Ok. They're basically invisible Post-it notes. They have a sensor so that ink turns them invisible, but the writing stays. This way you won't have any ugly yellow notes posted all over, and you can make the notes overlap...-- Hankosha, May 06 2003 Widely Baked electronically http://www.stanford...storm/postboard.txtOne of many implementations. (It's somewhere on the page - keep looking.) [DrCurry, Oct 17 2004] Sheer Post-it Notes http://products3.3m...Handler/output_html3/4 baked by 3M... [dbsousa, Oct 17 2004] Magic post-its, eh? [Marked For Invisibility]-- pluterday, May 06 2003 Not inherently impossible if we substitute "transparent" for "invisible" - 3M makes both Scotch Magic tape and Post-It notes, so they might well listen to you.
Trying to figure out why you want invisible ink too.-- DrCurry, May 06 2003 The ink doesn't turn invisble, the ink being put onto the note makes the note invisible.-- Hankosha, May 06 2003 will one little dot of ink do it?-- po, May 06 2003 Why not start with it clear? (Like Scotch/Sellotape.) A whole lot easier to manufacture.-- DrCurry, May 06 2003 But it wouldn't be nearly as cool.-- -alx, May 06 2003 Ink that turns paper invisible? Uh uh, no way. I call "bullshit."-- snarfyguy, May 06 2003 If invisibility were a possibility, I think Post-it notes would be low on the list of priorities...-- mahatma, May 06 2003 [mahatma] has hit the nail on the head. the point of notes is to see them. the reason they are bright colors is to *improve* visibility. with no background, the black or blue ink on your note would blend in to the clutter on your desk and you'd never see what you wrote.-- urbanmatador, May 06 2003 random, halfbakery