Hello Markus, Tuesday, January 6, 2009, 10:02:35 AM, you wrote: > Then, Stefan wrote " If you want to measure this, you can get a > hydrometer. The ones sold for car battery acid checks will usually do. A > refractometer should work as well." > A hydrometer - when useing google - seems to be a device to measure > humidity? Correct? What is a "refractometer", which of the two would be Device for measuring humidity is named HyGrometer: http://en.wikipedia.org/wiki/Hygrometer > I'm sorry if these are dumb questions, but since working with chemistry There are no dumb questions, only dumb answers :) For Hydrometer: http://en.wikipedia.org/wiki/Hydrometer For Refractometer: http://en.wikipedia.org/wiki/Traditional_handheld_refractometer -- Best regards, Zoran A. Scepanovic zastos@... ********* COINCIDENCE happens. ********* Please be advised what was said may be absolutely wrong, and hereby this disclaimer follows. I reserve the right to be wrong and admit it in front of the entire world. Local time: 10:40 [Non-text portions of this message have been removed]
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Re: [Homebrew_PCBs] Shelf life of HCl/H2O2
2009-01-06 by Zoran A. Scepanovic
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