If you look at the sink in the photo, you will see our most common sink construction method. A "belt" of copper starts on the left side, bends down to the bottom and bends up to the right side. This belt is attached to a front and back panel with a large mechanical (one piece tucks into the other) which is soldered to be water tight. Thus, the front and back panels do not have a radius - just the left and the right.
As you can see from this sink, the finish is unique and some may call it spotted. These spots are always changing depending on the use. If you set a pan in the sink overnight, the water that clings between the pan and the sink are likely to cause a reaction with the copper and you may see a ring the next day. Likewise, any acidic foods - lemons and tomato-based foods are common - will also leave a mark on copper, zinc or brass. If this living finish is not attractive to your design, please consider a different material. We warranty our craftsmanship, but we cannot control the finish.
Sinks can be made in copper, brass or zinc, but there are some properties to know as you consider which sink is right for you. Copper is a warm color and is softer than steel. The seams that were mentioned above provide rigidity to create a long lasting shape.
Zinc is softer than copper and still reacts in a similar way. With a base color of gray, zinc will turn black and even white depending on the minerals in your water. We use 0.040" thick zinc on most sinks and 0.060" thick zinc on larger ones. Since zinc is soft, it is best if the bottom is not under a lot of stress so additional support for garbage disposals is desirable. If you are looking for a silver sink to go with a zinc countertop, our first recommendation is a stainless steel sink as you will get better performance from that material. If you are looking for something unique or a custom size, we are happy to make it in zinc.
Brass, conversely, is stronger and stiffer than copper which is surprising since it is an alloy of copper and zinc. Brass is a great material for a sink and can also match with many brass fixtures, drains and other kitchen hardware. Brass begins as a golden color and ages toward brown to look similar to "oil rubbed bronze" which is a common color in kitchen hardware.
The sink in the photograph is a surface mount sink. They can also be made to be undermount or integrated into a copper, zinc or brass countertops.