While trying to remelt some old composition rollers recently, I found that some of the material wouldn’t melt. Neither higher temperatures nor additional water helped. All I ended up with was a lumpy soup, from which I strained the lumps…
Category: Testing Equipment
Glycerin Specific Gravity
Today I used my pycnometer and precision scale to measure the specific gravity of the glycerin which we sell and which I use when I’m trying out recipes for home-made composition rollers. I started taking a video of this procedure…
Fixing up a laboratory scale
Several years ago I purchased at an auction a laboratory scale for doing precision weighing. Up until now it has sat in a corner collecting dust, covered with auction stickers and missing one cover. I recently undertook to clean and…
A pycnometer
That’s ‘pyc’ sounding like an ice ‘pick,’ ‘n’ as you would expect, and the rest rhymes with ‘barometer’ with the ‘nom’ being the stressed syllable. This is a fancy name for a container which can be filled to a very…
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