How To Elevate Your Jewelry With Surface Treatment Techniques.pptx

Hey jewelry lovers! If you're looking to take your jewelry designs to the next level, you've come to the right place. This presentation is all about how to make your pieces shine brighter and last longer with some cool surface treatment techniques. Whether you're a jewelry store owner, designer, or even a celebrity looking for custom-made pieces, there's something here for everyone!
First up, let's talk polishing. There are so many ways to get that perfect shine. Vibration polishing is great for those big, chunky pieces, while vortex polishing works wonders for lightweight jewelry. Drag polishing is super efficient for heavy-duty items. Each method has its perks, but they all aim to make your jewelry look flawless.
Next, let's dive into electroplating. This is where you can add a layer of gold, silver, or even rhodium to your pieces. It's not just about looks—these coatings make your jewelry super durable and resistant to wear and tear. Plus, chemical plating lets you get creative with colors and finishes without the need for electricity.
Ever heard of leaf vein electroplating? It's a game-changer! By plating delicate leaves, you can create unique, nature-inspired pieces that are both elegant and luxurious. Imagine wearing a piece of jewelry that looks like it came straight from a fairy tale.
But wait, there's more! Surface coloring can transform copper and silver jewelry into stunning shades of black, blue, or even purple. And if you want to get really technical, PVD (Physical Vapor Deposition) coatings can give your pieces a high-tech, durable finish that looks amazing.
For those who love the classics, enamel craftsmanship is still going strong. From painted enamel to cloisonné, these techniques add vibrant colors and intricate designs to your jewelry. And if you're into modern, lightweight options, resin casting is perfect for creating smooth, glossy finishes without the hassle of traditional enameling.
Etching is another technique that's gaining popularity. Whether you're into chemical etching or laser etching, you can create beautiful, detailed designs that look like they were carved by hand. It's perfect for adding that vintage touch to your pieces.
So, whether you're a jewelry store looking to expand your collection, a designer seeking inspiration, or an e-commerce seller wanting to add something unique to your shop, these surface treatment techniques are your secret weapon. Dive into these methods, and watch your jewelry business soar!

1. How To Elevate Your Jewelry With Surface Treatment Techniques Get entire article, please visit: https://sobling.jewelry/how-to-elevate-your-jewelry-with-surface-treatment-techniques/

2. CONTENTS 01 02 03 04 05 Polishing Technology Electroplating Process Chemical Plating Process Chemical and Electrochemical Conversion Film Process for Popular Jewelry Physical Vapor Deposition Process 06 Enamel Craftsmanship 07 08 09 Resin Casting Process Etching Technology Nano ~ Spraying Plating Technology

3. 01 Polishing Technology

4. Polishing Technology

5. Polishing Technology Characteristics of Different Polishing Processes Polishing methods Polishing medium Grinding Medium Advantages Disadvantages Suitable workpiece Vibration polishing Wood chips, porcelain pieces, walnut shell particles, corn flour, steel balls Ceramics, plastic Cheap, large items, stamped parts With long processing time, low pressure, indentations, and poor smoothness effect, achieving ideal results during dry processing is impossible. Small chain, mechanics chain Barrel polishing Wooden cube, wooden needle, walnut shell particles, corn flour, steel ball Ceramics, plastic Cheap Long processing time, inconvenient processing, the surface has dust, the surface is pressed Various jewelry pieces Vortex polishing Walnut shell particles, porcelain pieces, plastic Ceramics, plastic With high efficiency and short processing time, the machine completes the 70% workload, fewer processes, clean jewelry, easy handling, high surface quality It can only handle lightweight workpieces (maximum 20 g) and cannot process small chain gemstone settings. Most jewelry, industrial products, and watch cases Drag polishing Walnut shell particles Walnut shell Granule It can polish large, heavy workpieces without impact or collision, with short processing time, easy handling, and high surface quality No wet grinding Various jewelry pieces that can be fixed on a shelf

