Colloidal Silver and Gold Forum

Production Techniques and Chemistry => Questions and Comments about Articles => Topic started by: Aureum on January 24, 2013, 08:48:59 PM

Title: Making Colloidal Gold with GC
Post by: Aureum on January 24, 2013, 08:48:59 PM
When making colloidal gold using your recipe you say:

Quote
    7)  Reheat to boiling again.
      Allow to stand until color change to ruby red is complete.  If you have a stirrer, use it.  Expect 5 to 10 minutes for completion.


Should we cut the heat when it reaches boiling and let it cool while stiring for another 5, 10 or so minutes?

Being somewhat color blind I am not sure when "change to ruby read is complete" but I can tell when it is getting darker.

Is it easy to boil it for too long?

Thanks
Title: Re: Making Colloidal Gold with GC
Post by: Aureum on January 24, 2013, 09:21:23 PM
OK

The one on the left I made a few days ago and continued boiling for 10 minutes or so.

The one on the right I just made less than an hour ago and cut the heat shorly after it started boiling but kept stiring for some time.

I beleive I mixed the ingredients the same (I hope so anyway) yet the first one is quite a bit darker. Could I be doing something wrong?
Title: Re: Making Colloidal Gold with GC
Post by: kephra on January 24, 2013, 09:26:38 PM
The one on the left looks correct.  The one on the right looks weak, and/or it doesn't have enough reducing agent.

I suggest adding a few more drops of sodium carbonate and some more maltodextrin to see if it darkens.

I heat mine to the boiling point in the microwave and turn it off as soon as it starts boiling.  The reaction is always done by that time.
Title: Re: Making Colloidal Gold with GC
Post by: Aureum on January 24, 2013, 09:28:35 PM
Should I heat it to boiling again also?
Title: Re: Making Colloidal Gold with GC
Post by: kephra on January 24, 2013, 09:47:08 PM
Yes
Title: Re: Making Colloidal Gold with GC
Post by: Aureum on January 24, 2013, 09:59:04 PM
Oops, I see you said that :-[


Doing too many things at once.

Thanks
Title: Re: Making Colloidal Gold with GC
Post by: Aureum on January 24, 2013, 10:32:27 PM
That seems to have done it. They are both about the same now. So, I guess that answers my first question. I should allow it to continue to boil until it darkens. Too much boiling does not seem to be a concern.

Thanks. :)
Title: Re: Making Colloidal Gold with GC
Post by: samiam on February 21, 2013, 03:38:39 PM
Are there any concerns in microwaving colloidal solutions filled with metalllic(silver/gold) particles?.. I've done it before but just started wondering if it does anything to those precious metal particles.. Probably non-issue for 'nano' particles but Just curious.. Thanks!
Title: Re: Making Colloidal Gold with GC
Post by: kephra on February 21, 2013, 05:35:14 PM
There is no problem with using microwaves to heat your solutions.  The frequency of the microwaves is not resonant with nanoparticles.

Title: Re: Making Colloidal Gold with GC
Post by: mrb123 on December 18, 2014, 04:21:00 AM
I just made my first batch of colloidal gold using the gold chloride method. Nice dark ruby red; I followed the basic recipe.
Sorry but for some reason I am having trouble uploading a pic.
Title: Re: Making Colloidal Gold with GC
Post by: kephra on December 18, 2014, 03:33:35 PM
See http://www.cgcsforum.org/index.php?topic=2082.0
Title: Re: Making Colloidal Gold with GC
Post by: mrb123 on December 18, 2014, 05:17:09 PM


This is the message I get:
Cannot connect to the website

Please make sure:

- You have entered the correct URL.
- You are connected to the Internet.
- Your firewall is properly configured.
- The website is not encountering any technical problem at the moment.

Error code 124 (net::ERR_WINSOCK_UNEXPECTED_WRITTEN_BYTES)
Title: Re: Making Colloidal Gold with GC
Post by: kephra on December 18, 2014, 06:45:06 PM
Well you can obviously connect to this website, and i have never seen that error message before, so I suspect the error is outside the scope of the forum.
Title: Re: Making Colloidal Gold with GC
Post by: mrb123 on December 18, 2014, 06:47:29 PM
Perhaps it's my browser (Mozilla) I will try another one later. Thanks
Title: Re: Making Colloidal Gold with GC
Post by: Prince Angel on December 18, 2014, 08:04:23 PM
The one on the left looks correct.  The one on the right looks weak, and/or it doesn't have enough reducing agent.

I suggest adding a few more drops of sodium carbonate and some more maltodextrin to see if it darkens.

mine looks like the one on the right ("weak") and you stated to add "a few more drops of sodium carbonate".... I'm using the electrolysis method, would you still recomend using s carbonate and how much if making 500 ml batches? i use S. citrate, salt, and corn syrup, or do i have to add anymore of the 3 i just mentioned to make it darker?
Title: Re: Making Colloidal Gold with GC
Post by: kephra on December 18, 2014, 08:06:31 PM
Im confused because this entire thread is about making colloidal silver with gold chloride, not electrolysis.
Tell what exactly are you doing, so I can help you better.
Title: Re: Making Colloidal Gold with GC
Post by: Prince Angel on December 18, 2014, 08:16:22 PM
Im confused because this entire thread is about making colloidal silver with gold chloride, not electrolysis.
Tell what exactly are you doing, so I can help you better.

ahaha sorry, i did not even notice, i have been trying to ask that question and felt it was the right time since the pics above show 2 different batches which i want to fulfill (left)...

How can i make it darker and not as the pic in the right which was weak? more time, citrate, syrup, salt???

thank you and sorry again..
Title: Re: Making Colloidal Gold with GC
Post by: kephra on December 18, 2014, 09:41:25 PM
Run high current until you get no more color change.  The amount of gold is determined by the amount of salt, and the process stops when all the sodium chloride has been converted to sodium hydroxide.
Title: Re: Making Colloidal Gold with GC
Post by: Prince Angel on December 18, 2014, 10:27:33 PM
so is it safe to add more salt and let run for longer so the process of sodium chloride has been converted to sodium hydroxide?
Title: Re: Making Colloidal Gold with GC
Post by: kephra on December 18, 2014, 10:42:26 PM
Yes, but if you followed my formulas for electrolysis, you really shouldn't have to add more.  You probably don't have enough current.
Title: Re: Making Colloidal Gold with GC
Post by: Prince Angel on December 18, 2014, 10:45:04 PM
could be the problem for sure...i will try to increase the current next time by adjusting the anode position and how much i have in the water... is it a good idea before starting to add more salt?
Title: Re: Making Colloidal Gold with GC
Post by: kephra on December 18, 2014, 10:52:53 PM
Make your cathode large, and you anode small.  I was always able to get 250ma or more with my 36 volt power pack.  You want a lot of current per area of your anode.  If you can't get the current up that high, move them closer together.  Increasing your wetted anode works against you.
Title: Re: Making Colloidal Gold with GC
Post by: mrb123 on December 22, 2014, 05:15:15 AM
Perhaps it's my browser (Mozilla) I will try another one later. Thanks

(http://)

Aha, once I switched from Mozilla browser to Internet Internet explorer, the pic loaded.
The picture is very poor from my phone, but I am pleased with this first batch.
Title: Re: Making Colloidal Gold with GC
Post by: kephra on December 22, 2014, 12:38:16 PM
Yep, you have colloidal gold! 
BTW, I only use Firefox, and pictures upload ok.  Perhaps there is something else different.