Process Date: March 2003

In this application, foil chewing gum wrappers were marked for tracking, quality, and inspection purposes using a Synrad 25W CO2 laser and FH-Series marking head equipped with a 125mm focusing lens. The seven-character sans serif stroke font spans a total area of only 330 by 100 mils (a mil is equal to 1/1000 of an inch). Using WinMark Pro’s fast-marking stroke fonts, the mark was generated in a total cycle time of 150 milliseconds at a velocity of 65 inches per second.

   The foil gum wrapper is actually a thin layer (1 mil) of aluminum foil, sandwiched onto a 10 mil thick layer of transparent plastic. The code is marked on the plastic surface and the visual contrast occurs because of the differences in the shadowed indices of refraction between the aluminum foil and plastic layer.


This contrasting code was marked on a foil
chewing gum wrapper using a Synrad 25W laser and FH marking head.