You and your new copper sink (bath or kitchen).
Your copper sink has a living finish meaning it is alive and will continually change. It is not a static finish and it NOT look the same from week to week or even day by day. If this is something you cannot handle, then perhaps a copper sink is not for you. Following is a guide for caring for your new sink.
Copper Care Guide:
Copper has a living surface so it will continually lighten and darken in time creating the beautiful rich patina you see now. Reason it does this is to protect itself from chemicals, anything acidic, or any other harsh elements. This natural process is what gives copper its anti-bacterial and anti-microbial properties. If you wipe a sink down with a soft cloth you will commonly see a bit of brown/patina come off on the cloth, this is normal. In addition, if anything acidic or chemical based is allowed to sit on the sink surface, the patina will be stripped and expose the raw copper. The copper will then do what it does best and start to protect itself or re-patina itself until it eventually reaches its equilibrium and matches the rest of the sink. How do you speed up this process? The more water and oxygen come into contact with the raw spot, the faster it will patina. Copper is constantly trying to stay at its equilibrium and will absolutely not stay in its raw state.
COPPER CARE AND CLEANING INSTRUCTIONS
DAILY
When you finish using your sink, adopt the simple method of “RINSE and WIPE”. When water dries, it often leaves behind unsightly calcium stains, which may alter the appearance in an undesirable way. In addition, when food is allowed to sit on the surface of the sink, any acids within the food can alter the finish. So just remember to rinse with water and wipe with a dish towel. NOTE: Since copper is a natural anti-bacterial surface, it is not necessary to disinfect or scrub your copper, it does it for you!
WHEN NEEDED
If you feel the surface has lost its luster, use a clear mild non-citrus liquid dish soap with a no-scratch sponge to gently scrub the entire surface. Rinse with water and wipe with a dish towel. NOTE: you may notice some brown spots on your sponge when you do this. Do not worry, it is perfectly normal. You are scrubbing off some of the patina that has built up over time.
To further enhance the beauty of the finish and add an extra layer of protection from food related acids, this is a good time to use Premier Copper Surface Protectant Bees Wax Spray (Model: W900-WAX). Simply spray and wipe with a soft cloth.
AVOID
All cleaning products that contain abrasives, ammonia, bleach, and alcohol. All will strip the patina and expose the raw copper.
CARING FOR LIGHT SPOTS
If something strips the patina, do not worry, your copper surface has a living finish. The patina will naturally regenerate with time. The best thing to do is clean the area with clear mild soap and no-scratch sponge to remove any remaining acid or chemical. Do not wax the sink until the spots have darkened back with natural patina. The more water and oxygen that come in contact with the raw spots, the faster they will patina. Waxing will slow the natural darkening process as it protects the surface from the environment. Use your sink as you normally would and you will notice the spots will darken and blend back into the sink.