6. Polishing Technology Cloth Wheel Polishing Vibration Polishing  Roller Polishing  Vortex Polishing

7. Polishing Technology Dragging Polishing Principle of Electrochemical Polishing

8. 02 Electroplating Process

9. Basic Knowledge of Electroplating for Jewelry Schematic diagram of the metal electrodeposition process

10. Electroplated Copper and Copper Alloys

11. Electroplated Copper and Copper Alloys

12. Electroplated Nickel

13. Electroplated Silver and Silver Alloys

14. Electroplated Gold and Gold Alloys

15. Electroplating Rhodium Main Components of Rhodium Sulfate Plating Solution Rhodium sulfate : Provides rhodium ions for a bright, fine crystalline coating; optimal concentration is 1.6–2.2 g/L to avoid yellowing or roughness. Sulfuric acid : Stabilizes the plating solution and enhances conductivity; low levels reduce coating brightness. Electrode Reaction of Rhodium Plating Anodic reaction: 4OH - 4e = 2H 2 O + O 2 ↑ Cathodic reaction: Rh 2+ + 2e = Rh Cathodic side reaction: 2H + + 2e = H 2 ↑ Rhodium plating is a highly durable, corrosion-resistant, and decorative coating with a bright silvery-white finish; it is typically applied over base layers like silver or nickel due to its high hardness and brittleness, and its sulfate-based plating solution offers easy maintenance and fast deposition for jewelry applications.

16. 03 Chemical Plating Process

17. Chemical Plating Process

18. Chemical Gold Plating

19. Chemical Nickel Plating

20. Chemical Copper Plating

21. Chemical Plating Example: Electroplating of Leaf Veins Leaf vein electroplating involves selecting dense-veined leaves, removing chlorophyll to expose the veins, and then metallizing and electroplating them to maintain their original appearance while adding elegance and luxury. Leaf pendant after chemical plating and surface electroplating treatment Step Process Details 1 Leaf Vein Treatment Soak leaves in an alkaline solution (NaOH) to remove chlorophyll, optionally adding Na₂CO ₃ and boiling for faster results; gently scrub remaining chlorophyll with a soft brush. 2 Surface Metallization Apply chemical nickel plating (26–28 g/L NiSO ₄, 35 g/L NaH₂PO ₂, 20 g/L citric acid) at pH 4.6–4.8 and 90°C to make leaf veins conductive. 3 Decorative Electroplating Perform bright copper plating, then spot weld hanging parts (e.g., hooks) using fine purple copper wire soaked briefly in acid solution (<30s) and soldered. 4 Bright Electroplated Nickel Apply a nickel plating layer to prevent penetration of copper and gold plating (conditions refer to previous process). 5 Electroplated Gold Apply a thick gold plating layer as the final decorative finish.

22. 04 Chemical and Electrochemical Conversion Film Process for Popular Jewelry

23. Chemical Coloring Process of Copper and Copper Alloy Ornaments The surface coloring of copper and its alloys involves chemical reactions with coloring solutions to form oxide, sulfide, or other compound films on the metal surface, producing various colors like black, brown, blue, and purple depending on the solution composition and reaction conditions. The Chemical Reaction Mechanism of Surface Coloring Substrate composition affects the purity and color of copper coatings; high copper content yields better results, while other alloying elements can cause discoloration, requiring adjustments in stabilizer content. Workpiece surface condition impacts color consistency; mechanical energy from deformation can cause localized color differences, which can be mitigated by stress relief annealing, and surface roughness uniformity also affects color uniformity. Special climatic conditions can cause instability in the coloring process of copper alloy jewelry, requiring controlled coloring time to ensure consistent results. Factors Affecting Coloring Effects

24. Chemical Coloring Process of Copper and Copper Alloy Ornaments

25. The Coloring Process of Silver & Zinc and their Alloy Jewelry

26. The Oxidation Coloring Process of Stainless Steel Jewelry Aspect Details Stainless Steel Anodizing Forms a colored oxide layer on stainless steel surfaces using light interference for durable hues. Typical Coloring Methods Chemical Coloring Inco Method : Immerse stainless steel in a chromic acid-sulfuric acid solution at 80-85℃ to form a chromium oxide film, with color controlled by immersion potential; follow with cathodic electrolysis for wear resistance, though color control is challenging. Acheson Method : Electrolyze stainless steel in a chromic acid-sulfuric acid solution below 60℃ using alternating current to form a hardened oxide film, with color controlled by total electric charge, producing bright and unique hues. Oxidation Coloring Involves heating in the atmosphere or a controlled atmosphere to form an oxide film; this method is simple, but it is difficult to control the color, so it is limited to small stainless steel ornaments. The color of stainless steel surfaces depends on factors like film composition, microstructure, smoothness, thickness, and incident light angle, with thin films appearing blue/brown, medium films golden/red, thick films green, and the thickest black; however, achieving uniform color is challenging due to high process requirements.

