Ok, let's add to this conversation. Now the wife wants to get fancy with the text.
How thin of a line could I get away with on a 155 mesh?
That would depend on your emulsion, coating technique, and exposure unit, but 1 point should be pretty easy, and 1/2 point not unreasonable.
When you coat properly, with good
EOM (emulsion over mesh), the actual mesh itself has less effect on the overall stencil.