International Gold Yellow Code
The International Gold Yellow Code (IGYC) is a standardized color code used to identify and measure the purity of gold. It was established by the International Organization for Standardization (ISO) and is widely recognized around the world. The code uses a series of numbers and letters to indicate the percentage of gold in an alloy.
Format of the IGYC
The IGYC consists of a four-character code:
* First Character: A letter indicating the purity of the gold
* Second Character: A number indicating the percentage of gold in the alloy
* Third Character: A letter indicating the alloying metal(s)
* Fourth Character: A number indicating the percentage of alloying metal(s)
First Character
The first character of the IGYC indicates the purity of the gold according to the following scale:
* A: Fine gold (99.99%)
* B: Very fine gold (99.95%)
* C: Fine gold (99.90%)
* D: Good delivery gold (99.50%)
* E: Commercial gold (99.00%)
* F: Standard gold (98.00%)
* G: Jewelry gold (93.00%)
* H: Dental gold (83.00%)
Second Character
The second character of the IGYC indicates the percentage of gold in the alloy by its fineness, which is the number of parts of gold per 1,000 parts of total metal. For example, a code of “24” indicates pure gold (1,000 parts of gold per 1,000 parts of total metal).
Third Character
The third character of the IGYC indicates the alloying metal or metals used. The following letters are commonly used:
* A: Copper
* C: Silver
* D: Zinc
* E: Nickel
* J: Iridium
* K: Palladium
* L: Platinum
* M: Bismuth
Fourth Character
The fourth character of the IGYC indicates the percentage of alloying metal or metals in the alloy. For example, a code of “C2” indicates an alloy of fine gold (99.90%) with 2% copper.
Applications of the IGYC
The IGYC is widely used in the gold industry, including:
* Determining the purity of gold bullion
* Identifying the composition of gold jewelry
* Regulating the sale and trade of gold
* Establishing international standards for gold quality
The IGYC provides a consistent and reliable method for measuring the purity of gold, ensuring transparency and accuracy in the global gold market.
原创文章，作者：Kevin，如若转载，请注明出处：https://fangeou.com/6881.html
