The watchband and watchcase can be divided into white steel belt (shell) # gold belt (shell) #18K white gold belt (shell) #18K gold belt (shell) and belt; In particular, stainless steel belt (shell) and 18K belt (shell) have unique and special metallic luster, which makes them the first choice for many watch fans. If the universal watch is not properly maintained, the strap and case will become dim! What about discoloration and scratches of 18K gold and 18K platinum belt (shell)? According to the manufacturer&;s statement, the 18K gold watchband (case) contains 75% gold, 5% ~ 10% copper, 15% ~ 20% silver and 0% alloy. 75K。 The 18K white gold watchband (case) contains 75% gold, 11% platinum, 11% silver, 3% nickel and 0 alloy. 75K white gold. In addition to gold, other silver and copper metals will have chemical effects when they meet the acid and alkali in the air, and some high acid and alkali will occur when people wear them for a long time. If you wear a bath, the K-gold belt (shell) will the oxygenation to amber more easily. When iwcwatches are worn, there will be some scratches caused by careless impact or inappropriate touch. As long as the strap (shell) shows a scratch, the whole watch will be affected. Worldwatch such as watches have been worn for a long time, and the appearance is damaged or collided to sink in severely, so it can be sent to the nearby clock shop, which can be used as a watch beauty scheme for all.