PEI build surface
PEI is a reusable maintenance free build surface for both ABS (hot) and PLA (hot or cold). Also known as Ultem.
See http://kuehlingkuehling.de/2013/04/02/development-roundup-metal-hotends-new-print-surface-rjmp-linear-bearings-watercooling/ Suppliers: http://www.amazonsupply.com/dp/B00CPRDDLY
Usage:
Laminate 0.030" or 0.040" thick PEI onto glass or mirror tile with 3M 468MP adhesive tape.