27. Anodizing Treatment of Aluminum Alloy Jewelry 01 Anodizing and coloring occur in the same solution, forming a colored oxide film on aluminum alloys through selective light absorption. Electrolytic Coloring Method 02 Aluminum oxide films are dyed using inorganic or organic dyes, with the best results from sulfuric acid anodization. Chemical Coloring Method 03 After anodizing, aluminum is immersed in metal salt solutions and colored via AC or DC polarization, depositing metal ions in the oxide film pores. Electrolytic Coloring Method (Two-Step)

28. 05 Physical Vapor Deposition Process

29. Classification of Physical Vapor Deposition Processes Vacuum Evaporation Coating A process where coating material is vaporized under high vacuum and deposited on a substrate, producing pure, thin films with low particle energy and limited adhesion, mainly used in optics and semiconductors. 01 02 A PVD technique where high-energy particles bombard a target, ejecting atoms that form high-quality, strongly adherent, and uniformly distributed films, suitable for various materials. Magnetron Sputtering Coating 03 Combines evaporation and sputtering, using ion bombardment to deposit dense, well-adhered films with high particle energy, excellent surface coverage, and the ability to form compound coatings at low temperatures. Ion Plating Schematic diagram of magnetron sputtering ion plating principle

30. The Application of PVD Coating Technology in the Jewelry Industry Zirconium Nitride Decorative Coating Process Steps Details Pre-Treatment for Coating Sample Cleaning : Ultrasonic cleaning (1% and 5% metal cleaner), hot/cold water rinse, deionized water rinse, alcohol dehydration, and drying. Furnace Cleaning : Wipe and scrape dirt from the vacuum furnace. Coating Process Flow 1. Pre-Evacuation Evacuate to 6.5×10⁻³Pa using mechanical and oil diffusion pumps. 2. Glow Discharge Cleaning Introduce argon gas, apply bias voltage, and use argon ions to clean the workpiece and furnace. 3. Main Bombardment Apply negative bias to accelerate target ions, implanting and diffusing them into the workpiece. 4. Deposition Coloring Introduce nitrogen gas, adjust flow and power, and deposit ZrN film on the workpiece. 5. Passivation Cool and introduce argon gas to stabilize the film and protect the target surface. 6. Inflatable Cooling Cool to 120℃ and introduce air to atmospheric pressure. 7. Opening the Furnace Remove the sample for color, thickness, and Auger analysis. Color Control of ZrN Film Nitrogen Partial Pressure : Affects color (silver-white → deep red). Sputtering Power : Affects color (deep yellow → light yellow). Adjust nitrogen partial pressure to achieve gold-like color.

31. The Application of PVD Coating Technology in the Jewelry Industry Titanium Nitride Decorative Coating Aspect Details Magnetron Sputtering Process for TiN 1. Install Workpiece Mount the workpiece on the fixture and close the coating chamber. 2. Vacuum Extraction Evacuate to 6×10⁻³Pa using a vacuum pump and diffusion pump. 3. Baking Heating Heat the workpiece to the predetermined temperature. 4. Bombardment Purification Introduce argon gas, maintain 1~3Pa, apply 1000~3000V bias, and bombard for 10~20 minutes. 5. TiN Deposition Base Layer: Deposit titanium at 500V bias, 0.3~0.5Pa argon pressure. TiN Layer: Introduce nitrogen, maintain 0.5~0.7Pa, and control titanium sputtering and argon-nitrogen ratio. 6. Remove Workpiece Inflate the chamber, open it, and remove the workpiece after reaching the desired film thickness. Effect of Process Parameters on TiN Films 1. Deposition Temperature Optimal temperature: ~500℃ for highest hardness and adhesion. Too low: Poor film density and coarse structure. Too high: Overheating reduces substrate and film hardness. 2. Deposition Voltage Higher voltage increases plasma intensity, deposition rate, and film microhardness. 3. Workpiece Properties Substrate hardness and surface roughness affect film bonding strength. Higher substrate hardness and smoother surfaces improve film quality.

