Compact disc manufacturing

Okay, so you know how you sometimes watch movies or listen to music on CDs? Well, those CDs are made in a special factory called a manufacturing plant.

First, there is a machine that makes a tiny mold called a stamper. The stamper is like a cookie cutter that cuts out the shape of a CD and puts little bumps and grooves on it.

Then, a machine puts a special type of plastic called polycarbonate in between two stampers. The stampers squish the plastic together and make a perfect copy of the bumps and grooves.

Next, a thin layer of metal, usually aluminum, is put on top of the plastic to make the bumps and grooves easier to read.

Now, the CD is almost done! But first, a machine checks to make sure the CD is perfect and has no errors.

Finally, the CD is printed with the cover art and packaged up to be sent to stores or directly to your house. And that's how a CD is made!