CO2 laser  is widely used in flexible packaging & labeling industry, but there are three wavelength which is often used , they are : 9.3 µm, 10.2 µm, and 10.6 µm.10.6 µm is the most popular and performs well for most applications. 9.3 µm and 10.2 µm are used to process special materials like Polyethylene Terepthalate (PET) or Polypropylene (PP) based on their specific absorption spectrum.

Each material has a characteristic absorption spectrum-that is, light of a specific wavelength.A given material is easier to absorb than other materials. Why is this important? Laser produces very specific light wavelength. By choosing this wavelength with a material that easily absorbs it, the application result is higher quality and faster processing speed. 

10.6: This wavelength is suitable for the most common marking, engraving and cutting applications.

10.2:Polypropylene film (OPP, CPP, PP), commonly used in labels and packaging, can be increased by 2.5-4 times,when cutting or perforating at this wavelength.Glossy cardboard packaging can be marked with higher contrast at this wavelength,Because the packaging includes a polypropylene surface layer.

9.3:There are many forms of PET . It is usually used as rigid packaging (especially water bottles or beverage bottles), PET film can be used for packaging and electronic screen protective film. When cutting, this wavelength produces the smallest melting or heat affected zone (HAZ) along the cutting edge, resulting in higher quality results.

Using the high peak power version of this wavelength, the polarizing film of LCD displays can be cut cleanly with minimal melting or HAZ.

Kapton film is commonly used in electronic products. The high peak power version of this wavelength reduces the charring characteristics of this material, producing better results when cutting, drilling or ablating.

Polycarbonate is used across a variety of industries for its durability. A high peak power version of this wavelength significantly reduces the charring and discoloration commonly associated with laser processing this material. 

Pebax Plastic is often found in medical tubing. This wavelength produces better vaporization with less melting when cutting or ablating Pebax. 

By selecting the appropriate laser wavelength for the material, the application result is of higher quality and can be processed at a higher speed. Optimizing the absorption of laser energy for sensitive materials, such as films, or processes with high tolerances, such as selective cutting of labels.