Posted By:
David AtkatzI quote from Lyter's webpage:
"Normally these samples are removed with a hypodermic needle sized hole punch and do not effect the legibility of the material. The hole punch is approximately the size of a typewriter period and a full range of tests require about 30. In a normal sized signature there is over 4 inches of written line and 30 "microplugs" is approximately 5/8 inch. Because the samples are normally taken from the entire area of writing the legibility of the writing and the ability to perform additional tests is maintained"
He removes about 15% of the signature. Not exactly un-noticible.
And for what?
He can only judge when the ink was put down by comparison with another sample, of the same materials, whose dating is known. So, at best, he can determine if writing has been added to an existing document. Important in determining the legality of various contracts, wills, codicils, etc., but not very useful in the autograph field.