Brass and copper 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.
Each and every RMI Laser series is capable of marking on brass and copper and the ideal system for your application depends on your marking requirements. 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.
Tungsten and Carbide 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 RMI 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.
Chrome plating 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 RMI 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.
Plastics and polymers 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 RMI 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.