Debbie,

Here are a couple past discussions on the topic:

http://engravingetc.org/forum/index.php?webtag=EE&msg=6375.1

http://engravingetc.org/forum/index.php?webtag=EE&msg=6020.1

David "The Stunt Engraver" Lavaneri
DGL Engraving
Port Hueneme, CA