Laser Marking

Manufacturers today prefer laser marking for its high-speed and effective marking

capability across a range of materials such as glass, metal and plastics. Laser marking is done by deflecting high-speed laser beams, through a pair of orthogonal galvanometer-driven mirrors, which are then focused through a flat-field lens.

As against traditional marking methods, laser marking is completely hassle-free and does not require technicians to use masks or stencils, or worry over the mechanical or thermal stress, which might damage the items that are being marked. The ease and convenience in using laser marking makes it a versatile technique you can see this technique being used to mark the price and sell by date information on snack packaging to letters marked on computer keyboards.

Today, a range of sophisticated laser-marking methods are available including fibre lasers, CO2 lasers, Q-switched solid state lasers (Nd:YAG and Vanadate) and also the frequency doubled (532nm) and tripled (355nm) solid state lasers. These marking techniques are particularly suited for a wide range of requirements such as

Laser marked identity cards

Photo-quality laser marked identity cards and driving licenses on blank plastic cards can be created with digital images and data can be of fine resolution and also include counterfeit-resistant features. This ensures you have cards of high picture quality with added protection.

Permanent labels on materials such as auto parts

Many components used in the automotive industry need to be temperature and weather resistant. For instance, the labels indicating tyre pressure and fuel levels need to be tamper-evident and completely weather resistant. For such requirements, special laminated labels can easily be laser marked and also cut into desired shapes and patterns, using the same technique. This provides high quality and customizable laser marking capabilities.

High speed laser marking

Production in the snack food industry happens in a large scale, and speed in production is essential to maintain freshness and quick distribution. Laser marking techniques today enable high speed laser coding on moving products such as cartons and cans, and can accurately print on to them product related information such as batch code, sell by date and retail price, as they fly by the packaging line.

by: Brendan Wilde

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