There have been a number of responses to the question about filing
string. Several have used the term 'thrumming' while others use the
term 'trumming' .'
To be honest, I have always thought it was 'thrum'....however, after
due diligence I find the correct term is 'trum' as used by Nanz.
A check of anvilfire.com provides the following: trumming or trumming
cord Jeweler's term. A method of using a cord charged with abrasives
to cut, grind or polish. A trumming cord is made of any size string
or cord with something tacky to hold the abrasive which is then
applied as dust. Braided cords are prefered because they do not
unravel. Abrasive can also be applied directly from stick buffing and
polishing compounds which are already in a was matrix. The ancients
used a similar process using rope or cord to cut stone. The modern
method uses wire.
Commercial abrasisive cord is manufactured similar to abrasive cloth
Ah hah and cheers from Don at The Charles Belle Studio in SOFL where
simple elegance IS fine jewelry!