I am using ABS on a heated bed, sheet of window glass on that, clamped down with those springy paper clips, with blue painters tape on that. The tape has a waxy coating on it which I rub off with acetone applied to a cotton cloth. Your first layer is just about the most important thing, so if that moves at all, abort the print! I used to use Kapton tape but it was hard to apply without bubbles, although there is a nice video of dipping that in soapy water first then applying it. The painters tape is easier to handle and replace for me. I think everyone get a different system to work for them. I recommend an infrared temp gauge to see what the bed temperature really is.
Jim
