2010年7月27日星期二

Nickel in Watches Causes Allergic Reactions - Part I

Su***ces that are rough or porous hold back the electrolytic fluid thus turning into active zones where allergenic cations are produced. Afterwards the resulting metal corrosion produces even higher concentrations of the metal ions. When examining the case-back of a chrome-plated watch attacked by sweat, one may notice how much corrosion has taken place. In such a way the wearer of a watch can understand why the skin became sensitive.Besides stainless steel watches and bracelets, it is also important to take into consideration the bi-color watches, meaning those that are made of gold and steel. These can also cause problems to a sensitive skin. Just like stainless steel, gold has different electric potentials, which is why sweat transports ions faster. Thus, an increase in corrosion represents a great risk of allergy. There is a close connection between the rate of corrosion and the rate of allergies. Those who are allergic to nickel obviously should avoid wearing watches containing any nickel at all. An alternative for such watches might be some models from Swatch. The company produces watches made of synthetic materials. Another alternative can be luxury watches made of pink or yellow gold. It is worth mentioning that white gold quite often includes nickel the amount of which can cause allergic reaction of skin. Sensitive skin can also be affected by gold-plated watches. However, an allergic reaction may occur when such watches are worn for quite long periods of time. This is because the thin layer of gold wears off, thus exposing the skin to the metal that contains nickel.