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LASER MARKING MATERIALS AND SAMPLES


​Our Laser Marking Systems are capable of marking a variety of different materials. The most common materials are metals and plastics but our lasers are also capable of marking on ceramics, composites and semiconductor substrates like silicon. Laser engraving metal and laser marking metal are common uses.

Stainless Steel:

Next to aluminum, stainless steel is the most commonly marked substrate we see. It is used in virtually every industry. There are several types of steels, each with varying carbon content, hardness, and finishes. Part geometry and size also vary greatly, but all allow for a variety of marking techniques.

 Each and every one of our Laser Series is capable of marking on stainless steel and the ideal system for your application depends on your marking requirements. Stainless steel lends itself to every laser marking technique used today. Carbon migration or annealing is rather simple and black anneals can be achieved with low or high wattage. Etching and engraving are also easy, because the steel is absorbent and is good enough at thermal transfer to help mitigate damage. Polish marking is possible, too, but it’s a rare choice because most applications require contrast.

S t a i n l e s s     S t e e l 

B r a s s    &    C o p p e r


About us

Contact us


Comtech North America LLC

55 East Long Lake Road

Troy, MI 48085 USA

T i t a n i u m

1. The laser is like a pencil:  the beam emitted from it allows the controller to trace patterns onto the surface.
2. The controller (usually a computer or a tablet) controls the direction, intensity, speed of movement, and the spread of the laser beam aimed at the surface
3. The surface to be marked can be a variety of materials, such as plastics, metals, wood, rubber, leather, ceramics, textiles and many others.

S e m i c o n d u c t o r

P l a s t i c s

Nickel:


Nickel is commonly used as plating. It can be forged or used as the base metal for some parts, but is usually considered too soft for industrial use. The plating is commonly used for protection of parts from corrosive elements. Care must be taken in order to prevent it from becoming pierced or damaged, which would expose the underlying metallic surface.

Each and every one of our Laser Series is capable of marking on nickel and the ideal system for your application depends on your marking requirements. It is our experience that lower powered, faster pulsing lasers yield the best results. Anneal or polish to protect the plating. The annealed marking will be black and the polished marking is typically white. In the rare case that the entire part is comprised of nickel, all marking techniques are appropriate.

 Brass and Copper:

These have high thermal conductivity and thermal transfer properties and are used commonly for wiring, printed circuit boards and pressurized flow meters. Their thermal properties are ideal for laser marking systems for metal because the heat is quickly dissipated. This reduces the impact the laser can have on the structural integrity of the material.

The best marking technique depends on the finish of the brass or copper. Smooth surfaces can offer a soft polished marking affect, but they can also be annealed, etched, or engraved.  Granular surface finishes offer little opportunity for polish. Etching or engraving is best in order to provide readability by humans and machines. In some cases a dark anneal can work, but surface irregularities can cause reduced readability.

G o l d    &    S i l v e r

Silver and Gold:

Precious metals like silver and gold are very soft. Silver is a tricky material to mark as it oxidizes and tarnishes easily. Gold can be very easy to mark, requiring little power to get a good, contrasting anneal.

Each and every one of our Laser Series is capable of marking on silver and gold and the ideal system for your application depends on your marking requirements. Because of the value of these substrates, engraving and etching are not common. Annealing allows the surface oxidation to create contrast, removing only a negligible amount of material.

A l u m i n u m 

© 2018 COMTECH. All rights reserved. Unless otherwise noted, COMTECH, the COMTECH Logo and all other trademarks are property of Comtech North America LLC.

​Laser markers offer a permanent, indelible and versatile way to mark parts for identification. The small spot size, along with short pulses, produces high peak power that can be beneficial in deep engraving with crisp, clear marks and small characters. Our high-quality laser systems are often deployed in the production field to ensure fraud resistant product identification including bar coding, U.I.D., serialization etc.

The laser marking machines we recommend depend on the surface to be marked or engraved and how quickly the parts need to be marked, along with other variables. The optimum way to know which laser marking system is the best fit for your application is for the customer to provide us with a sample of the material to be marked.

