So I can get no VM&P Naphtha here in Italy. I wonder how can I find the right kind... should I just try to see if it evaporates leaving no impurities? if it does evaporate, then it's OK? Does it just need to be 100% naphtha or what?

Please direct me.

Good day everyone.

Put some of it in a white or clear (preferably glass) dish or whatever, test it doesn't dissolve it first. Evaporate a small quantity, several tablespoons and check to see if it leaves any residue behind. If it doesn't then its pure naptha, or at least a suitable solvent.

Also, there is no 'right kind', each company produced slightly different naptha and they all work, pretty much as well as each other, you'd be hard pressed to find differences. If you're really unsure try a small test batch with a really small amount (20g of MHRB) to check if it works.

Check out medical supplys. They might sell some benzine for medical washings. It's got to be highly pure. And it's petrolether/naptha...but check first to be sure.

also look for mineral spirits or white spirit.
it evaps at higher temps than light naptha, but should work well for freeze precipitaion

Lighter fluid?

yep

like zippo fluid

I've been adviced against Zippo fluid, but it should work out fine you say?
Also, I've been wondering if heptane is suitable as a replacement for naphta?

Swim has never tried Zippo but uses Ronsonol and its little brother Permafluid (both of which are basically VM&P Naptha) with great results. However heptane is a suitable replacement for Naptha.

someone at the shroomery reported that zippo fluid evaps with no residue. it's essential composed of C7-C12 aliphatic hydrocarbons, making it a good candidate for freeze precipitation.

heptane is suitable as a replacement for naptha, but it's typically reserved for recrystallization because of its higher cost. light naptha has heptane in it anyway, along with pentane, hexane, octane, and nonane.

In europe, Where SWIM lives at least, You can find naphta under the denominator "washing benzine". If you read the label you should find that it's actually naphta.

Heptane is IME much better at pulling spice than naphta.

So, if naphta is nowhere to be found, heptane is a really good alternative (except pricewise)?

Yes, I'd rather use heptane (if price was no object) than mess about looking for paint thinner/white spirit/lighter fuel/etc.

Chemically pure benzine (heptane) seems harder to get than a few years ago. But something that is quite common here in northern Europe is mineral turpentine, has anyone tried this with good results? The thing that worries me is that turpentine seems to be defined as C9-C16, which seems a bit high, will DMT still be soluble at reasonable quantities? Of course it will be checked for residue before anything, so the main question is if even longer alkanes dissolve spice?