Q: How does it work?

A: Much like a cat's eye, a sphere with the correct optical properties will bounce light inside of it and return it in the direct it came from, and since it's a sphere, this works from any angle. The more accurate the sphere and consistent the glass qualities, the higher percent of light will be "returned to sender" if you will.

Q: Is it safe?

A: Since it is high purity glass with no chemical additives, and is in a spherical non-abrasive form, it is very safe. It also has a very low dust content, as they're accurately sorted by size. The only risk associated is if the beads somehow get crushed, any fine particles can be hazardous to lungs, so if you're planning on using large quantities, do so with ventilation or outdoors where there's always airflow.

Q: How do I use this with paint?

A: Because the pigment has to interact directly with light to be effective, most commercial usage of this pigment is via applying a paint, and then applying the pigment to the surface when it's partially dried. This is the best method since it keeps the pigment in direct contact with inbound light, but other methods will work.

Q: How do I get the most reflective possible surface that's easy to apply?

A: Truthfully, unless you're doing enormous projects or creative/art projects, you should likely consider a prismatic reflective tape instead of paint. "Prismatic" refers to instead of a spherical retroreflector, it actually has what's essentially one corner of a cube, with three flat faces 90° apart from each other. These reflectors are highly efficient, but cannot be applied in paint form since their geometry is very specific, and often fabricated in sheets. For most general safety/marking uses, tape is a quicker and easier option, and can be purchased in practically any color.