The use of an Anodised Aluminium Laser Marking Sample Kits can be vital for deciding on the colour scheme of your next product.
Anodised aluminium is a highly versatile material widely used in various industries for its durability, corrosion resistance, and aesthetic appeal. When it comes to laser marking, anodised aluminium offers excellent results, making it an ideal choice for industries that require permanent, high-quality markings. A laser marking sample kit specifically designed for anodised aluminium can be an invaluable tool for businesses looking to explore the capabilities and applications of laser marking on this material.
Anodising is an electrolytic passivation, that is widely used across industry on aluminium for a variety of reasons. The process can also provide a huge range of colour variations through the use of colour dying.
The process changes the microscopic texture of the aluminium by modifying the crystal structure near the surface. Laser marking performs exceptionally well on this combination of material and surface treatment.
The laser is used, to vaporise the top surface to remove the area affected by the anodising process exposing the host material. Where a darker dye colouring is used, the contrast levels remain high between the two contrasting surface areas. Fibre lasers could be used to demonstrate this process as well.
To achieve consistent white marks on aluminium, the correct laser power, repetition rate, marking speed and image fill ratio must all be made. With most aluminium’s a slight deviation, either way, from your standard settings should be enough to pull back any variation you see. In some cases, it may also be worthwhile considering a second pass with much lower power settings to lightly skim the image, removing any burning caused by the initial process pass.
Aluminium corrosion: The general consensus is, as the laser removes the anodised layer an oxide layer, very quickly forms to the surface, providing protection to the material beyond the oxide layer thickness preventing corrosion.
CO2 lasers can also be used to process anodised aluminium. In this case, it is the dye that is directly affected rather than the material. The energy from the laser creates a heating action that removes the dye from the surface. The use of CO2 is generally not as well received as a fibre laser, due to the lower quality created by the mark process.
This is directly related to the fact that the heating effect is difficult to control due to “heat creep”. The result is a fuzzy edge to the mark image, and not as crisp as with Nd:YAG. The main advantage is, that no material is removed, leaving the anodising closer to its original state, and that per unit cost will be slightly higher with CO2, due to the process time being slower.
The Role of an Anodised Aluminium Laser Marking Sample Kit
A laser marking sample kit for anodised aluminium serves as a practical tool for businesses and manufacturers to evaluate the potential of laser marking for their specific needs. These kits typically include:
- Sample Pieces: An assortment of anodised aluminium samples in various colors and finishes to demonstrate how different coatings and treatments respond to laser marking.
- Marking Examples: Pre-marked samples showcasing a range of designs, patterns, and data types, such as text, logos, and codes, to highlight the versatility of laser marking.
- Technical Specifications: Information on laser settings and parameters used for different sample marks, providing a reference for achieving optimal results.
- Application Guidelines: Recommendations and best practices for laser marking anodised aluminium, helping users to understand the capabilities and limitations of the process.
By using a Aluminium Anodising kit, businesses can experiment with different designs and parameters to determine the best approach for their specific applications, reducing trial and error and optimizing production processes.
If you would like further information on this application, or any other application, please request a call back or, talk to one of our laser marking specialists by going to our contact page – link below.
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