http://www.forrestrace.com/glass-frit/

what’s slurry method for preparation of glass frit?
The slurry method is just the pulverizing of the glass frit to a powdery consistency and mixing it with water until it is a thick paste. The paste is applied to a ceramic or other substate and then is fired in a kiln or with a torch
How to Blow Glass : Adding Glass Frit to Gather for Glassblowing