11 replies to this topic

[overflow]

The size is almost perfect, sodium hydroxide is water soluble so i have no problems in cleaning it; any reasons i shouldn't use it as a milling jar?

[Andrew]

If the jar is strong enough and you can get an air-tight seal on the closure there should be no problems.

As with any new jar, check it regularly for leaks and abandon any jar that does leak, it's not worth the hassle making it air-tight.

[overflow]

you can get an air-tight seal on the closure there should be no problems.

This is the goodie... sodium hydroxide is very hygroscopic and so the container has an airtight lid

[pudi.dk]

Well I've obtained a protein jar, air-tight, although I'm not sure it is strong enough. The sides of the jar can easily be pushed in with a finger.

How strong should it at least be?

[paul]

You get it air tight (if it isn´t already) when running a strip of tape around the lid and the container. I "secure" my lid this way every time. The lid itself is tight enough but the tape helps to get it really secure.

[Andrew]

Well I've obtained a protein jar, air-tight, although I'm not sure it is strong enough. The sides of the jar can easily be pushed in with a finger.

How strong should it at least be?

Yeah they are really flimsy aren't they. Basically it needs to be strong enough so that the sides do not buckle.

There is a nice little trick I thought of (sure it's been done before mind), by introducing liquid butane to the jar the container self pressurises to 4bar. With the vapour pressure of butane being ~4 bar, that pressure will not be exceeded, any excess gaseous butane will liquefy. The internal pressure prevents the walls from buckling no matter how flimsy it is. It does have to be strong enough to hold that pressure, most PET bottles are (like 3L cider bottles; I use these!).

You get it air tight (if it isn´t already) when running a strip of tape around the lid and the container. I "secure" my lid this way every time. The lid itself is tight enough but the tape helps to get it really secure.

It's good as a second level of safety but I would not rely on it, stopping the dust at the seal prevents all sorts of nasties, like dust sticking to the tape and generally going everywhere up to the seal.

[overflow]

There is a nice little trick I thought of (sure it's been done before mind), by introducing liquid butane to the jar the container self pressurises to 4bar. With the vapour pressure of butane being ~4 bar, that pressure will not be exceeded, any excess gaseous butane will liquefy. The internal pressure prevents the walls from buckling no matter how flimsy it is. It does have to be strong enough to hold that pressure, most PET bottles are (like 3L cider bottles; I use these!).

With the chemicals?
And where do you find butane?

[MFX]

With the chemicals?

Not much point in milling butane on it's own

And where do you find butane?

In cans marked "Butane refill" used for refilling cigarette lighters.

[overflow]

Not much point in milling butane on it's own

It does make sense
I was just worried of the reactivity of butane with pyro chemicals

[Andrew]

Not much point in milling butane on it's own

lmfao



Yeah, lighter refills are ideal as they are easy to use.

[MFX]

It does make sense
I was just worried of the reactivity of butane with pyro chemicals

I believe Butane is Relatively unreactive (except in the presence of oxygen and a flame ) I'ts used as a propellant in many products however according to http://www.coleparme...fo/chemcomp.asp
it can have a "severe effect" on some rubbers and plastics so it's worth checking your particular setup first!

[Andrew]

it can have a "severe effect" on some rubbers and plastics so it's worth checking your particular setup first!

A good use of milling liquefied Butane on it's own!!!