The traditional method of making mirrors involves chemicals, such as silver nitrate and ammonia, that need to be carefully mixed. If you can't get a hold of these chemicals, or you just don't want to go through the trouble of mixing and heating them up, there is a much simpler way to make a homemade mirror. You can make a mirror out of any size as long as you have the glass and the tools needed for this project.
Clean off a smooth table top and lay the sheet of glass down on it. Measure the corner of the glass with a ruler, and use a dry erase marker to mark where you will be cutting if you are making smaller mirror. For a purse-sized mirror, measure and trace a 3 inch by 3 inch piece on the corner. Rub off any visible dry erase marks.
Score the glass with a glass cutter. Hold the glass cutter down firmly and drag the blade away from you. Make sure you can cut the glass in one cut so that you won't get uneven lines or scratches in your glass. Remove the rest of the glass.
Put some newspaper down outside or in a well-ventilated area, and put on a face mask. Cover one side of the cut glass with masking tape, and make sure the edges are sealed. Place the glass on the newspaper tape-side-down. Shake up your chrome spray paint or special metallic paint that is used for making mirrored surfaces, and spray it evenly on the glass. Wait for the first coat to dry.
Spray on a second and third coat after each coat has dried. After the third coat has dried, remove the tape from the other side and clean it with some glass cleaner and a paper towel to remove any smudges or streaks.
Cover the edges of the glass with black tape, which will also frame the mirror. You can also use foil tape or colored tape if you want a different color. Now you have a homemade mirror that you can carry around with you.
Make many smaller mirrors and give them out as gifts.