August 9, 2012

USA, 1880s: Dental Platinum Alloys

DSQ
c.1880s:

In France, "Platinum alloy" with less than 35% Pt was called 'platine au titre' - different dental Platinum alloys by standard weight ranged from 45-66% Pt.

1)  Pt 66.67% / Au 22.22% / Ag 11.11%
2)  Pt 58.33% / Au 16.67% / Ag 25%
3)  Pt 41.67% / Au 25% / Pd 33.33%

Citation: The Metallic alloys: a practical guide for the manufacture of all kinds... William Theodore Brannt (1889)
 


1880: 1 Troy Ounce Platinum (Mkt: Semi-Mfg)  = USD$ 7.97
1881:  1 Troy Oz. Platinum (Mkt: Semi-Mfg)  = USD$ 8.69
1882: 1  Troy Ounce platina (semi-refined) =  USD$ 6.
1883: 1 Troy Ounce of Platinum = $ 10.29

1883: 1 Troy Oz Platinum (refined, mfg, whols./import) = USD$ 6.50 - 7.50
 
c.1884: 1 Troy Oz. of Platinum (disputed low, US ore?) = $  3.- 5. 
c.1884: 1 Troy Oz. of Platinum (semi-refined, retail) = $  8. 
 
c.1884: 1 Troy Oz Platinum (refined, mfg, retail) = USD$ 10.89 - 14.
1884: 1 Troy Oz "Platinum" (generic range: all types) = USD$ 8. - 12.
1884: 1 Troy Oz Platinum (refined, mfg, whols./import) = USD$ 7.50 - 8.50


1886:Troy Ounce Platinum (unmanufactured) =  USD$ 6.
1887:Troy Ounce Platinum (unmanufactured) =  USD$ 7.50
1888:Troy Ounce Platinum (unmanufactured) =  USD$ 6.80
 

1889: 1 Troy Ounce of Platinum = $  8.
October, 1889: 1 Troy Ounce platina = USD$ 17.50
March, 1890: 1 Troy Ounce of Platinum = $ 14.
October, 1890: 1 Troy Ounce of Platinum = $ 20.

 1911; 1918:

1)  White Gold:  ..........................Pt 40% / Au 60%
2)  Cooper's Gold (1) : ......................Pt 18.75% / Cu 81.25%
3)  Cooper's Gold (2) : ......................Pt 29.17% / Cu 66.6% / Zn 4.15%
4)  Cooper's Pen Metal (1) : .............Pt 50% / Ag 37.5% / Cu 12.5%
5)  Cooper's Pen Metal (2) : .............Pt 50% / Ag 37.5% / Cu 12.5%
6)  Cooper's ("Platina") (1) : ............Pt 25% / Ag 70% / Ni 5%
7)  Cooper's ("Platina") (2) : ............Pt 0% / Ag 70% / Co 5% / Pd 25%

 


Platinum Alloys, generally (cited prior to 1890): "Cooper's Pen Metal"

c.1889:


1888:



c. 1830?
   

c. 1820:


c.1890: Dental Alloy

Platinized Silver Plate was recommended 80% Ag, 20% Pt; Platinized Silver Wire
66.7% Ag, 33.3% Pt



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