Christopher Tidy on Fri, 14 Aug 2020
09:55:58 -0700 (PDT) typed in rec.crafts.metalworking the following:
I might also be tempted to run the same experiment with some vacuum,
as I suspect the trapped air hinders the absorption, but I don't want to
vaporise the ink and fill my vacuum pump with water...

"But, but, but Science!"

De watering the vacuum line is "Merely Engineering(tm)!" (aka
"just money")

I can see a method of a vacuum pump hooked to a tank, which gets
pumped out, the line to the pump closed, then the line to the sample
chamber open. But as you said, you'll still be pumping water out of
solution, thus changing the concentration. Of course, you could seal
the sample so that it gets the vacuum, and not the entire container.

"Why don't you try that and write it up?" B-)


--
pyotr filipivich
"With Age comes Wisdom. Although far too often, Age travels alone."