"laser holes"? Do you mean laser etchings? The images you posted seem more like the lasers created some type of etching or mark on the note. Very interesting...
Yes- the first sentence states that the notes have been "laser marked" and the last sentence: "If you need a few more notes for your coating and filling tests please let me know" - It does seem logical that the "coating" and "filling" may refer to some kind of varnish testing.
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