When it comes to the use of low-e, K- or smart glass (switchable glass), interior glass engraving is still a less common, but eye-catching type of laser processing of glass.
It is a fascinating solution because of the many possibilities for two- and three-dimensional designs inside the glass and due to the possibility of integrating photographic motives with nuanced gray scales. The surface of the glass itself is completely untouched by the laser, which means that visible structures only appear on the inside of the glass.
Every single laser pulse creates a 100 micrometre-sized dot in the glass, which the eye detects as a tiny haziness. With many small dots, any two- and three-dimensional motive can be created inside the glass. Normally a distance of about 1mm from the surface of the glass must be kept so that the stability of the glass is not impaired.
A requirement for the internal engraving is that the surface through which the laser beam enters the material is of optically good quality. For this reason, frosted or structured glass surfaces are not an option. If the glass is only frosted or patterned on one side you can of course still work from the clear side towards the frosted side of the glass. But beware: Thermally toughened or safety glass cannot be reliably engraved on the inside.
From our experience, even months after finishing the glass, the micro-structures can lead to a spontaneous breakage of the glass. So wherever stricter safety and stability requirements are needed, e.g. on fully glazed doors, facade elements or shower cubicles, laminated glass made from float glass can be used as an alternative, perhaps in combination with toughened glass. Normal, low-iron float glass (e.g. optiwhite® or starfire®) or laminated glass can be internally engraved with the laser without any problems. That way laser internal engraving can also be used in areas with stricter safetey requirements where it would have otherwise not been applicable.
At cericom, multi-layer laminated glasses with thicknesses of over 50mm have already been internally engraved. Even with material thicknesses of around 200 mm, e.g. through 10 optiwhite layers that are each 19 mm thick, interior engravings with astonishingly good engraving quality have been achieved at cericom. It should be noted that the laser beam is not focused into the interlayers of PVB or EVA foils or casting resins.
Dive in the world of laser crystal!
The brilliant interplay of light and crystal glass preserves moments for eternity. Captured in the third dimension in the image and close enough to touch. Crystal glass is of high-quality, feels heavy in the hand and is already a fascinating material even without laser engraving.
In just a few minutes, you can create beautiful glass images before the eyes of your delighted customers. Fonts, decorative designs and digital photos can also be easily and effectively created in glass in 2 and 3 dimensions. We also offer the powerful crystalab pro software for designing your glass images. Browse our website and you will find that you are entering a world of endless design possibilities.
Whether you want to create high-quality souvenirs, individual gifts or original promotional items - you are welcome to have a look around! Discover the possibilities world of innovative laser technology in combination with crystal glass!
Individual sheets of glass that have already been engraved on the inside can later be processed into laminated glass without any problems. Many other types of glass, such as borosilicate, crystal, quartz and optical glass, can generally be engraved internally by laser without any problems.
Dark and colorless glass ceramics have also been successfully structured with cericom internal engraving systems. Even transparent plastics such as PMMA, polycarbonate, polyamide or PET - just to name a few - can be engraved on the inside with a cericom laser.
If you work with a different laser system, it could lead to blistering and unattractive discoloration due to the burning of the material. Consequently, a multi-pane laminated glass cannot simply be structured with the laser throughout its entire thickness - instead, the structure and thickness of the individual glass and film layers have to be precisely taken into account.
In a glass composite, a distance of approx. 1 mm between the inner engraving and the glass surface has to be kept. This is also required for the organic interlayers in order to ensure the stability of the glass.
With the sub-surface engraving process extremely decorative designs can be introduced into the glass as well as structures that simultaneously fulfil a technical role.
If, for example, parallel slats are lasered into the glass they work like real blinds. The slats would mostly disperse or reflect direct sunlight and turn it into pleasingly soft daylight that illuminates the room.
With laser slats the blind effect can be integrated into windows, curtains or facades. The otherwise visible and frequently annoying sun protection systems attached to buildings are sensitive to the wind and generate cleaning and maintenance costs.
Common slat systems installed in between window panes have a negative impact on the U value of your window. This negative impact does not occur with a laser slat system from cericom.
The laser technology from cericom enables you to integrate this new type of sun and privacy protection subtly in the shell of the building - all while being maintenance free, groundbreaking and aesthetically pleasing.