Also, they are often seen used in tattoo parlours before applying the actual permanent ink.

If you want your hand written words of wisdom saved for posterity use quality paper and permanent ink.

I've written them on my mental calendar in permanent ink.

Mustard and permanent ink are the hardest stains to remove, but not impossible.

An option is to make and laminate a permanent ink duplicate of the image.

Always choose a permanent ink rather than buying the cheapest you can find.

In some kind of permanent ink that fluoresces.

Entries are made with black, permanent ink.

You remind yourself of the ways you've changed and the permanent ink means you can never change back.

There are different permanent inks and I know they can remove some of them for I had an incident just recently myself.