Ep 2. Compact Discs, Mozzarella Cheese, Pantyhose, Fluorescent Tubes

How It's Made season 1 episode 2 explores the manufacturing processes behind some everyday items: compact discs, mozzarella cheese, pantyhose, and fluorescent tubes.

Firstly, the episode delves into the production of compact discs. Viewers are taken to a CD pressing plant where they witness the various steps involved in manufacturing the discs. The process starts with a glass master being created – a glass disc featuring the CD's audio data. This is then used to create a stamper, which is inserted into a CD press. The press molds the polycarbonate material into the shape of the disc and imprints the audio data onto the surface. The disc is then coated in reflective material and finally encased in a protective layer of lacquer.

The show then moves on to the production of mozzarella cheese. Viewers are taken to a cheese factory where they learn about the different types of milk used and how the cheese is made using rennet. The curds are separated from the whey and then stretched and molded into the familiar ball shape. After this, the cheese is plunged into brine to increase its shelf life.

Next up is pantyhose. The episode covers the various materials used in pantyhose, such as nylon and spandex, and the knitting process used to create them. It's fascinating to see how the machines can produce intricately patterned pantyhose using a single thread.

Finally, the episode explores fluorescent tubes – a common lighting solution in commercial and industrial settings. The manufacturing process involves creating a glass tube and filling it with a small amount of mercury vapor and an inert gas. The tube is then sealed and coated with fluorescent powder. When electricity is supplied, it causes the mercury vapor to release ultraviolet light, which in turn causes the fluorescent powder to emit visible light.

Overall, How It's Made season 1 episode 2 is an educational and absorbing look into the manufacturing processes of some everyday items. Viewers are sure to gain a newfound appreciation for the intricacies involved in creating the objects we use in our daily lives.