Teh quantity of particles changes the darkness of the color, the more
particles the darker, thus light yellow, yellow, amber and dark amber
would all be essentially the same particle size. Particle size changes
the color, with the color absorbed going to longer wavelengths as the
particle size increases. Be mindful that the color seen is the
complement of the color absorbed, so as it moves from violet to blue to
green in absorption, you see light yellow to gold, to orange, then red.
Multiple sizes will absorb in multiple wavelengths giving more of a
brown or black.
Marshall
Neville Munn wrote:
The following would support my view, or I support theirs,
whichever, regarding colour...
Quote: "True silver colloids that have a high percentage of the silver
content in the form of nanometer sized
particles will absorb visible light causing the apparent colour to
appear dark-amber, {my 'tea' colour}, or brown.
It is very high concentration of particles, not large particle size or
contamination, that gives these products
such colour." End quote. This comes from an article from CSL.
Probably depends on which published material one wants to believe, I
believe this, and my own visual observations over all else, not to
mention my tested samples of course.
That 1 micron 'colloid' I spoke of earlier would be the upper limit,
however, our particles/particle clusters would fall WELL under that
limit. Unless 'lumps' of silver are found laying in the bottom of my
container...it's all good, and the above quote is relevant.
N.
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