Drying The Fingers

In many instances it will be found that the outer skin is gone and the

fingers themselves are saturated with water. A quick method of drying

out the fingers is to place them in full strength acetone for

approximately 30 minutes. The fingers are then placed in xylene for

about an hour or until the xylene has overcome the reaction of the

acetone. After removal from the xylene the fingers should be placed on

a blotter until the surface of the fingers appears dry. They are then

ready to be inked and printed.

It will be noted in this procedure that when the fingers are removed

from the acetone they dry and harden in a matter of seconds. The

purpose of the xylene is to resoften the fingers. After this

treatment, should the resulting inked impressions be unsuitable for

classification purposes, the ridge detail should be photographed.