Homebrew PCBs

I got some polyimide tape from ebay and noted that it was tagged KOPTAN 
on a label on the tape.
Noting the 3M name is KAPTON
The EBAY tape is      $2.59 per 100 foot roll.
The MOUSER price is $64   a roll.

It worked fine for me... held parchment paper to an 8x11 paper in the 
laser printer without melting.

http://www.learnmorsecode.com/amp/tl431VU2PPP04.jpg
http://www.learnmorsecode.com/laminator/tonert1.jpg

5/10/20/mm 100ft 33M Heat Resistant High Temperature Polyimide Kapton 
Tape BGA
http://www.ebay.com/itm/272492181801