Does anyone know of the existence of a pencil or crayon or other writing utility that is invisible at first and appears after a few minutes. I was thinking about combining this with the Osterlind 'imp pad'. Some one writes/draws something on a piece of paper, put's it in his pocket(or in an envelope with foil as Osterlind describes) you produce their drawing and add something on your own paper, spectator gets their paper out and your drawing is also on their paper!

Sounds like an interesting idea. Anyone else know about this?

Simon.

http://www.themagiccafe.com/forums/viewt......4&26

???

There are chemical ways of doing this, but you must apply heat.

I'm having a friend (chemistry professor) see if there's a way of doing this without using heat.

Part of the strength of a drawing duplication is that it the drawing is never touched by the performer. I'm afraid that having something 'appear' on the paper after it has been drawn on by the spectator may lead them to think that somehow the performer was able to have some kind of access to it. This certainly isn't the direction I'd wish to go.

You probably have a logical reason for wanting an image to appear on the paper - so excuse my comment.

Just a concern.

Kindest Regards,
George Tait

Thanxs for your concern, but after the spectator draws something on the paper, the performer never touches it or comes close to it. They keep it in their pocket at all times.