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Pink Gold :: Pink Gold Alloy :: Pink Gold Jewelry :: Pink Gold Jewellery

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Pink Gold :: Gold and Copper Alloy

The difference between pink gold, red gold and rose gold is the copper content. The higher the copper content, the stronger the red colouration. A common alloy for pink gold is 75wt% gold, 16wt% copper, 9wt% silver by mass (18 carat, karat).

Carat
Silver
Copper
Colour Produced
9 ct
62.00%
NIL
White
9 ct
55
7.5
Pale yellow
9 ct
42.5
20
Yellow
9 ct
31.25
31.25
Rich yellow
9 ct
20
42.5
Pink
9 ct
7.5
55
Red
Gold alloy mixes for 9k gold alloys

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Pink Gold Alloy

Pink gold is also known as rose gold or red gold. Although the names are often used interchangeable, the difference between red gold, rose gold, and pink gold is related to the copper content in the gold alloy.

The lower the copper content the more subtle the pink hue. Pink gold will therefore vary quite a bit as copper is reduced and other admix metals are increased in the gold alloy mixture.

Pink Gold :: Electro-deposition

Electrodeposition of a hard, bright, pore-free ductile gold alloy having a pink coloration, useful for decorative purposes, is effected using an aqueous cyanide-free electroplating bath essentially comprising:

  • from 4 to 20 g/l of gold
  • from 0.1 to 3.0 g/l of .copper
  • from 0.2 to 5.0 of palladium
  • from 5 to 200 g/l of free sulphite ion
  • from 0 to 150 g/l of one or more buffering agents and / or conducting salts
  • from 0.001 to 0.5 g/l of a brightening element such as arsenic, antimony or thallium.

With this in place, electro-deposition of the pink alloy can be carried out. The bright, hard gold alloy deposit having a pink colouration is a gold : copper : palladium alloy in which the elements are present in parts by weight ranges of:

  • 86wt% to 94wt% gold
  • 8wt% to 2wt% copper
  • 6wt% to 2wt% Palladium
  • the best mix being 88wt% to 90wt% gold, 8wt% to 7wt% copper, -4wt% to 3wt% palladium

Generally the alloy contains more copper than palladium.

Bright gold alloy deposits having a pink coloration are generally difficult to obtain because of the presence in the bath of copper, which is the main alloying metal producing the pink colouration.

Pink Gold Electro-plating

Pink Gold Plate
Gold (Au) wt%
Copper (Cu) wt%
Palladium (Pd) wt%
Bright & pink
88
8
4
Bright & pink
90
7
3
Bright & pink
91
4
5
Bright & pink
94
2
4
Pink gold electrodeposition

Pink Gold as a Product :: Pink Gold in Jewellery

Although pink gold, rose gold and red gold are often used interchangeably there is solid evidence that the three names for gold alloy with predominantly copper content can be distinguished colour-wise.

Pink gold is at the lower end of the scale with regards to copper content of gold alloys produced for commercial jewellery manufacture.

Pink gold is a subtle shade in the red spectrum and is well-matched for selection when considering bi- or tr- colour combination in jewellery products. Combinations such as these highlight the colour differences, not only for the three sub-red gold alloys but against coloued gold alloy in general.

The beauty of pink gold is in it's subtlety of colour hue.

Pink gold can be found in most gold alloy grades.

Don't forget you can purchase a piece of pink gold jewellery at:

Pink Gold Jewellery

For further information on gold alloy grades / fineness / purity, see Gold Grade by Humagaia

For further reading on Gold Colours see Gold Colours :: Gold Colors by Humagaia.

To read the next article in this series see Gold :: Red Gold by Humagaia

To read the previous article in this series see Gold :: Green Gold by Humagaia

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Gold Hubs by Humagaia

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Others are also reading...

agvulpes 17 months ago

Interesting information I will bookmark this for future reference :-)

humagaia 20 months ago

Leanman - well you know what to do, and you know where you can go to get something in this pretty shade of pink.

LeanMan 20 months ago

My wife would love this colour of gold, thanks for the hub.

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