为什么擦银布擦18k金也变黑

近年来，越来越多的人开始购买珠宝首饰，其中包括18K金饰品。然而，一些人可能会发现，他们使用专为擦拭银饰的擦银布擦拭18K金饰品后，金饰品居然变黑了。这引发了人们对于为什么擦银布擦18K金也会变黑的疑问。本文将分析几个可能的原因。

首先，我们需要了解18K金的成分。18K金是由75%的黄金和25%的其他金属合金组成。这种金属合金的添加是为了增加金饰品的硬度和耐用性。然而，有些金属合金中的成分可能对氧化反应更敏感，容易与空气中的硫化物、氢硫化物等有害物质发生反应，导致金饰品出现变黑的现象。

其次，银饰品和18K金饰品具有一定相似性。银饰品通常会在与空气中的硫化物接触时氧化，生成一层黑色的银硫化物。同样，18K金饰品中的金属合金也可能会与空气中的有害物质发生反应，导致表面的金属氧化，呈现黑色。

此外，擦银布可能含有化学物质，例如硫化剂或清洁剂。这些化学物质可能会与18K金中的金属合金产生化学反应，导致金饰品表面的金属变黑。

要避免擦银布擦18K金饰品变黑，以下是一些建议：

1. 避免使用擦银布擦拭18K金饰品。尽量选择专门为金饰品设计的擦拭布或软毛刷进行清洁。

2. 定期清洁金饰品。使用温和的肥皂水和软毛刷轻轻擦拭金饰品，然后用清水冲洗干净。最后用柔软的布干燥金饰品。

3. 存放金饰品时注意防尘。将金饰品存放在干燥、无灰尘的盒子或袋子中，以防止金饰品暴露在空气中。

总之，擦银布擦18K金饰品变黑可能是由于金属合金与空气中的有害物质发生反应导致氧化。避免使用擦银布擦拭金饰品，注意定期清洁和妥善存放金饰品可以帮助保持其原始的亮度和美观。

Why Does Silver Cleaning Cloth Make 18K Gold Darken?

In recent years, more and more people have been purchasing jewelry, including 18K gold pieces. However, some individuals may notice that their 18K gold jewelry turns dark after using a silver cleaning cloth, which prompts the question of why this happens. In this article, we will analyze several possible reasons.

Firstly, it is important to understand the composition of 18K gold. 18K gold is made up of 75% pure gold and 25% other metal alloys. These metal alloys are added to increase the hardness and durability of the jewelry. However, some of these alloys may be more sensitive to oxidation reactions and can react with harmful substances such as sulfides and hydrogen sulfides present in the air, causing the gold jewelry to darken.

Secondly, there is some similarity between silver and 18K gold jewelry. Silver jewelry tends to oxidize when it comes into contact with sulfides in the air, forming a layer of black silver sulfide. Similarly, the metal alloys in 18K gold jewelry can also react with harmful substances in the air, leading to oxidation and a blackened surface.

Additionally, silver cleaning cloths may contain chemicals such as sulfides or cleaning agents. These chemicals can react with the metal alloys in 18K gold, causing the surface of the jewelry to darken.

To prevent the darkening of 18K gold jewelry when using a silver cleaning cloth, here are some suggestions:

1. Avoid using a silver cleaning cloth on 18K gold jewelry. Opt for cleaning cloths or soft brushes specifically designed for gold jewelry.

2. Clean your gold jewelry regularly. Gently wipe the jewelry with mild soapy water and a soft brush, then rinse with clean water. Finally, dry the jewelry with a soft cloth.

3. Store your gold jewelry in a dust-free environment. Keep the jewelry in a dry box or pouch to prevent exposure to the air.

In conclusion, the darkening of 18K gold jewelry when using a silver cleaning cloth may be due to the oxidation of the metal alloys in response to harmful substances in the air. Avoid using a silver cleaning cloth, and ensure regular cleaning and proper storage to maintain the original brightness and beauty of your gold jewelry.