The most basic option on an engraving is "no color fill". This means the engraved areas will be the natural color and texture left by the laser engraving. Each material will leave a different mark when hit with the laser beam. For clear acrylic, this is a frosted, semi-transparent, white (really very light grey) mark. For black acrylic, it is a similar, but darker shade, more of a frosted light grey. For wood, it is a brown color similar to what you would expect from a light 'wood burning'. For stone, it is a white to light grey color, similar to powdered rock. For all materials, it is an attractive, clean, and readable look.
Color fill is the addition of paint to the engraved areas after the engraving is complete. This offers: 1) more contrast for even better readability in more lighting conditions 2) a more professional, elegant appearance and 3) the ability to add your own personal style or to better match to your object being displayed or surrounding decor. Each "swatch" next to the name is an actual daylight photograph of the color fill in question.
We offer standard, metallic, fluorescent, and glow-in-the-dark fills.
The difference between the fluorescent and glow-in-the-dark fills is that the former will only fluoresce while a UV lamp (any wavelength) is illuminating it, while glow-in-the-dark fills will continue to glow long after the UV or normal cabinet lights have turned off.
Fluorescent fills use a fluorescent medium as a top coat over a standard base color, and shine a bluish white under UV light. We use this medium in a precise ratio to make your engraving just bright enough to be easily read in a dark fluorescent mineral display, but not so bright it 'washes out' your specimens. Glow-dark-fills use the finest glow pigments available (Europium-based UltraGlow® powders from United Nuclear) mixed in a transparent medium as a top coat over a standard base color. They are essentially colorless in the daytime, but once the lights go out and/or the UV lamps come on will glow brightly in your selected color for many hours (overnight or longer). Unlike the glow-in-the-dark paints and products of old, these UltraGlow® powders don't wear out over time. We can make to be a subtle effect like we do with our fluorescent fill, or at full intensity, or anything in between.
The reason there is a difference in price between color fill options is due to the fact that some fills cost us more in materials, and some fills require more labor and/or coats to apply properly than others.