Solaris lp printer filters

I don't have much experience with solaris printers.

I've created a printer using lpadmin. When I tried to print something, I got a message that there a no filters on the server.

I went to docs.sun.com and got a script to add a filter (below)

for filter in *.fd;do
>name=`basename $filter .fd`
>lpfilter -f $name -F $filter
>done

I did run the script, and now when I print something, it has a black border on the page.

How do I list all the filters on my server?

How do I "undo" the above script?

man lpfilter

look at the -f, -l and -x options.