You can view an example of this sustainable typeset at: http://www.ecofont.com/assets/
This led me to wonder if you could do the same with paper. Imagine punching little holes into it to save on weight, transport costs and raw material, recycling the little bits of paper.
Whilst we could just print right up to the edge, or use my personal reading horror of smaller fonts, imagine if we over printed our words in red then blue ink. Readers can then use alternate red / blue glasses to read the different words (closing each eye in turn to read the page). This will easily double the text data on each page and has the added benefit of 3D pictures.
I cannot wait to try this out with my next science class handout.
Why stop at just red and blue ink? With holographic imaging we could increase further the text storage limits, students just need to hold the paper at different angles to 'read' off each page of information. Then again we could be really radical and transmit information to our students by sticking holographic microdots onto student foreheads as they walk out of the room. Keep your laser readers and RFID chips handy.
My favourite text data compression and transfer technique uses all the muscles in my left hand to crunch the paper and those of my right arm to transfer the message to a circular storage file in my officer corner. Works a treat all the time.