How To Blow an Unpoppable CD Bubble

Bubbles from Ordinary CDs

Because it's plastic, the bubble formed from a CD is virtually unpoppable.
Because it's plastic, the bubble formed from a CD is virtually unpoppable. You can make the bubble small like this or blow a giant polymer bubble. Anne Helmenstine

Ready for some fun with the old CDs you have sitting around the house? You can make giant unpoppable bubbles from them.

CD Bubble Materials

  • CD (blank, used, audio, digital... makes no difference)
  • lighter
  • knife or any hard edge

Procedure

  1. Use a blade or fingernail to scrape away the metal film on the labelled side of the CD. You don't need to scrape the top of the entire CD -- just a couple of centimeters.
  2. Apply a flame to the cleared area. It doesn't matter which side of the CD you heat.
  3. Continue heating the plastic until it starts to look shiny, like a puddle.
  4. Blow forcefully into the molten area to form a bubble. Don't touch the hot area with your lips or fingers! Depending on how well you liquefied the plastic and how hard you blew, you'll either get a small rounded bubble, a giant bubble extending several feet, or somewhere in between.