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careysub
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A Felix Felis pendant would be nifty gift for my wife as well (big Rowling fan).
I am looking at this technique:
http://propnomicon.blogspot.com/2010/06/making-magic-potion....
which is powdered mica suspended in a colored fluid. It appears that a good gold color can be had from tinting yellow food coloring with a bit of
brown food coloring.
If you have no brown food coloring red, yellow, and blue make brown - so then go heavy on the yellow to golden it up. I am also thinking of adding
glycerin to thicken it if that seems to make a good effect.
I see that many colors of dyed mica are available as well. I ordered some gold mica from eBay.
[Edited on 25-11-2014 by careysub]
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MrHomeScientist
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Also a good idea! Though it does settle over time. I wonder how quickly? Mixing it into a thicker liquid should help.
I just had a thought: what about mixing the colorants (whatever they may be) in with clear casting acrylic? That would lock the particles in place at
the cost of it not really being a 'potion' any more, but would still have the desired appearance.
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Amos
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Depending on how fine the particles are, settling might not be an issue. This is meant to be worn on a moving person, not sat on a shelf.
Oh, and while it may not be all that shiny, you can add excess(not sure what the ratio or reaction is) ascorbic acid to a solution of copper sulfate
and heat it to form a yellow complex. Adding dilute sodium hydroxide solution to the yellow complex precipitates golden-yellow hydrous copper(I)
oxide, which can be seen in suspension in the second picture here: http://imgur.com/a/3Mjq4
The precipitate is so fine that it takes several hours to settle again. It can't be dried or allowed to stay in the air long, or it will turn brown.
But that sample pictured has been in a vial for months, so it's stable there.
[Edited on 11-25-2014 by No Tears Only Dreams Now]
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bismuthate
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I wonder if there are any liquid gold alloys. Galinstan and gold perhaps?
Or you could give your girlfriend NaK. Seems safe
[Edited on 25-11-2014 by bismuthate]
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j_sum1
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Good idea. I am going to look up galinstan copper when I get a chance. That could be really cool if it worked.
J.
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Etaoin Shrdlu
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Quote: Originally posted by jock88  | If you purchase 'gold paint' in a paint shop it will make quite nice golden liquid when mixed with white spirits.
It is very fine brass I believe, how exactly it's made is protected. |
It's not protected. They dry mill brass with stearic acid as a lubricant.
If you're interested, what you're going to want to look up is gold-bronze, as that's generally how the pigment is known.
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aga
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Faced with a gold-coloured thing or actual slabs of Gold, i know which my wife would prefer.
She has horses, so maybe horses eat Gold.
Oh. I remember now. Yes they do, rapidly.
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careysub
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While we are discussing possible gold alloys in connection with popular entertainments - I thought I might mention the scene in Season 1 of Game of
Thrones where Daenerys's brother Viserys got his head dunked in molten gold.
When I saw that, I felt that the gold melted way to fast, and wasn't realistically hot enough - gold melts at 1064 C which is a cherry red glow, and
the molten metal was not glowing.
But then I looked up what the lowest melting point gold alloy was, and was surprised to find that 80% Au/20% Sn (basically making it "gold bronze") is
a eutectic alloy with a melting point of only 280°C!
It is sold as gold solder for electrical applications.
I don't know if anyone in the ancient world made this alloy, but they easily could have. It is hard and brittle, but it can be used to make cast
objects.
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bismuthate
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aga, words cannot describe how drunk you are. Write your thoughts down and laugh at them later.
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aga
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In the context, there are Chemistries other than Academic at play.
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Jylliana
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I'm wondering, MrHomeScientist, what did you go for in the end? So many suggestions and I'm curious, and I kinda demand a photo 
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MrHomeScientist
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No progress yet I'm afraid. Very busy week and weekend for work. I'm hoping to have something together by her birthday next month or Valentine's day!
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MrHomeScientist
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Well a lot of things have happened in the interim, so I haven't been able to devote the time I wanted to this project. I attempted to make ferrous
ammonium phosphate last night, and it didn't turn out anywhere near as pretty as the picture (last post on this thread: http://www.sciencemadness.org/talk/viewthread.php?tid=14644&... ).
(Disclaimer: Very experimental below, so I didn't measure anything.)
My first attempt was done by first dissolving iron powder in phosphoric acid, then dropping in concentrated ammonia solution. This formed a greenish
grey precipitate. I then tried oxidizing the iron to produce a different color (new test tube) - I added 3% hydrogen peroxide after dissolving the
iron, heated to boiling to decompose any extra peroxide, then added the ammonia. This produced a dull yellow powdery precipitate. Closer, but still
nowhere near as nice.
So it appears that platedish29's compound is ferric, rather than ferrous, and he must have made it differently. I'm going to try heating to see if
anything dissolves and precipitates into glittery plates upon cooling, ala the golden rain demo, but I don't really expect that to pan out. If anyone
knows of a better way to make this compound, I'm all ears!
[Edited on 2-9-2015 by MrHomeScientist]
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blogfast25
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| Quote: Originally posted by MrHomeScientist | So it appears that platedish29's compound is ferric, rather than ferrous, and he must have made it differently. I'm going to try heating to see if
anything dissolves and precipitates into glittery plates upon cooling, ala the golden rain demo, but I don't really expect that to pan out. If anyone
knows of a better way to make this compound, I'm all ears!
|
I'm not sure how you could have concluded the golden platelets could have been anything other than ferric in nature.
I've obtained something quite similar from concentrated Fe2(SO4)3 solutions. pH control is crucial here, as is probably overall ionic strength of the
solution.
But definitely not easy to obtain...
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Eddygp
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I'm thinking about a specific concentration of iron(III) chloride
there may be bugs in gfind
[ˌɛdidʒiˈpiː] IPA pronunciation for my Username |
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numos
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Sorry to revive an old thread, but would it be possible to create a gold-mercury amalgam? Something like this? I'm interested as most of the
suggestions create solutions and watery type results, to create something more liquid metalish, with high surface tension and almost no adhesion, this
seems viable.
https://i.ytimg.com/vi/GguoKun9wbU/maxresdefault.jpg
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elementcollector1
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| Quote: Originally posted by numos | Sorry to revive an old thread, but would it be possible to create a gold-mercury amalgam? Something like this? I'm interested as most of the
suggestions create solutions and watery type results, to create something more liquid metalish, with high surface tension and almost no adhesion, this
seems viable.
https://i.ytimg.com/vi/GguoKun9wbU/maxresdefault.jpg |
Well, yes, but then you'd have to deal with mercury. Not to mention finding enough gold to make a good color difference. Not sure how much it takes,
or if the color scales proportionally to the concentration.
This isn't a bad idea, if you already have the above and something to ampoule it in. It would certainly make for a more permanent and 'golden'
specimen.
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pneumatician
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good?
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elementcollector1
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That's yellow, not golden...
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pneumatician
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is your pro monitor corrected with a hardware color calibration device???
is your icc profile loaded? the light in the room is the appropriate??
if all ok, don't be ludicrous, the pic is shot with a cheap mobile phone 
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