Prized by professional chefs and home cooks alike, the 10-Piece Tri-Ply Copper Cookware Set from Viking serves up superior performance paired with a beautiful, real copper exterior finish. Unlike cookware sets that are painted with a copper color exterior, the Viking 10-Piece 3-Ply Hammered Copper Cookware set is made from real copper. Because of this, your cookware set will naturally develop a rich patina over time as well as show color variations caused by heat (especially excessive heat) and marks from fingerprints. These natural and normal cosmetic changes to the copper will not affect the cooking performance. If you want the cookware to look new over time, frequently clean the cookware with a copper polish such as PennyBrite by EZ Brite or with a natural mixture of lemon and salt. Due to its high thermal conductivity of copper, you’ll achieve perfectly uniform heating and exceptional temperature control. Your copper cookware will not only heat up quickly, but it cools quickly as well, making it the perfect companion for cooks seeking precision in their cooking. That's why professional chefs prize copper cookware to handle even the most delicate of tasks. When it comes to cooking with copper cookware, keep your heat low to moderate and let the pan do the rest! High heat will increase the color change with copper cookware but can still be removed with a good copper cleaner. The hammered copper line features a non-reactive, durable surgical-grade stainless steel interior that prevents metallic flavor from copper or other metals from leaching into your food. The aluminum-alloy core found in the Viking 10-piece Hammered Tri-Ply Copper Cookware set evenly transfers heat from rim-to-rim, eliminating hot spots and giving you the perfect sear each and every time. The combination of the three bonded or clad metals distribute heat more evenly across the pan while also maintaining a higher cooking temperature, even while cooking on low-to-medium heat. It is best not to cook on anything other than low-to-medium heat with clad cookware. Ergonomic handles reduce pressure on your wrists and ensure a comfortable grip. Vented, tempered glass lids help prevent boil-overs and allow you to monitor progress without losing heat. Keep the exterior of your cookware looking new by cooking only on low-to-medium temperatures and by regularly wiping it with a copper polish or by using a combination of lemon and salt. Washing your cookware by hand after each use and drying by hand as well will also help to keep its color uniform. It is recommended to store your cookware in a dry location.