Over time the silver on the back of antique mirror glass wears thin and flakes off. The wavy irregularity of old glass lends a lovely charm to antique mirrors. Other unique features on old glass mirrors can be intricate etchings, beveling or fancy edge work. The decision to restore can be a tough one to make. Careful thought and planning are important before deciding whether you should restore the antique mirror glass or give the work to a professional.
1 Valuable old clocks can have mirrors.
Assess the value of your mirror. The mirror could be an essential part of the appraised value of your piece. In some cases having the mirror re-silvered by an expert can increase the value. Professional re-silvering rarely brings down the value of an antique mirror
2 Protect your eyes from any shards of glass.
Restore the mirror glass if it is not of any risk to the value of your piece. Carefully remove the glass with a flat-blade knife or screwdriver from the frame. Wear protective eye gear and gloves.
3 Look carefully at the back of the mirror to decide how you want to proceed.
Study the back of the mirror after it is removed. It could be a larger job than you want to take on.
Notice that hand mirrors are filled with pitch before the mirror is put in. The pitch often breaks up into lumps. Remove all of the pitch and save it.
Scrape off all the old silver and clean the back. Wear a dust mask; old mirrors contain mercury.
4 Slow, steady heat will dissolve the gelatin.
Re-create the back of your mirror. Prepare sizing that is needed for the silver to adhere to the glass. Slowly heat one cup of distilled water and one teaspoon of unflavored gelatin granules. Stir with a 1-inch paintbrush until the gelatin dissolves. Keep the solution over a low heat while you work with the silver.
5 Brush the tip of the gilder's brush to your hair to create static electricity.
Use the 1-inch paintbrush to apply a 3" area of sizing to the clean, dry surface of the glass. Generate static electricity to the tip of the gilder's brush. Never touch the silver leaf with your hands or get it wet. It is very delicate and will dissolve. Hold the silver-leaf booklet at a downward angle and touch the gilder's brush to the edge of the silver-leaf sheet. Slide the silver-leaf sheet about an inch over the booklet's edge.
6 One thousand stacked silver leaf sheets equal the thickness of a nickel.
Touch the edge of the silver leaf to the moist sizing on the glass while quickly moving your hand away from the glass. The silver leaf will slide off and adhere to the glass.
Cover the entire glass, laying the silver leaf in rows. Overlap the squares about 1/8". Let the mirror dry for about an hour.
7 Restored to its original appearance.
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