Please complete the form located on the link and we will mark your sample parts according to your specifications in our Applications Lab for your review and approval.

COMTECH NORTH AMERICA, 35 YEARS PROUDLY SERVING AMERICA & THE WORLD​   

T u n g s t e n    &     C a r b i d e


N i c k e l

Aluminum:
 
Aluminum is one of the most commonly marked substrates and is used in many industries. Typically, with lighter marking intensity, aluminum will turn white. It looks good when the aluminum is anodized, but white marking is not ideal for bare and cast aluminum. More intense laser settings provide a dark grey or charcoal color. 
 
Each and every one of our Laser Series is capable of marking on aluminum and the ideal system for your application depends on your laser marking requirements. Ablation is the most common marking technique for anodized aluminum, but some cases call for etching or engraving. Bare and Cast aluminums are typically annealed (resulting in a white color) unless a specification calls for greater depth and contrast.



















 


Tungsten and Carbide
These are two of the hardest metals on earth and are widely used in tooling and cutting applications. Another popular segment for these substrates is wedding bands for men. Tungsten and carbide are receptive laser marking metals and laser engraving metals.

Each and every one of our Laser Series is capable of marking on tungsten and carbide and the ideal system for your application depends on your marking requirements. Because these metals are so hard, etching or engraving is typically not recommended. For carbide, because of the darker color it naturally has, getting a contrasting mark is rather easy with even light laser intensity. A white color is most common when polishing or annealing carbide and the contrast is extremely good. Tungsten, being slightly lighter in color, requires an annealed mark to achieve proper contrast.

 

 

 

 

 

 

  







Semiconductor: 

There is a wide range of materials used in the semiconductor industry. You have ceramics, printed circuit boards, epoxy resins/molds, and silicon integrated circuits to name a few. 

Accuracy is required to ensure proper placement and readability of markings that are commonly smaller than 1mm in size and read by vision systems. Depth control limits the amount of particulate dust and thermal transfer to protect sensitive electronics or components.

The 532nm lasers are capable of marking directly onto printed circuit boards without exposing the underlying copper layer. These lasers can even mark silicon wafers or integrated circuits that can only be measured in angstroms. Couple these inherent benefits with advanced optical control to create spot sizes as low as 10um, and you have the ideal laser for semiconductor applications.


















Titanium:

This lightweight super alloy is used heavily in medical and aerospace applications because of its strength, durability and limited mass.  Industries that utilize this material carry heavy liability and need to ensure that the marking being performed is safe and non-damaging. 

Aerospace applications require heavy fatigue testing to ensure no structural damage is incurred by the titanium part by way of Heat Affected Zones (HAZ), recasting/remelt layers, or micro-cracking. Not all lasers are capable of performing such markings. For the medical industry, most titanium parts are actually placed inside of the human body permanently, or for surgical tools which will be used inside of the human body. Because of this, markings must be sterile and durable. Also, these marked parts or tools must be approved by the FDA to ensure that they are truly inert and safe for their intended use.
 






















Plastics and Polymers:

These are by far the most expansive and variable materials that are marked with lasers. There are so many different chemical compositions that you cannot categorize them easily. Some generalizations can be made in terms of markings and how they will appear, but there is always an exception. We recommend test marking to ensure the best results.

A good example of material variability is delrin (AKA Acetal).  Black delrin is easy to mark, providing stark white contrast against the black plastic. Black delrin is truly an ideal plastic for showcasing the capabilities of a laser marking system. However, natual delrin is white and does not mark at all with any laser. Even the most powerful laser marking system will not make a mark on this material.

Each and every one of our Laser Series is capable of marking on plastics and polymers, the ideal system for your application depends on your marking requirements. Because plastics and some polymers are soft and can burn while marking, Nd: YVO4 or Nd:YAG may be your best bet. These lasers have lightning fast pulse durations resulting in less heat on the material. 532nm Green lasers can be ideal as they have less thermal energy transfer and also are better absorbed by a wider range of plastics.

