Strange incident when washing metal models

[dougaderly]

Heh... Am I the only one who washes all their minis?

Never had orange spots appear. Now, to rule out the obvious, you\'re sure it wasn\'t orange spots on your eyes and not the minis? that could be a more serious problem!

 

[funnymouth]

Originally posted by Ritual
Now I need to find a philosopher who promotes empiracal induction!

philosopher? bah. mathematical induction has been used to proove theorems for thousands of years - theorems that make your computer functional.

how about all of science? we gather many specific instances and amalgamate them in to a series of principles or general laws.

as for the dots, definately some sort of oxidation.
i like to wash my minis too, or they smell bad after s......
i mean, ive had problems with releasing agent before.

 

[RedSevenBlue]

Originally posted by airhead
Although minis cannot rust, they can corrode (oxidize). The old lead minis were suseptable to lead rot (ever seen the terminals on an old car battery?).

Tin also corrodes - albet slowly. Moisture always accelerates corrosion. Washing your minis may help remove any finger oils or other things accumulated during the scaping/assembly process, but be sure they are dry before you prime them. Trapping moisture under the primer is a sure bet to paint failure later.

And interesting article on tin and lead
http://nautarch.tamu.edu/class/anth605/File14.htm but I don\'t think most of us worry about our minis lasting for the next 1000 years.

I DO! I WANT TO BEAT GOD IN A GAME OF 40K! Excpet if that happens, he\'ll probably get angry and put GW out of buissness or melt my minis. lol

@Ritual - Gold deteriorates, like everything, and when it deteriorates, it turns black.

 

[marineboy]

Gold deteriorates? This must be something new. Since when?

 

[Xavier]

Okay I\'m guilty

I do wash my metal figs.

For RnF then I spend only a few seconds with a Dremel, Wire Brush and Green stuff.

For master classics I spend more time and cleaning and prepping the miniature.

Washing the mini really isn\'t about paint adhesion, though it might help. For me it\'s really about surface prep. Metal tends to be porous and uncleaned mini hides the pours surface from the eye but will show up during the paint process. Once clean I can determine if I need to sand the surface down or just apply a wash of magic sculpt to smoothen the surface.

Life experience has taught me, regardless of application, the better the prep work, the better the final result.

 

[Ritual]

Originally posted by marineboy
Gold deteriorates? This must be something new. Since when?

Never heard of it either. Gold is used in serious hi-fi cables and connectors just because it doesn\'t oxidise.

 

[RedSevenBlue]

Originally posted by marineboy
Gold deteriorates? This must be something new. Since when?

it deteriorates very very slowly. I was just told this, so don\'t shoot the messanger, but it usually happens in salt water, takes a very very long time. You every watch tjose history channel specials? look at the coins from the bottom of the ocean, they have holes in the and they are no longer shiney and when scrubber, they com back out black sorta.

 

[Xavier]

Originally posted by Ritual

Originally posted by marineboy
Gold deteriorates? This must be something new. Since when?

Never heard of it either. Gold is used in serious hi-fi cables and connectors just because it doesn\'t oxidise.

Actually it\'s used because it is a great conductor of electricity. There are a lot of free electrons in Gold. ( I suppose that is why gold is soo expensive okay bad joke)

Gold does oxidize just not as fast as other metals

 

[Ritual]

Gold is the most stable of all metals (even in water or moist air). In fact, gold oxides are unstable (they can be produced under extreme conditions) and reduces back to pure gold pretty quickly.

http://matsci.uah.edu/courseware/mts501/reports/sschwitalla.html

EDIT: @Xavier: Yes, but the reluctancy to oxidise is another reason to use gold. Less valuable metals have sufficient conductive qualities, but oxidise pretty quickly.

 

[Avelorn]

To clarify: Gold does not react with the atmosphere, same with platinum. They can however react with other substances.

 

[Ritual]

Gold can be dissolved in a mixture of hydrochloric acid and nitric acid. That\'s the only substance I\'ve heard of that can deteriorate gold under any kind of normal conditions.

 

[Avelorn]

Originally posted by Ritual
Gold can be dissolved in a mixture of hydrochloric acid and nitric acid. That\'s the only substance I\'ve heard of that can deteriorate gold under any kind of normal conditions.

Namely aqua regia.. *teachers pet* come one give me a golden star! p-p-please!

 

[Ritual]

Originally posted by Avelorn

Originally posted by Ritual
Gold can be dissolved in a mixture of hydrochloric acid and nitric acid. That\'s the only substance I\'ve heard of that can deteriorate gold under any kind of normal conditions.

Namely aqua regia.. *teachers pet* come one give me a golden star! p-p-please!

You probably googled it, but...

... here you go!

 

[Xavier]

@Ritual: Right you are. For applications where oxidation is a concern gold plated connnectors are used and the rest of the metals is sealed with plastics.

For the applications where quality signals are desired, like high end audio, they still use gold wire, but pay a premium.
Of couse now there is a shift to use fiber optics wiring that are light years ahead of gold ... get it \"light\" years lol .. ah never mind) With Fiber optics you don\'t have rust nor noise signal, close to metal.

Incidently platnum is still even better than goldbut just too expensive. High end micro chips use platnum

 

[SebastianRushworth]

Ritual: See, all those years you spent getting a degree in physics weren\'t wasted

 

[desertdragon1964]

Not measles it is CHICKEN POX run as fast as you can, no wait I am thinking of the bird flu.DDlollollollol

 

[Ritual]

@Xavier
A couple of days ago I saw fibre optic cables with gold shielding! I don\'t see what the gold shielding is actually good for, but there\'s always someone willing to pay for it, I guess.

@Seb
Yeah, I knew it would come in handy some day! Now I feel fulfilled!

 

[Avelorn]

Originally posted by Ritual
You probably googled it, but...

ptssch! I would never...

admit that.

Actually i learned the term \"Kungsvatten\" or \"royal water\" from Donald Duck!

 

[No Such Agency]

Originally posted by Ritual
@Xavier
A couple of days ago I saw fibre optic cables with gold shielding! I don\'t see what the gold shielding is actually good for, but there\'s always someone willing to pay for it, I guess.

Brilliant! A surefire way to make buckets of $ off of the less-intelligent segment of \"audiophiles\". Though IMO audiophiles in general are pretty gullible if they think they can hear the difference between a $1200 stereo and a $3000 one... or that the diference is worth $1800

 

[hashmallum]

Oi!

As far as I was taught in my primary , and as far as I know neither tin nor lead can rust red chaps , while oxidizing they get patina or verdigris thus become green or grey

As simple as this

You should wash your minis not even because the mold release agent , but also because as you touch the mini while assembling, you leave some sweat (from your fingers) , making the primer peeling off the mini