Definition of in session. 1  1 : in the process of meeting formally Congress is in session right now. 2  2 US : conducting classes School will be back in session at the beginning of September.
Mylar Pieces. Circles & Hexagons. Multiple Sizes. Hexagon & Circle Mylar Pieces are heat resistant and made especially for quilters who desire to make perfectly shaped circles and hexagons each time with hand or machine piecing and appliquÃ©. Cut fabric 1/4 larger than Mylar template.
The main difference between them is that thermoset is  irreversible and thermoplastic is reversible. Another difference is  that when thermoset when heated does not go soft â¦ whereas  thermoplastic does.  A thermo-plastic is mechanically bonded and as such will melt  when exposed to heat.