{"id":15754,"date":"2026-07-03T16:40:09","date_gmt":"2026-07-03T09:40:09","guid":{"rendered":"https:\/\/pmac.asia\/?p=15754"},"modified":"2026-07-03T16:40:09","modified_gmt":"2026-07-03T09:40:09","slug":"auruna-215-decorative-gold-plating-electrolyte-for-jewelry","status":"publish","type":"post","link":"https:\/\/pmac.asia\/en\/auruna-215-decorative-gold-plating-electrolyte-for-jewelry\/","title":{"rendered":"AURUNA\u00ae 215: Decorative Gold Plating Electrolyte for Jewelry"},"content":{"rendered":"

In the jewelry electroplating industry, the quality of a gold plating electrolyte directly determines the color, uniformity, and stability of the deposited coating. AURUNA\u00ae 215 is a gold plating electrolyte specifically developed for decorative gold plating applications, featuring a nickel-free and cobalt-free formulation.<\/p>\n

The product not only produces a bright gold coating with excellent color stability but also complies with the RoHS standard, making it suitable for manufacturers seeking safer and more sustainable production processes.<\/p>\n

This article provides an overview of AURUNA\u00ae 215, highlighting its key advantages, practical applications, and the reasons why it has become an ideal solution for companies operating in the surface finishing and jewelry manufacturing industries.<\/p>\n

I. What Is AURUNA\u00ae 215?<\/h2>\n

1. Overview<\/h3>\n

AURUNA\u00ae 215 is a gold alloy electroplating electrolyte designed for decorative gold plating applications. This mildly acidic electrolyte is formulated to produce coatings ranging from light gold to bright gold, making it suitable for products that require an attractive decorative finish.<\/p>\n

A key distinguishing feature of AURUNA\u00ae 215 is that it contains no nickel or cobalt. These two metals are commonly associated with products that come into direct contact with the skin, as they may increase the risk of allergic reactions in certain individuals. By eliminating nickel and cobalt from the deposited coating, the electrolyte is particularly suitable for jewelry, watches, and other accessories intended for everyday wear.<\/p>\n

2. Coating Properties<\/h3>\n
\n
\n\n\n\n\n\n\n\n\n\n\n\n
Property<\/th>\nValue<\/th>\n<\/tr>\n<\/thead>\n
Deposit Type<\/td>\nGold\u2013Iron\u2013Indium Alloy<\/td>\n<\/tr>\n
Alloy Composition<\/td>\n98.5 wt.% Au; 1.4 wt.% Fe; 0.05 wt.% In<\/td>\n<\/tr>\n
Coating Color<\/td>\nApprox. 1N\u20132N<\/td>\n<\/tr>\n
Finish<\/td>\nBright<\/td>\n<\/tr>\n
Hardness<\/td>\nApprox. 220 HV (Vickers HV 0.015)<\/td>\n<\/tr>\n
Maximum Coating Thickness<\/td>\n3 \u03bcm<\/td>\n<\/tr>\n
Coating Density<\/td>\nApprox. 17.5 g\/cm\u00b3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

The electrolyte is designed to operate reliably within a relatively wide processing window. Within the recommended operating range, the coating color remains stable and is not affected by variations in pH or current density, enabling manufacturers to maintain consistent product quality across production batches.<\/p>\n

In addition to rack plating, AURUNA\u00ae 215 is also suitable for barrel plating, providing greater flexibility for different production scales and a wide variety of components.<\/p>\n

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See also:<\/strong> AURUNA\u00ae 556 EF-24 \u2013 Pure Gold Electrolyte<\/a><\/em><\/p>\n<\/blockquote>\n

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See also:<\/strong> AURUNA\u00ae 555 Gold Plating Chemicals for Premium Jewelry Manufacturing<\/a><\/em><\/p>\n<\/blockquote>\n

II. Why Is AURUNA\u00ae 215 Chosen by Many Manufacturers?<\/h2>\n

When selecting a gold plating electrolyte, manufacturers consider more than just the appearance of the coating. Process stability, the ability to meet technical requirements, and suitability for the intended application are equally important. These are also the factors that make AURUNA\u00ae 215 a preferred solution for decorative electroplating applications.<\/p>\n

\"Figure

Figure 1. AURUNA\u00ae 215 Gold Plating Electrolyte<\/em><\/p><\/div>\n

1. Nickel-Free and Cobalt-Free \u2013 Ideal for Products in Direct Contact with the Skin<\/h3>\n

One of the most significant advantages of AURUNA\u00ae 215 is that the deposited coating contains no nickel or cobalt.<\/p>\n

Products such as rings, necklaces, bracelets, watches, and eyeglass frames are typically worn for extended periods. Using an electrolyte that is free of these two metals helps eliminate the risk of skin allergies associated with nickel and cobalt, making it particularly suitable for products designed with user safety in mind.<\/p>\n

