Inside the process of manufacturing metal QR codes

QR barcode labels are a simple, cost-effective way to direct users to a certain website or digital resource, such as an online menu. This modern solution to keeping information up to date without having to reprint hundreds, even thousands, of physical materials is becoming more and more popular with businesses.

To help combat the wear and tear of barcode labels and metal QR codes can be used instead. These harder wearing versions can withstand even the harshest of environments, making them far superior to their traditional paper and plastic-based label counterparts.

How are metal QR codes made?

There are a few methods and processes that can create custom metal QR codes, depending on the finish that is desired. The most popular ways to create metal QR codes are:

Laser marking and engraving

This is the most popular method for its extreme precision and ability to create intricate designs on various metals, down to a few microns deep. It’s a versatile technique suitable for creating QR codes of varying sizes on different types of metal.

Process behind laser marking and engraving

• The design files are uploaded to the laser engraving machine before it starts the engraving process
• The laser can bet set to engrave at precise depths, to a few microns deep

Advantages of laser marketing and engraving

• Extremely precise, allowing for small QR codes with high readability
• No physical contact with the metal, so no reducing wear on tools
• Ideal for serialised QR codes in industrial tracking applications

Chemical etching

This method uses an acid solution to create designs on sheets of stainless steel. The areas not masked by a chemical ‘resist’ are etched away below the surface of the material using a computer-controlled etching line.

It’s particularly useful for creating metal QR codes that are incredibly durable and can withstand harsh environments, such as in the construction and oil and gas industry.

Process behind chemical etching

• A digital stencil of the QR code is applied to the metal
• The sheet is submerged in an etching solution
• The unmasked areas are dissolved, leaving a recessed QR code

Advantages of chemical etching

• Produces highly durable QR codes resistant to abrasion, heat and chemicals
• Suitable for harsh environments (e.g. marine, oil and gas, heavy machinery)
• Cost-effective for larger production runs.

Stamping

This involves using a stamp to imprint the QR code onto the metal. It’s not as precise as laser engraving but can be used to produce a deeper, long lasting QR code.

Process of stamping

• A hydraulic or mechanical press forces the die into the metal sheet
• Can produce either embossed or debossed QR codes

Advantages of stamping

• Creates deep, long-lasting marks that withstand heavy wear
• Faster for mass production compared to laser or etching

Anodisation

This process, particularly effective for aluminum, creates a black design embedded within an anodised layer. This creates an extremely durable image of the QR code.

Process of anodisation

• The aluminium is anodised to form a hardened oxide layer
• The dark QR code is highlighted due to the anodised coating

Advantages of anodisation

• Extremely corrosion-resistant and scratch-proof
• Seamless integration with no risk of peeling or fading
• Commonly used in automotive and consumer electronics

The advantages of metal QR codes over other materials

There are several benefits to using metal QR codes over more traditional paper and plastic-based QR labels. Metal QR codes are:

Hardwearing – The more durable metal material ensures that the QR code can withstand repeated use, even outdoors and in harsh environments
Long lasting – Metal QR codes last longer than paper labels, meaning they don’t have to be replaced as often
Professional looking – A metal QR code is more aesthetically pleasing for a more luxurious, professional look
Higher scannability – Due to the process of stamping, etching or laser-marking the QR code, codes are easier to scan and don’t lose legibility over time
Harder to counterfeit – The process of manufacturing metal QR codes is more difficult for a non-professional to replicate

Top industries for metal QR codes

Some industries benefit more from using metal QR codes than others, particularly industries that operate in extreme environments or require more durability from a label due to frequent use. The top industries that use metal QR codes are:

Oil and gas industry – Offshore platforms and oil processing plants are extremely harsh environments, being exposed to saltwater spray, dust, sand and corrosive chemicals. Metal QR codes have the durability to withstand even the harshest of climates.
Catering – The hospitality and catering industries are high-traffic, high-use sectors that require durable labels that will withstand everyday wear and tear. Metal QR codes are perfect for directing customers to digital menus and can be installed on indoor and outdoor tables with little effort.
Construction – QR codes are a fantastic way to track tools and equipment used by employees and customers. Metal QR codes can withstand the dust, dirt and impacts that are common on construction sites.

Need metal QR codes for your next project? Talk to one of our experts today to discuss your options.

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