Blackmarking PERMAblack by PHOTON ENERGY

A saturated black color of the metallic surface can be achieved by using the CEPHEUS ultrashort pulse laser with our proprietary PERMAblack marking process. The markings created with this laser have a deep black appearance that is independent of the viewing angle (in contrast to annealing colors).

Applications (selection)

+ stainless steel

+ medical steel

+ copper

+ noble metals (e.g. gold)

+ anodized or untreated aluminium


+ deep black marking, high contrast

+ independent of viewing angle

+ corrosion-free

+ longevity of marking

+ shorter process cycle

Using the ultrashort pulse laser CEPHEUS together with our unique PERMAblack by PHOTON ENERGY® – process enables us to archive a saturated Darkening of the surface with very little heat exposure. This so-called Black Marking alters the surface of a metal on a nanoscopic level, absorbing all of the incoming light by creating a light trap. Therefore, the marking looks black regardless of the viewing direction and appears dark even with high light intensity. This process is suitable for precise markings on numerous metals such as stainless steel or aluminum. Furthermore any type of metal remains its resistance to corrosion.

Laser Blackmarking with PERMAblack on Metal

Blackmarking on Aluminium

On anodized aluminum, our PERMAblack by PHOTON ENERGY ® marking creates high-contrast, abrasion-resistant lettering without destroying the anodized layer. The properties of aluminum remain intact, i.e. its corrosion resistance and surface structure. Even under an electron microscope, no change in the surface is visible.

Durability of markings

The deep black PERMAblack by PHOTON ENERGY ® marking remains permanently legible even without subsequent treatment. This means that the process can be used in a variety of ways. Because the marking remains black even after many cleaning processes, it is ideal for medical devices. Here we label surgical instruments or implants in a UDI-compliant and highly precise manner.

Passivation of Laser Blackmarking with PERMAblack

3 Reasons to use PERMAblack

Learn why our PERMAblack marking process is setting the industry standard and which advantages it delivers in the context of UDI markings.


The unique nano structures that are induced by our blackmarking process PERMAblack are visible under a scanning electron microscope. These structures are responsible for the outstanding characteristics of the laser markings with our ultrashort pulse lasers.

Blackmarking PERMAblack for corrosion-free Laser Marking on Stainless Steel REM

Resistant against corrosion

Laser markings with our PERMAblack by PHOTON ENERGY process are corrosion-free. The video visualizes the effects of corrosion on conventional laser markings commonly used be many competitors. Blackmarking technology prevents corrosion and delivers long lasting deep black laser markings that are independent of the viewing angle.

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    Discover the technical background as well as application examples of our black marking laser process with our ultrashort-pulse lasers