3. Material Science: The “K9 Crystal” Standard
A common mistake for trophy manufacturers moving into SSLE is assuming all glass is created equal. Internal engraving is incredibly honest; it reveals every flaw in the material.
Why You Need K9 Crystal
Standard soda-lime glass (used in windows and cheap bottles) contains a high amount of iron and microscopic impurities. If you try to use an SSLE laser on this:
- Laser Scattering: The beam hits an impurity on its way to the center, causing a “streak” or an unwanted internal crack.
- Color Tint: Cheap glass has a green or yellow tint that muddies the high-definition look of the white dots.
K9 Crystal (Borosilicate) is the industry standard for high-end internal engraving. It is lead-free, has high light transmission, and is free of bubbles and seeds. When you use a HeatSign SSLE machine on K9 crystal, the dots appear as bright, brilliant white sparks against a perfectly transparent background. CO2 lasers, by contrast, are “blind” to material purity because they only care about the surface.