Some time ago, we had long discussions about Pap pens, pros and cons.  

There is a new one out, it can be seen on the slide, without red and blue
dye in the pen (which leached out in solvents during dehydration).  It is
called the Super Pap Pen, and believe me, it lives up to its name.  

Can use it on acetone fixed frozen sections, mounted on plus charge slides,
with the marking put on before going to buffers.  It is visible as a
greyish line, and stays on throughout the whole staining procedure.  Take
care though, it really dispenses with a bit more speed.  The cat # is K-680
tissue capture pen

Kiyota International, order 800-718-6770 and hopefully our other vendors,
like Newcomer Supply and whoever else sells pap pens will be supplying
these.  

I have been very happy with my application, and not a saleperson, just a
satisfied customer who would like to pass on some good info about a nice
product.

Gayle Callis


Gayle Callis
Veterinary Molecular Biology
Montana State University
Bozeman MT 59717-3610
406 994-4705
406 994-4303