The most common technique in plastic and polymer marking is color changing. This type of mark uses the energy of the laser beam to alter the molecular structure of the piece, resulting in a change in the color of the substrate without damaging the surface. Some plastics and polymers can be lightly etched or engraved, but consistency is always a concern.

WHAT IS LASER MARKING?

A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The term "laser" originated as an acronym for "light amplification by stimulated emission of radiation"

Laser marking leaves marks on an object. which also includes color change due to chemical/molecular alteration, charring, foaming, melting, ablation, and more. A character as small as 0.010 inch can be marked accurately and fast.  The technique does not involve the use of inks, nor does it involve tool bits which contact the engraving surface and wear out, giving it an advantage over alternative engraving or marking technologies where inks or bit heads have to be replaced regularly. 


A laser engraving or marking machine can be thought of as three main parts: a laser, a controller, and a surface (the part to be marked).

OTHER MATERIALS: 


Ceramics:
Non-semiconductor ceramics come in a variety of shapes and forms. Some are very soft and others are hardened providing a lot of variety. In general, ceramics are a difficult substrate to laser mark as they do not typically absorb a lot of laser light or wavelength. However we've done it! 
We offer a 532nm Green laser marking system that is better absorbed by certain ceramics. We recommend you have test sampling done to determine the best marking technique to apply to your ceramic material. Ceramics that can be marked are often annealed, but etching and engraving are sometimes possible, too.




Chrome Plating:
This process provides a stylish and sophisticated finish, and usually requires minimal laser intensity to remove or get through the plating. Care must be taken to ensure the marking happens on the surface only, with no impact to the chrome plating.
Each and every one of our Laser Series is capable of marking on chrome plating and the ideal system for your application depends on your marking requirements. We have found that lower powered, faster pulsing lasers yield the best results. Anneal or polish to protect the plating. The annealed marking will be black and the polished marking is typically white.




 Coated and painted metals:

There are many types of coatings used to harden or protect metals from corrosive elements. Some coatings, such as powder coat, are thicker and require more intense laser settings to completely remove. Other coatings, like black oxide, are thin and meant to protect only the surface. These are much easier to ablate and will provide great contrast marking.
Each and every one of our Laser Series is capable of marking on coated and painted metals and the ideal system for your application depends on your marking requirements. Our laser provides plenty of power to remove or ablate thinner coatings.  It may not be ideal for removing a powder coat but it can easily mark a powder coat. Our more powerful fiber lasers come in 20-50 watts, and can easily remove the powder coat and mark the underlying surface. Our fiber lasers can ablate, etch and engrave coated metals.

Fiberglass and Carbon Fiber:

 Fiber-based materials like fiberglass can be marked with limitations. Because they are composed of individual fibers, the structural integrity can be damaged by the laser, resulting in a blurry marking which cannot be scanned.
Carbon fiber is easier to mark, as the laser typically does not threaten the integrity of the material. However, because of the composition and color of the carbon, the resulting laser mark is always black, which limits contrast and readability.
Each and every one of our Laser Series is capable of marking on fiberglass and carbon fiber and the ideal system for your application depends on your marking requirements. Higher wattage lasers can etch or engrave more quickly, but the lower wattage UM-1 laser can perform the same markings with an extended cycle time. The 532nm Green lasers are also a good choice because they are heavily absorbed and don’t cause a lot of melting.

 Rubber:

Rubber is an ideal substrate for engraving or etching because it is soft and highly absorbent. However laser marking rubber does not offer contrast. Tires and handles are a few examples of markings done on rubber.
Each and every one of our Laser Series is capable of marking on rubber and the ideal system for your application depends on your marking requirements. The only factors to consider are the speed and depth of the marking, as each laser series offers the same exact marking type. The more powerful the laser, the faster the engraving or etching process will be.


Silicon Wafers:


Silicon wafers are often marked with data matrices and serial numbers. The wavelength of choice is usually 532 nm, but in some cases1064nm may work better. Sending samples is always the best way to find out which of our laser marking systems is best suited for your application.