I like Wednesday's Heroes... Uninvisible Ink gets a bit confusing and doesn't roll off the tongue. One root word with two contradictory prefixes.

And if it's an online-only business... a quick explanation on the splash page clues in anyone not in the know... if it's bricks-n-mortar, a poster of an artist-drawn panel of a character explaining the name is kind of cool.

Just my two cents.

Bren R.