laser engraving is a Yttrium Aluminum Garnet (YAG) laser.

 Then the flask is injected with molten metal. Once the metal is allowed to cool the plaster is broken away leaving you with a casting of the jewelry design. The casting is then filed, polished, and the final stage of the custom made wedding ring begins. Before you know it, your beautiful ring is ready to go. 
Since their invention in the early 1970s, CNC router machines have changed the performance of wood routing. Today, they are the optimal choice for woodworkers who experience a high production demand, must produce intricate pieces, and/or need to cut costs by reducing waste pieces. To learn more about buying a new or used CNC machine, consult with a seller of new and used woodworking machinery.
The easiest way to incorporate branding in the engraving is to include the company logo. For acrylic and crystal awards these can be laser engraved in high quality; for plaques they can be either laser engraved or printed in full colour. The next step is to choose a good font.
 For the last step, you can visit your local art supplies store, and also crafts center or home improvement retailer. These will give you more option of engraving tolls that are suitable with your needs. Be sure that you will decide to choose the right one as you want. 
No residues are left after completing the process. People are not required to do any chore after the completion of engraving as it is very clean process. No maintenance is required to save the marking. It is permanent and indelible. The marking is not erased even in water or by chemical effect.
Jewelers who stay on top of technological advances know about laser engraving and offer it to their customers. Although laser engraving or marking machines have been around for decades and have been used in many industrial applications, only recently has this type of engraving been applied to jewelry. The most common type of laser used for doing laser engraving is a Yttrium Aluminum Garnet (YAG) laser. YAG is the abbreviation for the type of crystal this laser uses to focus the laser beam. To do the engraving, the laser basically burns your message on to the surface of the ring. This type of engraving is safe to use on all types of metals from soft gold to extremely hard tungsten. One great advantage of laser engraving is that is allows for more types of fonts to choose from and it can engrave just about any symbol or picture.
 Second range of the laser marking machines is well known for their quality, but s advised to do thorough research before purchasing laser machines, be clear regarding the needs and requirements of the organization because of the reason that it is manufactured for the organizations that need to produce large quantity of outputs.