Electroplating 3D Prints Explained: Process, Materials, and Tips

(source: Reddit/BrodieMakes)

There comes a point in every maker's journey when plastic just isn't enough. Maybe you're working on a cosplay part that needs that authentic metal sheen. Maybe your prototype needs a tougher shell. Or maybe, you just want your 3D prints to scream "premium." Let’s take a look at electroplating 3D prints, the process that gives humble plastic the look (and in some cases, the durability) of real metal.

But before you bust out the battery acid and wire, let's break down what electroplating is, how it works, and how to do it right, safely and effectively.

What Is Electroplating in 3D Printing?

(source:SRA Resource)

Electroplating is the process of coating a conductive object with a thin layer of metal using electric current.

The process starts with preparing your 3D printed part, usually made from PLA or ABS, by sanding and smoothing its surface. Since plastic isn’t conductive, the part must first be coated in a conductive layer. This is typically done using graphite spray, copper paint, or conductive ink.

Next, the coated part is submerged in an electrolyte solution along with a piece of the metal you want to plate onto the print, commonly copper, nickel, or even gold for high-end applications. The metal piece acts as the anode, and your 3D print is the cathode. When an electrical current is passed through the solution, metal ions from the anode dissolve and bond to the conductive surface of your print, gradually building up a thin, even metallic layer.

Since most 3D printed parts (especially PLA or resin) aren’t naturally conductive, the first step is always making the surface ready for electroplating by applying a conductive layer.

When done right, you can turn your basic print into something that looks like cast bronze, chrome, or even gold-plated hardware, without investing in metal 3D printing.

Why Electroplate 3D Prints?

(source: Fabbaloo)

● Aesthetic Upgrade: Give your cosplay, props, or prototypes a high-end finish.

● Improved Strength: Adds a minor structural layer, great for models that need a bit more toughness.

● Conductive Features: Some applications like touch sensors benefit from actual conductivity.

● Corrosion Resistance: With the right metal, your prints become more weather and wear-resistant.

The Basic Process: How to Electroplate 3D Prints

Here’s a breakdown of the steps for how to electroplate 3D prints safely and effectively:

1. Print the Part (with Smoother Surfaces)

The smoother the print, the better your finish. Use high-resolution settings and minimal layer lines. Sand and prime if necessary. Here’s our guide on Getting Smoother Curves: Understanding Non-Planar 3D Printing.

2. Make It Conductive

This is crucial. Apply a conductive coating, usually:

● Graphite spray or paint

● Copper-infused paint

● Silver conductive paint

Make sure it’s even and covers all areas to avoid patchy results.

3. Set Up the Electroplating Bath

You'll need:

● A container (non-metal)

● A power source (often 6-12V DC)

● A metal anode (copper or nickel, depending on the desired finish)

● A solution containing metal ions (e.g., copper sulfate for copper plating)

Connect the negative end of the power source to your print, and the positive to the anode. Submerge everything in the solution and let science do its thing.

4. Timing is Key

Depending on the metal and size of the part, this can take minutes to hours. Go too long, and you’ll get lumps. Too short, and your finish won’t stick.

5. Rinse and Finish

Rinse thoroughly and optionally polish for a high-gloss shine. You can also add a clear protective topcoat.

If you're looking to get a high-end finish without investing in materials, tools, or trial-and-error, our professional 3D printing services can help. Whether it's metal-like finishes, functional prototyping, or decorative pieces, we offer precision and polish, literally. Online 3D Printing Instant Quote - JLC3DP.

Tips to Get Better Results When You Electroplate 3D Prints

● Use resin prints for higher detail. Their smooth finish requires less prep.

● Always degrease before painting. Oils from your hands or tools can ruin conductivity.

● Start small. Test on a mini part before going all in.

● Use a voltmeter. It helps regulate power delivery for consistent results.

● Consider dual-plating. Start with copper for adhesion, then add chrome or nickel for aesthetics.

Choosing the right metal for electroplating depends on your goals—do you want a premium look, corrosion resistance, or added strength? Here's a quick comparison of commonly used electroplating metals for 3D prints:

Now that you know the trade-offs, you can choose a metal finish that not only looks the part but performs the way your project needs it to.

Applications of Electroplated Prints

● Cosplay props (lightsabers, armor edges, steampunk gear)

● Architectural models with chrome or brass finish

● Wearable tech that looks stylish and conducts signals

● Custom jewelry made from resin or PLA and coated in real metal

If you’re after the next-level presentation, yes. The difference between a painted print and a properly electroplated one is night and day. With a bit of practice (and some patience), you can create parts that not only look like metal but also feel and wear like it.