I noticed in several of the past posts some references to the color of CS 
produced by various methods under various conditions.  I found this narrative 
on the subject by Zane Baranowski, C.N. in his book, "Colloidal Silver - The 
Natural Antibiotic Alternative", copyrighted 1995 (cost of the booklet back 
then was $3.50) I hope Zane won't mind me extracting a short quote in exchange 
for the plug on his booklet. BTW, Zane is a certified nutritionist from the 
National Institute of Nutritional Education in Aurora, Colorado.

from page 10 ....

    "One indicator of the quality of colloidal silver is its color.  As the 
size of each silver particle gets larger, the color of the suspension ranges 
from yellow (best) to brown, to red, to grey, to black (inferior).  The 
increasing size of the particles also reflects a proportionate decrease in 
quality of the product.  Colloids of silver that are produced using the 
electro-colloidal method are a different color than the grind  or chemical 
method forms of colloidal silver. That rule generally applies, except in the 
case of some brands that use an artificial yellow dye to falsify the proper 
color. Color variance also depends on concentration, stabilizers, and the 
presence or absence of other trace elements.  The ideal form of colloidal 
silver will be almost colorless or have a very light yellow color. Besides 
buying from a reputable company and visually checking the color of the product, 
another quick way to see if a solution contains colloids is by observing the 
Faraday-Tyndall cone effect. When a sharp and intense beam of light passes 
through a colloid solution. the path of the light will appear to be turbid.  
The path of the light is also altered.  The path of the light will form a cone 
shape within the solution.  The best way to observe this is to take a test tube 
of colloidal silver into a dark room and shine a very bright flashlight through 
it. Colloids will appear to be milky.  (Note: a discussion can be found in 
Jirgensons and Straumanis' book titled "A Short Textbook of Colloidal 
Chemistry;" New Yorkk: John Wiley & Sons. Inc.; London: Pergamon Press Ltd.;
1954)"
                                    -----

Nice to know that we are all tracking down the pale yellow (almost colorless) 
electrical road with our super-fine silver particles in the range of 0.005 to 
0.015 microns in diameter, suspended in pure water without the need of any 
chemical, stabilizer, dye or other ingredient.  Good ... works!  Share the 
goodies!

Best of health to all,

Robert Bartell