  • Fax: (541) 754-0545
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