My suggestion:  If you deceide to try a marking system, be sure to consider a
system that allows you to load a stack of cassettes at a time instead of doing
one at a time.  Doing one cassette at time will eventually net you a tennis
elbow. I have been looking for pens for marking on the occasional cassette.  I
have found the Pigma Pen works well, however the only distributer I know of is
StatLab Medical Products and since we are in Florida we have a problem ordering
from them. Maybe someone can tell us who else supplies them. Good luck.
Mequita Praet
Dermatology Associates
Boca Raton, Fl
WeissHouse@aol.com wrote:

> i have been hearing about cassette numbers washing off lately.  anyone else
> having this problem?  what pen is being used by the majority of histonet
> users? it seems that the cassettes from sakura are smoother than usual, any
> response ? looking into marking systems. any suggestions?  are any of you
> histonetters having this problem and what do you attribute to it ?