Any thoughts on what type of plant tag/label will last the longest without needing re-writing?

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I have seen plastic, zinc, copper, and other aluminum ones. Some are written on, while others require punching or stamping. Some say use a permanent marker, others to use a grease pencil. For a long lasting identification use, will it require stamped metal tags/labels? Thanks for any thoughts and sharing any experience. I am thinking of labels that will last at least 10-15 years on specimen plant material.
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