I looking for a supplier of a alkaline soluble surfacing tape for blocking.

I have a ultraconic cleaning unit, where the alloy is automatic melt, and in the next step the film is remove from the lens.
The tape that i have used bevor is no more availble:
(http://www.tool-shop-optic.de/schutzfolie_eng.htm)

so i am looking for alternatives, have you any suggestions.

In the moment i use the 3M Tape, wich is good, but i need more man power on the ultraconis unit...