Method of Controlling Color and Depth of Laser Marking on Anodized Aluminum

Laser marking of anodized aluminum is widely used in industrial labeling, and precise control of the color and depth of the marks directly influences the quality of the final product.The researchers also provided practical methods for adjusting the thickness of the film and optimizing energy density, which will help operators quickly master the core techniques of controlling color and depth.

The change in color of anodized aluminum caused by laser marking is mainly due to changes in the structure of the oxide film caused by the heat effect of the laser.There are three main factors to consider when trying to achieve a stable, controllable color effect. The first is the laser parameters. Excessive power could result in excessive ablation, while too low a frequency could affect the uniformity of the color.Experiments have shown that a power of 20-30 watts and a frequency of 50-80 kHz can produce a clear mark in the black and gray color range.The second is the thickness of the oxide film. It is usually recommended that the anodized film be kept at 8-12 microns. A film that is too thin will limit the range of colors that can be achieved.Finally, the processing environment is managed, with nitrogen gas used as an auxiliary gas to reduce oxidation interference and produce purer colors.

The key to controlling the depth of marking lies in the stepwise adjustment of the energy density.The process involves setting the laser parameters in stages, such as using a high power (35W) setting to treat the base layer, then switching to a medium power (25W) setting to complete the surface coloration, to achieve a depth control accuracy of 0.02-0.2mm.Of particular note is the importance of matching the scanning speed to the pulse overlap rate. When processing fine patterns, lowering the speed to below 800mm / s and maintaining an overlap rate of over 70 % can greatly improve the sharpness of the edges.Pre-treatment is also important. Treating the aluminum oxide surface with alkaline electrolytes to activate it will improve the efficiency of laser energy absorption, and increase the saturation of the same parameters by about 15 %.

The authors recommend the use of orthogonal design to optimize the parameters.By conducting a four-level experiment using three factors--design power (20-35W), frequency (40-100kHz), and speed (500-1500mm / s)--and combining visual color comparison with microscopic measurement, a database of parameters applicable to a particular piece of equipment can be rapidly established.The laser should be calibrated every three months to ensure consistency of energy distribution, which is critical to maintaining color consistency in mass production.

The Relationship Between Anodic Oxide Film Thickness and Laser Marking Color

Experiments were used to verify the effect of different thicknesses of anodic oxidation film on the color of laser marking, revealing the corresponding rules for the thickness of anodic aluminum oxide film and the color of markings.The focus of the article is on how to control the thickness of the oxidation layer to achieve specific colors in products such as electronic casings and metal nameplates, providing practical technical references for the surface treatment industry.

The Impact of Laser Power and Scanning Speed on Marking Quality

Through actual testing data, it analyzes how laser power and scan speed directly affect the results of laser marking, covering key indicators such as depth, clarity and color changes. This helps users quickly master parameter optimization techniques, improving the efficiency of marking and the quality of the finished product.

Solving the Problem of Gray Laser Engraving

The laser marking color turning gray is a common problem and could be caused by material characteristics, parameter settings or the state of the equipment.With hands-on guidance, you will learn how to optimize the material pre-treatment process by adjusting the parameters of power, speed and frequency. You will also learn how to clean and maintain the equipment, so that the laser marking effect will be restored to its original clarity and brilliance, and the problem of the color turning gray will be resolved.

Optimizing Aluminum Oxide Parameters for Industrial Laser Marking

In response to the difficulties of using industrial lasers to mark aluminum oxide, they provide optimized parameters and practical advice.The guide covers core parameters such as laser power, frequency, and speed, recommends suitable equipment models, and shares solutions to common problems with aluminum oxide surface engraving, to help users increase their marking efficiency and product precision.

How Color Is Created in Anodized Aluminum

The book explains the principle behind color changes in anodized aluminum, and combines this with metal surface treatment technology to reveal the effects of the thickness of the anodized film, the composition of the electrolyte, and voltage on the formation of color. This helps users master practical methods for precise control of marking results.

How to Control the Depth of Laser Marking on Aluminum Oxide

He explains in detail how to precisely control the depth of the mark by adjusting key parameters such as laser power, frequency, and speed.By combining practical experience with analysis of the effects of different parameter combinations on marking results, they provide suggestions to help customers achieve high-quality, stable marking results.

Five Tips for Adjusting Laser Marking Colors

If you find that your laser marking is uneven, here are five practical tips that will help you get your laser marking back on track, including parameter setting optimization, material preparation, and equipment maintenance.

Laser Marking Parameters for Anodized Aluminum: From Novice to Expert

The book provides the core parameter settings for laser marking of anodized aluminum, and discusses key issues such as power, speed, and frequency. The book also provides practical solutions to common problems, and helps users master the strategies for parameter adjustment, from the basic to the advanced. It also helps to improve marking efficiency and product quality.