b'LUMBER &TIMBER MARKERSWhether marking raw materials in the field or in plant for processing, Markal has a marker engineered for use on almost any wood surface and for use with grade mark readers. For marking logs, boards, or raw lumber, our lumber crayons are an economical and effective way to mark wet, dry, rough, and dirty wood for improved processing and tracking. For use with grade mark readers, our scanning crayons have been engineered with exceptional color and vibrancy to reduce misreads and improve efficiency.'