18KGP是什么意思
关键词:18KGP是什么意思
细心的人可能会发现自己的首饰上刻有18KGP的标志,但是对于18KGP是什么意思,相信很多人都是不太清楚的。现在,小编就来为大家介绍一下18KGP表示什么。
一、18KGP什么意思
18KGP是合金仿真首饰的标志,具体是指镀或包金层是18K金的镀金或包金首饰。这些首饰一般是合金或白铜镀上白金,但不含银成分,长期使用容易褪色,使用周期大概在1年之内。
二、18KGP的组成
其由两种标识组成,一种是18K,K代表含金量,即黄金的含量,K数与含金量的关系式为:
Au wt%=K/24×100%。其中,每K含金量为4.166%,即18K含75%黄金。
另一只标识为GP,其是Gold Plape的缩写,商业上俗称为锻压金。这类型产品的金属大多以磷铜为主要材料在高温下锻压而成,然后在其上面覆盖镀金层,我们就是根据这个镀金层的不同厚度分为镀金和包金两种。其中,镀金金层厚度为1咪左右,包金为3咪左右。
三、K金的种类
在国际上流行的K金首饰各种颜色都有,常见的一般有白色和黄色。其根据颜色可以分为颜色金合金和白色金合金。其中,使用最多的颜色金合金是Au-Ag-Cu(-Zn)系合金;白色金合金大多是Au-Ag-Ni(Cu、Zn)和Au-Ag-Pd(-Zn、Cu)系合金。
黄金混入25%的钯或锌、镍等,就会成为白色,因此白K金的主要组成成分还是黄金。从这里就可以看出,白金和铂金不是同一概念,消费者在购买铂金时要谨防奸商用白金鱼目混珠,欺诈消费者利益。
四、18KGP的价格
消费者在购买18KGP首饰时要注意,18KGP是仿真首饰,也就说其本身是不含金银等贵金属的,其只是在铜等其他金属的合金上镀了一层18K金而已,价值是较为低廉的,价格一般只从几元至几十元不等。
本文来源: 大田环球贵金属
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