电镀白金的概念 care silver

为什么银的要电镀白金？银是一种不稳定的金属，会因为外界因素变黄变黑，目前国际上还没有阻止其变化的方法，在925银外镀白金（钯，铑），可以有效的隔绝925银对外界空气的接触，这样的白金效果，根据自己对饰品的保护程序不同，一般可以维持4-12个月，之后会变成本色效果，92.5%银+7.5%铜的合金，是国际公认的纯银标准，通常镀白金(铑)，以防因氧化或硫化变黄变黑，没有镀白金的925银，称为“素银” 925纯银 925纯银是含银千分之九百二十五的银（92.5%），和传统上的纯银不同，为了加强银饰的硬度，加入约7.5%的铜，所以925银的银本色会呈现米白银色而不是传统银的银白色。银是一种不稳定的金属，健康人体表的油脂能维护银本色，长期配戴暴露在空气中会变黄，遇到体内有沉积毒素，或碰到“硫”的化学品（如发剂，肥皂等）会突然变黑，所以，配戴银饰能否使之有效的保持银本色，也是身体健康于否的一种表现 银饰品变黑是正常的自然现象,因空气和其它自然介质中的硫和氧化物等对银都有一定的腐蚀作用,在佩戴一段时间后,就会出现一些微小的斑点（硫化银膜）,久之会扩散成片,甚至变成黑色.所以,目前银饰品都有一些因氧化而变色现象.
下面是TBMIC的3个建议:
1、引导消费者应实事求是: 担心银饰变黑是绝大部分银饰消费者的共同心理,而厂商为了争取销售额往往会作夸大承诺,比如说:"绝不褪色,永不变色"等不符合实际的承诺;造成消费者缺乏对银饰品有科学的理解,因此抱有过高的期望,而当在实际配戴中发现与承诺不相符时,就会产生一种被欺骗或上当的感觉,致使其找商家退货、换货,最终吃亏的还是商家自己,也影响商家的信誉,导致销售不理想.所以说,在销售过程中,应正确引导消费者认识到"银会变黑是正常的,但如日常注意保养,是完全可以让银饰持久亮泽的".
2、加强保养知识: 大部分消费者都知道银会变黑，但不知道如何可以不让它变黑或变黑了该怎么办,这才是有些消费者不愿购买银饰的根结所在.所以,传授如何保养和去除银饰表面的氧化物,恢复银饰亮泽的方法是消费者购买信心的保证.主要要做到以下几点:①佩戴银饰时不要同时佩戴其他贵金属首饰,以免碰撞变形或擦伤.②避免接触水汽和化学制品,避免戴着游泳,尤其是去海里.③每天戴完后把它用棉布擦干净,放到首饰盒或袋子里密封保存.④已经氧化变黑了,可以用软毛刷子沾牙膏刷洗:也可用手搓香皂或清洁剂等方式清洗:实在无法处理干净才用洗银水擦洗: 洗完后均要用棉布擦干.
3、银饰密封包装的重要性:由于商家摆放银饰的拖盘或道具均未能起到阻止银饰易氧化的作用:因此容易导致商品在未售出时已失去原先的光泽和吸引力,导致产品滞销.所以银饰的展示和摆放也相当重要:最好选择表面进行抗氧化处理的银饰,并在销售的过程当中一直用密封的塑料袋 来展示产品.

Preventing tarnish and storing your silver:

Tarnish can be minimized during storage. Place individual pieces of silver inside polyethylene plastic bags (Ziploc? bags work great) then seal the bags. Wrap each piece with non-buffered tissue paper (acid-free and of archival quality) or soft, anti-tarnish tissue to guard against humidity and prevent contact with materials from the storage bag to the silver. Tarnish-absorbing cloths and Anti-Tarnish (look for 3M or Hagerty Anti-Tarnish strips) paper strips also work well for a limited time. An alternative choice is to place small containers or bags of desiccated silica gel and activated charcoal inside the bag (making sure each piece is individually wrapped). Storing silver in a special silver chest or box lined with with tarnish preventive fabric is also effective, and you can add a Anti-Tarnish strip into the box/chest and change it every few months. DO NOT use plastic cling wrap, newspaper or rubber bands. They have properties that react with silver causing damage that will require a silversmith to repair or polish it to remove the damage. Cardboard boxes that aren't archival have acids that will tarnish the silver very rapidly. DO NOT lacquer or wax your silver due to the difficulties in obtaining an even coating. Many times if the coating was not been applied well, it may be uneven, have streaks and/or small holes, so that when the object tarnishes, the end result is many times worse than if no coating had been applied at all.

Cleaning Silver
These cleaning tips and hints are for the general public interested in maintaining the majority of personal silver, items that are silver or gold plated need the same type of care. Museum conservators use a different method requiring special chemicals, hours of time and special experience. Remember that the easiest way to keep your silver cleaning to a minimum is to store it properly.
1. If there is no tarnish on your silver, use a phosphate-free detergent to clean it after use. Silver that is used, then gently washed and dried immediately, will require seldom tarnish removal.
2. When first noticed (usually a yellowish-brownish tint), tarnish is easily removed. It becomes increasingly difficult to remove as it eventually turns to black. Frequent light cleanings, (washing the object with a phosphate-free detergent), then drying with a soft cloth is better than waiting until the tarnish gets so difficult to remove that more abrasive polishes would be needed.
3. When polishing or drying always use a clean, soft cotton cloth. Certain items may require a clean soft cotton ball.
4. Rub the object in a straight, back-an-forth manner so to maintain a uniform appearance. Avoid rubbing in a circular motion.
5. Dishwashers: we recommend that you DO NOT put your silver in a dishwasher - dishwashers will often turn silver an odd color and remove oxidation from the pattern. The heat may also loosen knife blades. The detergent and high temperature used in dishwashers is too abrasive, and can leave a dull non-reflective surface, that will require a trip to a professional silversmith to restore.The same applies to silver dips and other "miracle" cleaners. Items with mother-of-pearl, bone or ivory handles should never go in the dishwasher. Rare, old pieces should never be put in the dishwasher or mechanically buffed. Silver that touches stainless steel in the dishwasher can create a chemical reaction, producing black spots on the silver requiring professional refinishing. These pieces routinely end up in a silversmith's shop for blade remounting, reoxidizing, and/or refinishing.