If no visible light is absorbed, it's reflected as white light. The
stronger and more direct the light source, the more the reflected light and
the milkier the CS will appear, yet be colorless and not milky under
indirect light.
Another thing, Colorless CS will also reflect colored light in the
- Original Message -
From: Frank Key fr...@strsoft.com
Frank,
What colour are particles less than 10 nm?
Have you sized a red or yellow sol?
Ivan.
If anyone is really interested I will take a photo of such a solution
and post it on my web site. I routinely make 5 to 10 ppm all
Bob wrote:
Would it be too difficult to build a Zeta portenial measuring device, and
where would I find the layout?
Yes it would be too difficult. It was easy to build, zeta potential instruments
would not cost $30K to buy.
frank key
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Ivan wrote:
What colour are particles less than 10 nm?
The same as in the photo, cloudy, white.
Have you sized a red or yellow sol?
Have not measured a red, briefly looked at a yellow. I have seen slight yellow
with particles over 60-90 nm which is a small fraction of the blue wavelength.
Roger wrote:
Frank: How do you explain the milky appearance for very small particles, or
very large ones, for that matter, if, as Marshall says, light from the
visible part of the spectrum of not adsorbed in either case? Roger
For very small particles, the absorbed light is way below UV
In a message dated 3/27/01 8:58:29 AM EST, fr...@strsoft.com writes:
For very small particles, the absorbed light is way below UV and the
complement is also way below UV, so no coloration is apparent. Since a high
concentration of particles will absorb light to some extent across the entire
Roger wrote:
Frank: Thanks for your reply. Sorry to so persistent, but could you elaborate
more about the physical phenomenon that allows SOME light across the entire
visible spectrum to be adsorbed? And it there any difference in appearance
between large and small particles when both
rogalt...@aol.com wrote:
In a message dated 3/27/01 0:38:19 AM EST, fr...@strsoft.com writes:
The milky appearance also occurs when the concentration of particles is
high and the particle size is very small.
frank key
Frank: How do you explain the milky appearance for very small
I'd be interested in viewing such a photo...
Using a salt or saline solution primer also produces a milky white
substance...
- Original Message -
From: Frank Key fr...@strsoft.com
To: silver-list@eskimo.com
Sent: Tuesday, March 27, 2001 6:57 AM
Subject: Re: CSTyndall yet clear
Roger
A.V.R.A wrote:
I'd be interested in viewing such a photo...
Using a salt or saline solution primer also produces a milky white
substance...
If salt is added, the white particles are silver chloride precipitate.
A photo of milky colored cs is at:
Marshall wrote:
Scattering, basically lots of tyndall. Same reason that dilute milk appears
milky, scattering off of the minute fat particles. Scattering and absorption
are two entirely different and unrelated phenomea. The first has little color
(it can apear to give a blue cast due to
You misread what I said. I said that absorption without any scattering will be
clear, but likely colored, and that scattering without absorption will be
milky, but
with little if any color except for possibly tyndall blue.
The examples you give below have both tyndall and scattering, the milky
Marshall wrote:
You misread what I said. I said that absorption without any scattering will
be clear, but likely colored, and that scattering without absorption will be
milky, but
with little if any color except for possibly tyndall blue.
The examples you give below have both tyndall
-Original Message-
From: Frank Key [mailto:fr...@strsoft.com]
Sent: Tuesday, March 27, 2001 11:01 AM
To: silver-list@eskimo.com
Subject: Re: CSTyndall yet clear
Marshall wrote:
You misread what I said. I said that absorption without any scattering
will be clear, but likely colored
Frank;
Would it be too difficult to build a Zeta portenial measuring device, and where
would I find the layout?
Ole Bob
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brpete...@msn.com.au wrote:
Petemec,
Clear CS with a brigth T.E. (tyndall) most probably says
large particles.
**wouldn't large particles give my solution a
colour(absorption)?
CS absorbs though the spectum depending on size. Smallest particles
absorb in the
brpete...@msn.com.au wrote:
I suggest you look very closely at the Tyndall beam, Pete, particularly
at the consistency of it.
The beam should be a solid homogenous band,
and should not appear grainy at all. If it does appear grainy then the
particles are very large and reflect or diffract
In a message dated 3/26/01 4:16:32 PM EST, mdud...@execonn.com writes:
CS absorbs though the spectum depending on size. Smallest particles
absorb in the ultraviolet band, then that is followed by violet, blue, green,
yellow, orange, red, and finally infrared.Since you cannot see ultraviolet
Correct, and in the midrange, what you see is the complement of what is
absorbed.
