Placa CE de aluminio anodizado grabada con datos técnicos e información de serie

Grabado rotativo y láser sobre aluminio anodizado

¡Descubra nuestra máquina de grabado mecánico y láser para aluminio anodizado!

El aluminio anodizado es aluminio dopado con una capa resistente a la corrosión. La capa anodizada se produce sumergiendo el aluminio en un baño de electrolito ácido junto con una corriente eléctrica llamada pasivación o anodización. El resultado es una fina capa de óxido de aluminio que hace que el metal sea resistente a astillarse o pelarse, apto para alimentos, no tóxico y resistente al óxido. Además de dar al aluminio una mejor resistencia a la luz ultravioleta y la corrosión, una capa anodizada tiene una superficie naturalmente porosa que es particularmente receptiva a los tintes. Por eso hay muchos colores de aluminio anodizado azul, negro y rojo.

El aluminio anodizado es uno de los metales más fáciles de marcar y es muy utilizado en diversos sectores industriales como la aeronáutica o la automoción, pero también se puede encontrar en los componentes eléctricos de la mayoría de electrodomésticos y sistemas eléctricos. 

También hay una nueva tendencia de personalización de artículos gracias al grabado de aluminio anodizado para hacer los artículos más únicos, dar un mensaje, expresar un sentimiento o simplemente hacerlos más bonitos, como termos y botellas, mango de cuchillo, etiquetas para mascotas, fundas de teléfono, computadora y carcasa de tableta y más.

El aluminio anodizado, naturalmente, proporciona un contraste muy alto cuando está laminado, sin necesidad de agregar un aditivo químico después, lo cual es muy interesante para estas aplicaciones.

Sectores principales: -

  • Artículos de promoción y regalos.
  • Automoción y Aeronáutica.
  • Electrónica. - Herramientas.
  • Tratamiento de chapas para la eliminación de la capa anodizada.
  • Placas de identificación.

Gravotech tiene una amplia experiencia en el grabado de aluminio anodizado y aporta su experiencia para ayudarle a encontrar la mejor solución de grabado adaptada a sus necesidades.

Ofrecemos dos tecnologías para marcar y grabar sus piezas y productos de aluminio anodizado:

  • Marcado láser.
  • Marcado mecánico (tecnología dot peen y rotativo).

Nuestra máquina de grabado en aluminio anodizado

Using a marking system dedicated to production lines for laser engraving on anodized aluminum has multiple advantages: speed, consistency and predictability. Integrable lasers are compact and easy to install in production lines, helping manufacturers comply with requirements when applying an identification code or text on this metal.

  • CO2 Laser: System that specializes in the removal of metal surface layers.
  • Fiber Laser: Fast, permanent marking of serial numbers and codes on anodized aluminum parts.
  • MOPA Laser: Variable pulse control for very precise, permanent identification on components.
TechnologyMachinesApplicationsAdvantagesLimitsInvestment level
Laser tables
  • LS100
  • LightSpeed 300
  • LS900
Personalize gifts, objects, or identify batches of parts
  • High-capacity
  • Contrasted marking
  • Required air filtration system
$$-$$$
Laser stations
  • WeLase™
  • LW2
  • LW3
Direct part marking of parts of different shapes or batch marking of ID plates
  • Fast
  • Contrasted marking
  • Requires air filtration system
$$$-$$$$
Rotary
  • M20 X
  • IS400
  • ISx000
Engrave small items, everyday objects, industrial signage, or mill and drill front panels
  • Authentic looking engraving
  • Deep engraving
  • High perceived quality
  • Operating noise
  • Chip management
$-$$
Integrable lasers
  • Fiber Laser
  • MOPA Laser
Serial or sequential marking for high-speed industries with low cycle-times.
  • Fast
  • Contrasted marking
  • Compact machine
  • Requires casing
  • Requires air filtration system
$$-$$$

How is anodized aluminum engraved?

