Reaktionslöten

10:23 Sep 13, 2015
German to English translations [PRO]
Tech/Engineering - Mining & Minerals / Gems
German term or phrase: Reaktionslöten
The text is about the restoration of a golden piece of jewelry.

"Der Farbunterschied der beiden Teile erklärt sich daraus, dass die Ornamente und die Granulation mit Reaktionslötung aufgebracht wurden."

I have found various processes that might fit during my research but I am not quite sure, what the exact translation of "Reaktionslöten" would be. I hope someone can help.
Julia121
Local time: 07:24


Summary of answers provided
3 +1reaction solder
Allan Jeffrey
3colloidal (eutectic) soldering
Kim Metzger


  

Answers


2 hrs   confidence: Answerer confidence 3/5Answerer confidence 3/5 peer agreement (net): +1
reaction solder


Explanation:
Hi there, I think the term reaction solder is the one you are looking for.
I going to add a link, I hope this helps.
Greetings

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Note added at 2 hrs (2015-09-13 12:55:40 GMT)
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It should say: I am going...sorry!


    Reference: http://www.jewels-gems-clocks-watches.com/gemdict_en/index.p...
Allan Jeffrey
United Kingdom
Local time: 06:24
Native speaker of: Native in GermanGerman, Native in EnglishEnglish

Peer comments on this answer (and responses from the answerer)
agree  philgoddard
1 hr
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2 hrs   confidence: Answerer confidence 3/5Answerer confidence 3/5
colloidal (eutectic) soldering


Explanation:
Anschließend kommt das Werkstück in einen Ofen und die Temperatur wird langsam gesteigert. Bei ca. 100°C verwandelt sich da Kupfersalz in schwarzes Oxid, bei 600°C verkohlt der Leim und bei etwa 850°C erfolgt die durch die Kohle bewirkte Reduktion des Kupfersalzes zu metallischem Kupfer. Bei 890°C legieren sich Gold und Kupfer und es entsteht eine feste Verbindung. Dieser Vorgang wird als Reaktionslötung bezeichnet.
http://goldschmiede-plaar.de/2013/03/08/granulieren-technik-...

Colloidal or eutectic soldering is a technique that makes use of a colloidal mixture of organic glue and copper salts such as cupric carbonate or copper coating granules. This compound lowers the melting temperature of the two metals in contact (the granules and the base) after which the copper diffuses into both at the point of contact when fired in a reducing atmosphere. The glue burns away releasing the copper salt from the compound. The copper diffuses into the granules and the base linking them together.
https://jewelrystudiesintl.wordpress.com/2012/02/29/what-is-...



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Note added at 2 hrs (2015-09-13 13:21:32 GMT)
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Probable technique: In the early 20th century, jewelers determined the ancients probably used a technique known as colloidal (non-metallic) hard soldering or fusion welding. Essentially, the process involves mixing an organic glue (perhaps fish paste or cowhide glue – both known to the ancients) with a powdered copper mineral (possibly malachite) and using it to fix grains of gold in place on the gold sheet. When the prepared piece is heated in a reducing atmosphere (where there is little or no oxygen present), a chemical change occurs between the glue and the copper oxide.
http://www.jckonline.com/1995/05/01/granulation-reviving-anc...


Kim Metzger
Mexico
Local time: 00:24
Native speaker of: Native in EnglishEnglish
PRO pts in category: 33
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