This is a method of making Printed Circuit Boards called the Peel and Press Method.
Step 1: Printing and Cleaning
Print the board design using a laser printer, on glossy paper. The best type is Staples Photo Basic Gloss. After printing you cut the PCB to the size of the board design. Once you have done that clean PCB with a stainless steel scourer.
Step 2: Ironing
Set iron to the hottest possible setting and turn the steam setting off. Place your board design between iron and the blank PCB that you had cut out. Place iron on board, and push down really hard. Wait for it to cool down. After ironing go over your tracks with an etch resistant pen to fix any possibly damaged tracks. Put under cold water and carefully peel the glossy photo paper off the PCB.
Step 3: Drilling
Drill your holes into the PCB. The component lead thickness will usually be 0.7 mm, so drill using a 0.8mm bit.
Step 4: Ferric Chloride
Place PCB into ferric chloride and wait for the copper around the track you want to totally dissolve. While the board is in the ferric chloride agitate the container. The process can be sped up by putting the ferric chloride container, in a bucket of hot water, to heat up the ferric chloride. After that just rinse your PCB using water to get some of the ferric chloride off. Just in case there is some ferric chloride left, clean the PCB with nail polish remover or acetone.
Step 5: Soldering
Place your components in and solder your components in.