u/the_falling

I have a magnetic stirrer coming and when I do my extraction I’m going to do a water wash with the magnetic stirrer. I hear a lot of differing things about the amounts of water to be used. From what I’ve seen, if I hypothetically have 100 mls of NPS I should use around 20 mls of water that is warmer than the NPS and using about a teaspoon of pickling salt with no caking agents in it.

I’ve seen videos where people are using considerably more water than NPS, but I want to eliminate as much waste as possible, so for the more experienced filled here, do my numbers seem okay, or should I adjust them? Thank you in advance!

I used Klean-Strip VM&P naphtha and I placed a clean mirror horizontally to use for my evap test. I accidentally spilled about an ounce of naphtha on the mirror and I figured I’d let that evaporate. On a different parts of the mirror, I placed single drops in different locations. When everything was fully evaporated, the single drops left zero residue. You wouldn’t even know anything was ever dripped there. However, where the ounce spill was, there was considerable residue. Is this normal, or should I get new naphtha? I only ask because had I not spilled that ounce I would have assumed based on the single drips evaporating completely that it passed the evap test, but now I’m not sure.

Unfortunately, I didn’t get any pictures.
Here is the link to the SDS if needed:

https://www.barringredients.com/Content/PDFs/GVM46-KS-VM&P-Naphtha-SDS.pdf

EDIT: added sds link