I looked at the "marcorubber.com" website for rubber cord, but
where is it displayed? I am interested in buying some for
necklaces based on previous quotes stating that their customers
have not complained about it leaving marks. Please advise!
Go to O-ring cord and try the Buna-N type. I have sold many
necklaces and bracelets using this type and have not had one returned
due to black residue. This includes the men's market. The high acid
content in a man's body is the greatest test. It will quickly
tarnish a sterling chain, but doesn't seem to affect the Buna-N
rubber. Good luck.