After some trial and error work, I came up with templates that work fairly well.
I then set the default on my label printer to Black&White (no grays), lowest brightness and highest contrast.
The result is very easy to produce labels for my roasts.
If anyone has the same printer, I can post the templates (I made them 1.3, 1.5 and 1.7 inches long (using the 2 3/7 inch wise continuous length labels). I found that I've only been using the 1.3 inch version.