This specification is misleading at best. What PPM really represents is the weight ratio of the amount of silver in solution to the weight of water it is suspended in. A liter of water weighs 1000 grams. So one PPM could be either one milligram of silver in one liter or one microgram in a cubic centimeter of water. Mathematically PPM = 1000grams of water/ x milligrams of silver. Unfortunately this does not indicate how many pieces the x milligrams of silver is broken into. If there is .01 gram of silver in a liter of water, then the label should read 10 PPM.
For a given amount of silver, the smaller the individual particles are, the more particles there will be. Conversely the more particles the smaller each will be. If there were only 100 particles in a dose it could only go to 100 locations in the body, but if there were tens or hunderds of thousands more interaction will take place. Another reason why particle size is important has to do with bio-availibility (the silver found in food is very small).
The meter is just under 40 inches. The millimeter is about .04" or 40 thousandths of an inch. The micrometer is 40 millionths of an inch. A nanometer is one thousandth of a micrometer or 40 billionths of an inch. An angstrum is a tenth of a nanometer. The following discussion will use nanometers nM for all measurements.
The blood flows from blood veins of about 1/8 inch into capillarys with diameters that range from 4000 to 9000 nanometers nM.
Red blood cells are about 7500 nM in diameter, 1900 nM high at the edge and maby 1000 nM high in the middle. They resemble a bean bag that someone was just sitting on. This allows them to pass along the smaller capillarys by deforming their shape without bursting.
The capillaries have slits that are about 6 to 7 nM wide. At the peak of the heart beat the water and other small neutrients in the blood are caused to temporarily leave the capillary to nurish surrounding cells. The fluid around and between cells is about 1/6 of the fluid in your body. It is called interstitial fluid and it is the means for nurishing the body cells that are not supplied directly with blood. Water molecules are about 1/20th the size of the slit pores so it has no trouble going through these small slits. Red blood cells and most blood protiens can not go through. In the case of trauma or shock, these slits dialate and allow some of the protien to temporairly go through. When the capillarys returns to their normal state, the blood protien gets trapped on the wrong side of the capillary. You see it is the job of some of the protiens to draw the interstitial fluid, mostly water, back through the slit as the blood presure subsides between beats. This condition leads to stagnation whereby the cells no longer get fresh water and get rid of their old dirty water. This is otherwise known as edema and is the cause of swelling. I hope that was interesting, but the point is that if the silver or nutrient in the blood is not small enough it can not get to these cells to protect or to nurish them.
Virus are 15 to 150 nM with many in the range of 20 to 40 nM. Bacterium are from 350 to 1000 nM.
If color is caused by reflection of light rays off of particles of a half wave diameter then yellow colored CS has particle diameters dominant in the 290 nM range. Violet will be 200 nM. Red 325 nM. Gray and black will be even larger. I don't think that the individual particles are this large, but lacking sufficient charge they agregate to groups this size. As a group they are less active than a lot of smaller particles.These groups are smaller than bacteria but larger than virus. Also as long as they stick together they cannot go through capillary pores. Colloids can range from 1 to 1000 nM. and still remain suspended in water depending on the temperature.
To not reflect any colored light (clear) the particle size must be less than 20 nM. Clear CS produced by a High Voltage method has been measured to be 1 to 15 nM., some are small enough to penetrate virus and capillary pores.
As mentioned at the outset for a given amount of silver (X PPM) as the size decreases the number of particles increases. It was not however made clear that the number of particles increase with the recriprical of the division to the third power.
Example:
one half = two to the third power = 8 times
one third = three to the third power = 27 times
one tenth = 10 to the third power = 1000 times
Going from 290 nM (yellow) to 5 nM. (clear) produces:
Fifty eight to the third power = 195,112 times as many particles, each with the chance of knocking out a pathagen.