You could also get nicely printed (engraved I think) log paper (in a number of different scale configurations) for much longer. Also from K&E. Like printed Sm

You could also get nicely printed (engraved I think) log paper (in a number of different scale configurations) for much longer. Also from K&E. Like printed Smith charts, though, it has gone the way of the dodo - people that need one just print out a pdf.