32. 06 Enamel Craftsmanship

33. Enamel Craftsmanship A complex enamel technique originating from Europe, involving direct painting on metal with multiple layers of enamel, requiring precise color control and repeated sintering, making it highly valuable and intricate. Painted Enamel A traditional Chinese enamel craft using metal wires to outline patterns, filled with colored enamel glaze, and fired at high temperatures, with " Jingtai Blue" being a famous example. Cloisonné Enamel A technique similar to cloisonné, where patterns are carved into metal, filled with enamel, and fired repeatedly to create smooth, glossy designs. Champlevé Enamel

34. Enamel Craftsmanship Painted enamel ornament Pure silver cloisonné enamel pendant Champlevé enamel brooch

35. 07 Resin Casting Process

36. Resin Casting Process Aspect Details Resin Types Soft Resin: Low hardness, used for surface coating, not suitable for grinding/polishing. Hard Resin: High hardness, can be ground/polished for a smooth finish. Epoxy Resin Crystal Glue Composed of epoxy resin, curing agents, and additives. Water-resistant, chemically resistant, and crystal clear. Enhances surface gloss and brightness. Can be mixed with pigments for decorative effects. Comparison with Enamel Enamel: High-temperature fired, hard, durable, but prone to metal oxidation. Resin: Organic, air-dried or baked, simple production, but less durable, heat-sensitive, and prone to aging/fading. Resin Casting Process 1. Preparation Gather tools: weighing instruments, glue mixers, workpiece carriers, drying equipment. 2. Setup Level balance scale, oven, workpiece carrier, and workbench. 3. Weighing Weigh A and B glue in a 3:1 ratio using a clean container. 4. Mixing Stir AB glue mixture for 1~2 minutes at a 45° angle. 5. Dripping Pour mixed glue into a soft plastic bottle and drip onto the workpiece. 6. Defoaming Use a gas torch to eliminate bubbles, maintaining a 25 cm distance and moderate speed. 7. Curing Place workpiece in an oven: 40℃ for 30 minutes, then 60~70℃ until fully cured. Stainless steel resin casting pendant

37. 08 Etching Technology

38. Etching Technology Etching Overview Process of removing unwanted metal using chemical methods. Similar to circuit board production, using acid-resistant coatings and acidic solutions. Applications Suitable for antique-style crafts, jewelry, metal paintings, and hollow art pieces. Increasing export volume in recent years. Types of Etching Chemical Etching : Immersion: Used for small workpieces; multiple pieces processed simultaneously. Spray methods: Continuously sprays etching solution onto large workpieces for full contact and corrosion. Electrolytic Etching : Process: Workpiece as anode, corrosion-resistant plate as cathode; current applied for metal dissolution. Advantages: Fast etching speed, deep pits, high production efficiency. Laser Etching Ultrasonic Etching 01 02 03

39. Etching Technology Partial Metal Etching Solution Formulas Ingredients and process conditions Etching stainless steel Etching copper alloy Etching aluminum Ferric chloride 600 ~ 800 600 ~ 650 450 ~ 550 Hydrochloric acid/( g・L   -1 ) 80 ~ 120 Phosphoric acid/( g・L   -1 ) 20 ~ 30 Copper sulfate/( g・L   -1 ) 200 ~ 300 Sulfuric acid/( g・L   -1 ) 90 ~ 100 10 ~ 20 Nitric acid/( g・L   -1 ) 8 ~ 12 Etching accelerator/( g・L   -1 ) 80 ~ 100 Temperature/℃ 10 ~ 45 15 ~ 50 20 ~ 40 Time/min 15 ~ 20 10 ~ 15 10 ~ 20

40. 09 Nano ~ Spraying Plating Technology

41. Nano ~ Spraying Plating Technology A simple, eco-friendly spraying process that achieves electroplating effects (e.g., gold, silver, chrome) on various materials without conductive layers, offering customizable colors and localized application. Metal deposition occurs through a redox reaction when a metal salt solution and reducing agent are sprayed onto an activated surface, forming a nanoscale mirror finish. Nano Mirror Spray Plating Technology Principle of Nano-Spraying Plating Eco-friendly, low-cost, safe, versatile in color and material application, and produces durable, high-gloss finishes with excellent adhesion and resistance properties. Characteristics of Nano-Spraying Plating

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