Methods to Improve the Durability of Marking Colors

In order to address the problems of color fading and corrosion on metal nameplates, the company has developed three core methods: material selection, process optimization, and post-process treatment.These included techniques such as adjusting laser parameters and applying an anti-oxidizing coating, which helped solve the problem of fading and improved the long-term stability of the laser marking colors.

Why do the markings fade?

Many friends have told me that after laser marking, the color fades quickly. In fact, this is related to the characteristics of the material and environmental factors.For example, stainless steel is easily oxidized when stamped at high temperatures, turning black. If no protective measures are taken, the black color will gradually turn to gray.In another example, anodized aluminum is easily corroded by acidic or alkaline environments, causing the color to fade.

Influence of the material itself.

Different metals have different resistance to oxidation. Copper, for example, is naturally prone to rust and discoloration.The addition of chromium or nickel to the alloy is equivalent to giving the metal a "shield," and the color can last for many years.

Choosing the right craft is the key.

The golden ratio of laser parameters.

You must never underestimate the importance of the laser's power and speed settings. If the power is too high, the surface will be burned. If too low, the colors will not show up clearly.He suggested that they first test with scrap metal, to find the lowest power value that would produce the color change in the metal. This would save energy and ensure stable coloration.

A new choice in cold stamping technology.

The latest laser technology, fiber laser cold marking, can change the surface structure of a material to produce a color without burning it.This method is particularly suitable for medical instruments and other objects that are sensitive to heat. Using this method, the color can last three times as long.

Later stage protection is indispensable.

The secret weapon of the transparent coatings.

After the marking is completed, a transparent protective coating is sprayed onto the area, like the plastic film you put on the screen of your cell phone.One tool factory did a test, and found that after two years of use outdoors, the markings on coated wrenches were still clearly visible.

Tips for regular maintenance.

If the parts are exposed to oil, it is recommended that the marked area be wiped with alcohol every six months.Note: Don't use a steel wool scrubber, as it will remove the surface oxide.

Special measures for special cases.

For metal items used at the seaside, it is recommended that anodization be applied before the engraving.A Qingdao boat parts factory tested the effects of the new process, and found that the time that the parts could resist the corrosive effects of salt water was increased from three months to two years.

Finally, I want to remind everyone to be flexible in combining these methods to fit different situations.For example, medical instruments require a high degree of biocompatibility, so you should not use ordinary protective coatings. And large items like outdoor advertising billboards should focus on improving the manufacturing process.As long as the right treatment is used, there is no problem in maintaining the color of the markings for 10 or 20 years, "he says.