Debbie, try Redisharp Plus Black Ultra-Fine Markers # 98307 from Dixon
Ticonderoga. The company is using another name which escapes me at the moment
but their phone number is 1-800-592-6940. They are the best I've found and
we use them exclusively for both blocks and slides. They are MUCH cheaper than
Securline, too.
Hope this helps.
Noreen S. Gilman, HT (ASCP) CLS
Supervisor Histopathology
Broward
General Medical Center
Ft. Lauderdale, FL 3316
954-355-5592
Phone
954-355-4139 Fax
ngilman@nbhd.org