I am thinking Fred Goss. Thirty pounds of clothes being cleaned in INK!
Excellent guess, Mayor but sorry, incorrect.
Maybe it's the one when the Darlings were trying to set up reluctant Opie with a baby girl as his future bride to be and Andy saves him by having him sign the contract in trick-ink that disappears and that spooks the Darlings and they high tail it outta there and forget the whole deal.
Hint: Johnny Paul Jason.
Johnny Paul Jason said if you lick an indelible pencil you will die in a minute and a half. And also a couple little known facts of life are chewing tar s good for the teeth and eating burnt food will give you a good singin voice. I found that stuff on Andy and Opie, Bachelors.