Using two 1 ounce pieces of 10 gauge 9999 silver wire.
 
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Here you can see me pouring a gallon of Wal-Mart distilled water into the
1-gallon container.  These jars are available at many stores.  It is
possible to use a jar that has contained an item such as pickles.  If you
are going to do this, you must be prepared to clean the jar very
thoroughly.  I have tried doing this with a jar that contained pickles.  It
took many cycles through the dishwasher and a great deal of time allowing
pure water to stand in the container.  You would be better off simply buying
a new container.  Note that the Multimeter reads zero voltage at this time.

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We have filled the jar with distilled water.  Note that the voltmeter, which
is set on the two-volt range, reads 0.436 volts, which means that our
current is 436 Microamps.  This gives us a good indication of the purity of
the distilled water.  This initial conductivity is related to ions already
in the distilled water.  Most of these will simply be oxygen and carbon
dioxide.  If the initial reading is much higher than this, it is an
indication that the distilled water is not of sufficient quality to make
good colloidal silver.
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In this picture, we can see that the current has increased by nine Microamps
in a matter of two minutes.

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At this time, the current has increased to the point where the meter reads
581 Microamps.  It is time to go to bed and let the process continue.

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As you can see it is now almost 8:30 AM the next day.  I had draped a
dishcloth over the top of the jar to eliminate any possibility of dust
settling in.  Note that the voltage rating has increased to 746 micro amps.
This current is now being carried by silver ions themselves.  We will now
simply let the process continue.

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At this time, I am using one of my green laser pointers to test for particle
content.  Our eyes are 50 times as sensitive to green laser light as they
are to the red laser light.  Using a green laser pointer at this time
enables me to see that particles are forming, although there are too few to
be seen with a red laser.

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Here is a red laser pointer being used at the same time.  You can see that
the beam is present, but much fainter.

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Here is a picture using both the green and the red laser at 5:30 pm.  You
can see that the red laser is almost as bright as the green at this time.
This is because there are a great many more particles scattering the laser
energy.  We are almost done.

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Here is the red laser pointer being used without the green.  The room light
has been turned off.

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Here is the red laser pointer being used at this time with the room lights
fully on.  You can see the laser beam, but it is faint.

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Here you can see just how bright the lights are with the dining room
chandelier turned on.

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Here we are 24 hours after the start of our process.  You can see that the
red laser beam is visible even in this very bright light environment.  We
have now made colloidal silver with the strength of approximately 20 PPM.
At least five PPM of this will be actual particles, the rest will be ionic.
This represents a stronger colloidal silver preparation than can be
purchased at a store.  At this time, you can decant this with a funnel back
into the bottle that the distilled water came in.  It will not degrade.  I
am going to keep this very batch for some time in this glass container and
continue to take pictures of it to show that it does not turn yellow or
degrade in any way.
Best regards,
Arnold