2 docs tagged with "metrology"

I received two sets of 10 x 60" "Cymylar" balloons purchased from Yiwu Creative Balloon on the Alibaba site. I paid $62.68 including shipping, import charges, and sales tax, averaging out to $3.13/balloon.

The Mitutoyo 547-401 is a 0–12mm Digimatic digital thickness gauge with 0.001mm (1 micron) resolution and ±3µm accuracy, commonly used for measuring thin film, paper, and plastic sheet. I'm using it for weather balloon envelope material.