As a common use office supply, there are some point which need take into consideration, especially when you make a bulk order:

• Check the surface:

If thermal paper is too white, it means the poorly made in protective and thermal coatings. This is usually caused by adding too much phosphor. High quality made thermal paper usually looks like a little green on the surface of thermal paper.

• Fire burning

Use a lighter to heat the bottom of the thermal paper.

1. If the surface turns brown, which means the surface is unevenly coating. The thermal paper storage time will also be relatively short.
2. If the surface looks like black-green or a little green, and color patches are uniform, and the colour gradually fades from the center to edge, which means it is a good quality paper.