However with the bigger particles, although there is no absorption in the
visible
region, there can be definite scattering, making it look milky if of high enough
concentration.
Marshall
rogalt...@aol.com wrote:
Marshall wrote:
Correct, and in the midrange, what you see is the complement of what is
absorbed.
However with the bigger particles, although there is no absorption in the
visible
region, there can be definite scattering, making it look milky if of high
enough
concentration.
The
: Re: CSTyndall yet clear
Date: 3/24/01 8:32:47 AM EST
From: i...@win.co.nz (Ivan Anderson)
Reply-to: silver-list@eskimo.com
To:silver-list@eskimo.com
Good point.
Not as far as I know Roger.
This CS (grainy Tyndall) is likely to be unstable.
Ivan.
Ivan: I have to tell you
looks clear. I have experienced this in an experimental
batch, and was quite surprised.
Other than this I can offer no explanation.
Ivan.
- Original Message -
From: brpete...@msn.com.au
To: silver-list@eskimo.com
Sent: Saturday, 24 March 2001 00:12
Subject: CSTyndall yet clear
Has
In a message dated 3/24/01 3:38:27 AM EST, i...@win.co.nz writes:
Subj: Re: CSTyndall yet clear
Date: 3/24/01 3:38:27 AM EST
From: i...@win.co.nz (Ivan Anderson)
Reply-to: silver-list@eskimo.com
To:silver-list@eskimo.com
I suggest you look very closely at the Tyndall beam, Pete
I suggest you look very closely at the Tyndall beam, Pete, particularly
at the consistency of it.
The beam should be a solid homogenous band,
and should not appear grainy at all. If it does appear grainy then the
particles are very large and reflect or diffract white light but the
solution
Petemec,
Clear CS with a brigth T.E. (tyndall) most probably says large particles.
**wouldn't large particles give my solution a colour(absorption)?
The T.E. can be related to concentration to the first power, and particle
size to the third power.
**So
Good point.
Not as far as I know Roger.
This CS (grainy Tyndall) is likely to be unstable.
Ivan.
- Original Message -
From: rogalt...@aol.com
To: silver-list@eskimo.com
Sent: Saturday, 24 March 2001 21:50
Subject: Re: CSTyndall yet clear
In a message dated 3/24/01 3:38:27 AM EST, i
In a message dated 3/24/01 8:32:47 AM EST, i...@win.co.nz writes:
Subj: Re: CSTyndall yet clear
Date: 3/24/01 8:32:47 AM EST
From: i...@win.co.nz (Ivan Anderson)
Reply-to: silver-list@eskimo.com
To:silver-list@eskimo.com
Good point.
Not as far as I know Roger.
This CS (grainy
- Original Message -
From: rogalt...@aol.com
Ivan: I have to tell you that with my HVAC CS, I can see (and so can
'Ol Bob)
sparklers with a laser. Is that what you mean by grainy Tyndall?
Roger
Imagine a TE composed entirely of sparklies, or as someone once
described it, 'a beam of
Has anyone a decent explanation of how come I get a clear,colourless
colloidal silver which although clear{low turbitity},and colourless (not
yellow or any other hue) exhibits a lovely bright tyndall effect when my
laser is shone through it?
Does this correspond to a high concentration of silver
I would say yes
I have found no truth to the statement that all LVDC CS is mostly ionic.
Some, maybe...but not all.
Ken
At 11:12 PM 3/23/01 +1100, you wrote:
Has anyone a decent explanation of how come I get a clear,colourless
colloidal silver which although clear{low turbitity},and
It simply means that the particles are too small to absorb light in the
visible spectrum, and the Tyndall means that you have lots of particles.
Sounds like good stuff to me.
Marshall
brpete...@msn.com.au wrote:
Has anyone a decent explanation of how come I get a clear,colourless
colloidal
Petemec,
Clear CS with a brigth T.E. (tyndall) most probably says large particles.
The T.E. can be related to concentration to the first power, and particle
size to the third power.
What you do what is COLORLESS not yellow or any other color.
My peculiar generator uses multi frequency pulsed
In a message dated 3/23/01 2:06:03 PM EST, bober...@swbell.net writes:
Subj: Re: CSTyndall yet clear
Date: 3/23/01 2:06:03 PM EST
From: bober...@swbell.net (Robert L. Berger)
Reply-to: silver-list@eskimo.com
To:silver-list@eskimo.com
The T.E. can be related to concentration
Roger;
Check the files, I believe that Marshall was the orginator of that piece of
data, and its been some time ago.
Ole Bob
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