04816374 is referenced by 26 patents and cites 9 patents.

An opacifier substance is added to a plastic material which is naturally transparent to laser radiation. The opacifier substance is added in powder form as a concentration of 2% to 6% by weight of the plastic material. The opacifier substance is preferably antimony oxide and the resulting plastic material is capable of being permanently marked by a laser beam and is suitable for providing animal ear tags. These tags may be marked with an automatically readable bar code and this code continues to be automatically readable over a period of several years use on the animal.

Title
Method of making a plastic material sensitive to laser radiation and enabling it to be marked by a laser, and articles obtained thereby
Application Number
6/849776
Publication Number
4816374
Application Date
April 9, 1986
Publication Date
March 28, 1989
Inventor
Gilbert Lecomte
Rives-sur-Fure
FR
Agent
Griffin Branigan & Butler
Assignee
Societe d Applications Plastiques Rhone Alpes
FR
IPC
A01K 11/00
C08K 3/00
B41M 5/24
G03C 1/72
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