2. RoHS Compliant<\/h3>\n

In addition to aesthetics, many manufacturers today prioritize electroplating chemicals that comply with environmental and material regulations.<\/p>\n

The coating produced by AURUNA\u00ae 215 complies with the RoHS standard, providing manufacturers with a suitable solution for applications requiring controlled material composition.<\/p>\n

Using a RoHS-compliant electrolyte also supports greater consistency throughout the manufacturing process, especially for companies serving markets with stringent technical requirements.<\/p>\n

3. Attractive Gold Color with Excellent Color Stability<\/h3>\n

A high-quality decorative coating is defined not only by its initial appearance but also by its ability to maintain consistent color throughout production.<\/p>\n

AURUNA\u00ae 215 produces coatings ranging from light gold to bright gold (approximately 1N\u20132N), making it suitable for a wide range of decorative gold plating applications.<\/p>\n

Within the recommended operating conditions, the coating color remains stable and is independent of variations in pH and current density. This minimizes color differences between production batches and helps manufacturers maintain consistent product quality.<\/p>\n

4. Indium Ensures Uniform Color Distribution<\/h3>\n

In addition to gold and iron, AURUNA\u00ae 215 contains indium.<\/p>\n

This element contributes to a uniform and consistent coating color across the entire surface of the plated component.<\/p>\n

For parts with complex geometries or products requiring a premium decorative finish, maintaining consistent color is a significant advantage. Uniform coatings also help reduce the need for rework, improving production efficiency and quality control.<\/p>\n

5. Easy Operation Across Various Production Processes<\/h3>\n

For electroplating companies, an electrolyte should not only produce an attractive coating but also support a stable and easy-to-control production process. This is one of the key strengths of AURUNA\u00ae 215.<\/p>\n

This mildly acidic gold alloy electrolyte is designed to operate within a relatively wide processing window. As a result, manufacturers can maintain coating quality without continuously adjusting process parameters, provided they remain within the recommended operating range.<\/p>\n

6. Suitable for Both Rack Plating and Barrel Plating<\/h2>\n

Not every gold plating electrolyte is compatible with multiple plating methods. AURUNA\u00ae 215, however, is designed for both rack plating and barrel plating.<\/p>\n

Rack plating is suitable for larger components or parts that require individual positioning during plating, while barrel plating is ideal for processing large quantities of smaller components efficiently.<\/p>\n

Compatibility with both methods provides manufacturers with greater flexibility in selecting production processes while using the same electrolyte system.<\/p>\n

III. Applications of AURUNA\u00ae 215<\/h2>\n

In addition to its outstanding composition and stable operating performance, AURUNA\u00ae 215 is widely used in decorative gold plating applications that require attractive, consistent coatings with reliable quality. Its nickel-free and cobalt-free formulation also makes it an excellent choice for products that frequently come into direct contact with users.<\/p>\n

\"Figure

Figure 2. Applications of AURUNA\u00ae 215<\/em><\/p><\/div>\n

1. Gold Plating for Jewelry<\/h3>\n

Jewelry is one of the primary applications of AURUNA\u00ae 215. Thanks to its unique characteristics, the electrolyte meets both the aesthetic and safety requirements of the jewelry industry.<\/p>\n

Products such as rings, necklaces, bracelets, and earrings require gold coatings with an attractive appearance, excellent color uniformity, and consistent quality across production batches. Since these products are worn directly against the skin for extended periods, using a nickel-free and cobalt-free electrolyte helps eliminate the risk of skin allergies associated with these metals.<\/p>\n

2. Gold Plating for Watches<\/h3>\n

Watches are not only timekeeping devices but also valuable fashion accessories. Decorative components such as watch cases, clasps, and ornamental metal parts require uniform coating color to achieve a premium appearance.<\/p>\n

The bright gold finish and excellent color stability provided by AURUNA\u00ae 215 enable manufacturers to maintain better quality control throughout the production of gold-plated watches.<\/p>\n

3. Gold Plating for Eyeglass Frames<\/h3>\n

Eyeglass frames remain in direct contact with the wearer’s skin and therefore require high-quality decorative coatings.<\/p>\n

Using AURUNA\u00ae 215 produces a uniform gold coating while meeting the requirement of being free from nickel and cobalt. This makes it particularly suitable for premium and fashion eyeglass frames.<\/p>\n

4. Fashion Accessories<\/h3>\n

Beyond jewelry and watches, AURUNA\u00ae 215 is also used for gold plating various fashion accessories, including buckles, decorative fasteners, and other metal components.<\/p>\n

These products require coatings with an attractive appearance, uniform color, and consistent quality across production batches. The stable operating performance of the electrolyte helps manufacturers maintain product quality throughout the manufacturing process.<\/p>\n

IV. Which Manufacturers Is AURUNA\u00ae 215 Suitable For?<\/h2>\n

Thanks to its versatility, AURUNA\u00ae 215 is suitable for a wide range of manufacturing industries, including:<\/p>\n