Laser engraving on anodized aluminum


Laser engraving on anodized aluminum is a process well known for its ability to remove the anodizing layer from the aluminum part. The result is a strong contrast between the mark generated by the laser and the surface’s color.

Characteristics of laser marking:

  • Fast
  • Efficient
  • Very precise
  • Works in harsh environments
  • Can maintain material properties
  • Strong contrast with anodization color
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Industrial engraving on anodized aluminum identification plate with CE marking

Rotary engraving on anodized aluminum


With a rotary engraving machine, the material is removed using cutting or scratching tools, engraving cutters of various sizes and shapes or diamond tips. Therefore, the colored layer is removed to make the rough aluminum appear.

Characteristics of rotary engraving:

  • Deep
  • Precise
  • Esthetic engraving
  • Various finishes
  • Cost-effective

Because rotary engravers use cutter tool tips, it is possible to change the engraving finish simply by changing the tool tip. All come with different characteristics; such as blade angle, cutter shape, number of lips, etc.

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Pet tag engraving with rotary engraving machine on green anodized aluminum tag attached to leather collar
Gravoxal™ - Engraving material - Gravograph

Gravoxal™ anodized aluminum

Durable metal by Gravotech

Gravoxal™ is an anodized aluminum produced and sold by Gravotech. Its primary advantage is the high-quality surface anodization, which ensures exceptional engraving precision. This product is usable with rotary or laser engraving machines, and is perfectly suited for outdoor or industrial environments. Perfect for the manufacturing of machine front panels or use as equipment nameplates.

To ease the use of this material, Gravotech has developed a list of parameter presets for its laser table machines.

Discover Gravoxal™
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FAQ: The 6 questions most frequently asked of our experts

🔽 Should I choose laser marking or deep mechanical engraving for anodized aluminum traceability?

It depends on the part's lifecycle. Laser is ideal when speed, fine detail, high contrast and machine-readable codes are priorities. If identification must remain readable after severe abrasion, machining or surface wear, deeper mechanical marking may be preferable. For critical components, define the required marking depth and resistance before choosing between laser, dot peen or rotary engraving.

🔽 When is rotary a good choice for anodized aluminum engraving?

Rotary engraving is ideal for nameplates, control panels, tags and industrial identification plates, especially when controlled depth or color filling is required. Milling extends these capabilities by allowing cut-outs, openings and shaped features to be machined directly into the panel. Machines such as the Gravotech ISx000 are therefore particularly suitable for producing complete anodized aluminum front panels.

🔽 What laser settings should I use for anodized aluminum engraving?

There is no universal setting: speed, power, frequency and focus depend on the anodizing, color, required contrast and laser source. Start with moderate energy and increase it gradually until the desired contrast is obtained without unnecessarily damaging the underlying aluminum. A parameter test matrix is particularly useful when qualifying a new batch or part.

🔽 Does the thickness or quality of the anodized layer affect laser marking?

Yes. Anodizing thickness, dye, sealing and surface finish can influence contrast and the amount of energy required. Two visually similar batches may therefore need slightly different settings. For production work, it is recommended to validate the laser parameters on representative samples and save dedicated settings for each part reference or supplier batch.

🔽 Can anodized aluminum be marked without removing the anodized layer?

Depending on the required result and laser source, the anodized surface can sometimes be modified rather than completely stripped away. A MOPA laser provides greater control over pulse characteristics and can be useful when optimizing surface interaction and contrast. However, the process should be validated if maintaining the protective anodized layer in the marked area is a critical specification.

🔽 Can I mark Data Matrix codes and very small characters on anodized aluminum?

Yes. The achievable high contrast on anodized aluminum makes it particularly suitable for serial numbers, Data Matrix codes and small characters. A Fiber or MOPA laser combined with precise focusing can produce very fine details. For industrial traceability, always validate code readability with the actual scanner and at the smallest marking size required in production.