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Colloidal Gold Production / Re: Colloidal Gold first try.
« Last post by kephra on Yesterday at 05:14:31 PM »
Its done when there is no more change, and no chlorine coming off.  You can't overcook it.
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Colloidal Gold Production / Re: Colloidal Gold first try.
« Last post by cosanostra on Yesterday at 04:43:14 PM »
Agh yes, it was chlorine taste and smell. I thought, when color get rich enough it's done. I made new batch with 2/3 NaCl and almost double of time and get richer color and no taste. But how to know exactly when it's finish, something about bubbles? Posibbility of overcook?
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Quote
The other day someone got me confused by saying that gelatin capped nano silver would be categorized as "mild silver protein", is that correct?
Absolutely not!.  Mile silver protein is silver nitrate and sodium hydroxide mixed into a gelatin mixture.  It is not silver nanoparticles but is high strength ionic silver.  Silver nitrate is very acidic and caustic and the sodium hydroxide was used to neutralize the acidity.

OK, thanks for that. Seems that someone was even more confused than I was  ;D
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Colloidal Gold Production / Re: Colloidal Gold first try.
« Last post by kephra on Yesterday at 01:00:43 PM »
If you taste chlorine (not salt), it is not done yet.   It should not taste like chlorinated water.  It may taste salty because of the residual sodium.
Decreasing the amount of sodium chloride will decrease the time, but also decrease the ppm strength.
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Colloidal Gold Production / Re: Colloidal Gold first try.
« Last post by cosanostra on Yesterday at 12:08:34 PM »
Can I ask - my running time is 30 mins and there is chloride taste. The amount of sodium chloride is on your formula - if I cut it, this would reduce possible time of electrolysing and could reach end point soon before 30th min, but without chloride taste. Right?
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Colloidal Gold Production / Re: Colloidal Gold first try.
« Last post by kephra on Yesterday at 02:07:13 AM »
Quote
In your 20mA experiment you quote mA-mins (12V - 72ma-mins/ml; 40V - 42mA-mins/ml) and one post followed instructions achieving almost 42mA-mins/ml so my 14mA-mins/ml seemed weird as the resulting colour/clearness seemed too good?
I think you are thinking of someone else. I have always said ma-minutes is useless as an indicator because gold requires 3 electrons to be made into gold chloride and dissolve, and there is no guarantee that the same gold atom will collect all three. 
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Colloidal Gold Production / Re: Colloidal Gold first try.
« Last post by tony14 on Yesterday at 01:35:20 AM »
Quote from: tony14
I think I stopped too soon as it's only 14mA-mins but the colour was so deep ruby red (cinnamon?) it was exciting & I didn't want any purple & current falling seemed important?
ma-minutes does not apply to making gold.  The end point occurs when the solution runs out of chloride.

Thanks Kephra. I must be getting confused?
In your 20mA experiment you quote mA-mins (12V - 72ma-mins/ml; 40V - 42mA-mins/ml) and one post followed instructions achieving almost 42mA-mins/ml so my 14mA-mins/ml seemed weird as the resulting colour/clearness seemed too good?
Again, I used 500ml DW and I saw advice of 'double water quantity=double time' and I only ran for the 20mins advised for 250ml yet the result was good? This makes me even more confused.

What 'chloride'? Presumably this is sodium chloride that gets used-up and conductivity decreases reducing the formation of gold chloride, so, does the current falling indicate the end of the reaction and can be used as an 'end-point'?

tony
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Colloidal Gold Production / Re: Colloidal Gold first try.
« Last post by kephra on March 21, 2019, 01:08:04 PM »
Quote from: tony14
I think I stopped too soon as it's only 14mA-mins but the colour was so deep ruby red (cinnamon?) it was exciting & I didn't want any purple & current falling seemed important?
ma-minutes does not apply to making gold.  The end point occurs when the solution runs out of chloride.
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Colloidal Gold Production / Re: Colloidal Gold first try.
« Last post by Shadsu on March 21, 2019, 12:48:54 PM »
You had more luck than me.
I had something red only in my third try. :)
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Colloidal Silver Production / Re: USB POWERED COLLOIDAL SILVER GENERATOR
« Last post by kephra on March 21, 2019, 10:56:05 AM »
Quote
I however follow rudimentary chemistry, use recipes, and didn't consider the reaction continuing beyond the reducing agent.
So are you saying that the rules of physics and chemistry do not apply to you?

I suggest that you actually measure your current.  I bet it is not 6 amps.
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