Until a few years ago, glossmeters drifted accurate measurement of gloss was difficult if not impossible. Either the zero drifted or high value readings drifted, or both. Even today there are glossmeters which suffer from these problems. Control features built into the Rhopoint NovoGloss and LabGloss have reduced both long and short term drift to negligible proportions. Errors in reading due to Infra Red reflection have been effectively eliminated.
Pigment & Resin Technology – Emerald Publishing
Published: Jan 1, 1991