LP necklace. Warping vinyl

 

 I am currently working on a necklace made of silver and vinyl domes and began by piercing out flat vinyl disks and slumping them into silver domes in the oven. 

  I encountered an unexpected problem in that the vinyl disks, when heated/slumped, warp or stretch in the direction in which the lines or grooves run, hence warping the circles into ovals. I have had to make the disks too big and cut them down to size as circles afterwards.