Subject: Re: strength of hemp fibers
From: jiajen@pc.jaring.my (Gary L. Green)
Date: Sun, 19 Jan 1997 02:58:21 GMT
On Sat, 18 Jan 1997 18:46:49 -0500, Pinky wrote:
>In naturre there exists a natural distinction between hem and
>marijauana. They are essentially the same plant but they have naturally
>differing amounts of THC (Hemp has less). This fact is often overlooked.
Yo Pinky,
Same plant, different strain. Many strains of different strengths.
No, nature doesn't separate and make a distinction, people do.
From:
Your Kind and Humble Narrator
Gary L. Green, B.Sc., D.C.
jiajen@pc.jaring.my
Chiropractor's pick-up lines "What's a lousy joint like this doing in a
nice person like you?"
Subject: Re: Sodium Hydroxide Container
From: Bob Falkiner
Date: Sat, 18 Jan 1997 22:07:07 -0500
Bob Falkiner wrote:
>
> Bruce Hamilton wrote:
> >
> > Archibald wrote:
> >
> > >Help! I am currently processing parts through 180C Sodium Hydroxide
> > >in a Teflon tank using an immersion heater covered in Teflon.
> > >This heater has failed 4 times with the manufacturer (Lufran)
> > >replacing it each time (at no cost) with new design modifications.
> >
> > Pure nickel should work - and should be a better conductor for the
> > heater. I'd go with a thick nickel tube protecting a conventional
> > resistance heater - or if you have the money, a nickel tank with any
> > external heater. I'd suggest more heater surface might help your
> > current heaters - depending on their failure mechanism. Talk to
> > INCO ( International Nickel Company - there may even be a Nickel
> > development agency - there are for several other metals ), or one
> > of the major industrial suppliers of caustic soda about compatible
> > materials. I suspect that any cast iron may have to be of superior
> > quality ( less flaws/inclusions ) that standard cast iron waterpipe.
> >
> > Bruce Hamilton
> You might also try nichrome, as it has favourable electrical
> temp/resistance characteristics as well as being corrosion resistant.
> Coating a heater with teflon makes it a poor heater because of the
> thermal barrier. However at 180C you are working in an extremely
> corrosive environment. If you are sensitive to trace contaminants from
> corrosion, you should look at heating pure water instead, and removing
> low grade heat by flashing and adding high grade heat with superheated
> steam, to maintain your concentration balance, and balance your heat
> loss.
might also consider AC resistance heating as an alternative.
Subject: Re: Sodium Hydroxide Container
From: Bob Falkiner
Date: Sat, 18 Jan 1997 22:04:08 -0500
Bruce Hamilton wrote:
>
> Archibald wrote:
>
> >Help! I am currently processing parts through 180C Sodium Hydroxide
> >in a Teflon tank using an immersion heater covered in Teflon.
> >This heater has failed 4 times with the manufacturer (Lufran)
> >replacing it each time (at no cost) with new design modifications.
>
> Pure nickel should work - and should be a better conductor for the
> heater. I'd go with a thick nickel tube protecting a conventional
> resistance heater - or if you have the money, a nickel tank with any
> external heater. I'd suggest more heater surface might help your
> current heaters - depending on their failure mechanism. Talk to
> INCO ( International Nickel Company - there may even be a Nickel
> development agency - there are for several other metals ), or one
> of the major industrial suppliers of caustic soda about compatible
> materials. I suspect that any cast iron may have to be of superior
> quality ( less flaws/inclusions ) that standard cast iron waterpipe.
>
> Bruce Hamilton
You might also try nichrome, as it has favourable electrical
temp/resistance characteristics as well as being corrosion resistant.
Coating a heater with teflon makes it a poor heater because of the
thermal barrier. However at 180C you are working in an extremely
corrosive environment. If you are sensitive to trace contaminants from
corrosion, you should look at heating pure water instead, and removing
low grade heat by flashing and adding high grade heat with superheated
steam, to maintain your concentration balance, and balance your heat
loss.
Subject: Re: strength of hemp fibers
From: "Eric Lucas"
Date: 19 Jan 1997 08:25:35 GMT
Ummm... Am I missing something here? My great-grandfather, grandfather,
and father all had hemp ropes, and I have inherited several of them. Hemp
used to be the only thing from which high-quality ropes could be made, and
even with polypropylene, it's still the only thing I know of from which can
be made a strong rope which is resistant to photochemical decomposition.
When did the rope I have hanging in my garage become illegal?
Eric Lucas
Gregory Loren Hansen wrote in article
<5bsdh5$ik9@dismay.ucs.indiana.edu>...
> In article <32E1954A.71AAAC46@MIT.EDU>, Pinky wrote:
> >Granted Gary, but the point was that there is no need for
> >mucking about with the genes of cannabis. If the correct strains
> >are chosen there are low enough levels of THC to be negligible.
> >Even lower levels could be obtained through selective breeding.
>
>
> My major concern would be DEA officials who can't tell the difference.
> Before hemp can become useful under current laws, the industrially
> valuable but useless for smoking version must have obvious physical
> differences. Because you know they're going to ban everything that looks
> the same.
>
> --
> "Good things come in small packages. But big things can't, unless
they're
> inflatable or require some assembly." - The Tick
>
