OpTest's "OpTiSurf" is indeed a new way to measure surface roughness. According to OpTest, "The OpTiSurf revolutionizes the measurement of surface roughness of paper. Using advanced optics and algorithms, it quickly quantifies the optical roughness of entire sheets. OpTiSurf correlates with traditional air leak tests but has greater precision and speed, with less maintenance." And I would emphasize that no air is required. I suggest you look at it today--just click on "More" below.
And when you talk to OpTest, please say hello for us here at Nip Impressions.
Answer to last week's riddle: A Pub, or "Public House"
The riddle last week asked: "If you walked towards a building designated "P.H." on an English map, where would you be heading?"
This week's riddle: "Ganges ox to climb chin" is an anagram for a two word term that refers to a novel diagram created by a famous Victorian. Name the type of diagram.