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#107008 - 07/07/03 07:15 AM Re: New colour word
of troy Offline
Carpal Tunnel

Registered: 10/17/00
Posts: 5400
Loc: rego park
I didn't know arsenic could also be used to make yellow pigments.

There is a famous arsenic green pigment, that was used in inks, and to color wallpaper. the arsenic ink would slowly dry out, and fall as dust, and the cleaning a room with arsenic green wall paper would be toxic!

Uranium salts make a beautiful yellow, at least in glass. there are some samples in the Corning glass museum, and some old feista ware dishes used uranium in the glazes.

Its not enriched uranium, so the radio activity level is very low.. but still measurable.
It is a very brillent yellow shade.

(there is also a sci-fi short story about an alien world, and famous potters, who make use of uranium for glazing some pottery.)

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#107009 - 07/07/03 08:51 AM Re: awe and amazement
Buffalo Shrdlu Offline
Carpal Tunnel

Registered: 06/24/02
Posts: 7210
Loc: Vermont
I beginning to think that there isn't anything that somebody on this board doesn't know... cool.

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#107010 - 07/07/03 09:09 AM Re: New colour word
Bingley Offline
Carpal Tunnel

Registered: 04/09/00
Posts: 3065
Loc: Jakarta
In reply to:

There is another form of yellow, Orpiment. This is a mineral; I cannot remember the chemical compound but it has arsenic and is therefore rarely used. There is a rare, exotic and ceremonial fabric (or is it a costume) in Indonesia, that is dyed almost exclusively with Orpiment. Do you know more about this?


'fraid not, no.

Bingley

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Bingley

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#107011 - 07/07/03 12:28 PM Re: New colour word
wwh Offline
Carpal Tunnel

Registered: 01/18/01
Posts: 13858
Orpiment is As2S3 Arsenic sulfide.
http://mineral.galleries.com/minerals/sulfides/orpiment/orpiment.htm
Forgive me for being lazy about making short link.


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#107012 - 07/10/03 05:59 AM Colorado
consuelo Offline
Carpal Tunnel

Registered: 06/11/01
Posts: 2636
Loc: Caribbean
In reply to:

and in spanish is a bit closer, with colorado being 'red river'


Just thought I'd pitch in my two pesos here. Colorado is indeed a river that runs through the Rocky Mountains and gives name to the state, however, the word colorado, from the verb colorear (to color), means "colored, tending towards red" or "beet red, red as a lobster, redfaced, blushing, etc."


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