Especially skin sweat is a problem here. Depending on the individual, it can be very aggressive and attack and eat away at the copper. I like to use Ag/Cu here because it is relatively inexpensive. And it is possible for me to demonstrate the possibilities of design. It is also a very good combination of materials to learn from. Otherwise, in the case of art objects, no change can be observed here, even after decades.
@@mokumegane yes, it's the sweat that provides the electrolytes to "power" the galvanic cell.. there are other Makers who have videos that explain the science and show the results.. An art piece will last, I'm glad because the forging is exquisite
@@Faesharlyn I would like to learn more and understand the subject better. Can you link some of these videos that explain the metals/coats etc ? Thank you
@randomdyfbrn If you google Why you don’t want a copper and silver mokume gane ring It'll bring you to James Binnion Metal Arts, he wrote a fantastic explanation and you can decide from there where to look for more info if you like.
Danke! Generell verwende ich renaissance wax zum konservieren von Oberflächen von Buntmetall. Kupfer ist bei Schmuck so eine Sache. Je nach individuelle Hautchemie kann der Schweiß es sehr stark angreifen und regelrecht wegätzen. Das ist von Mensch zu Mensch wirklich sehr unterschiedlich. Zum Üben oder wie hier um einen Vorgang zu demonstrieren ist Ag/Cu jedoch perfekt. Es ist relativ günstig und einfach zu verarbeiten. Aber schützen tue ich die Ringe nicht weiter. Ringe werden auch sehr hoch belastet. Kommen ständig mit deutlich härteren Oberflächen und mit Chemikalien in Berührung. Da hilft sowieso keine Schutzschicht.
Question: At 7:26 couldn't you pass a metal nail file between the two joints to get the thinnest joint possible or do you need a rough surface for the solder?
It doesn't need a rough surface. The surface should be clean and the ends should be as close together as possible. But the solder needs a little gap to flow (capillary effect). But you can do that a little better than I did in this example. The soldering gap is a bit wider here than I would have liked.
It is important to get a feeling for the different material combinations. When the material becomes spring hard is a good time to soft anneal it. With silver & copper, the son is reached at 25% conversion. I really go by feel.
When twisting and bending by hand you can feel the metal start to "creak" as it crystallizes and starts to fracture.. while hammering you might be able to listen to the change in pitch and feel the difference in the recoil as the metal gets harder.. it's so much down to experience and learning how the materials work. You can really see how springy it gets when he's rounding it.. and that's some great precision hammer work!
The blanks are produced on modern sinter presses. I work here with another company on the development of semi-finished products. Even if you only see me, it's actually a whole team that deals with it. If it turns out I'll make a video of it.
@@mokumegane oh okay, that's nice, but it would be nice to see how they welded the copper and the silver. Hot brazing? Or forge welding? But forge welding copper is quite a pain so seing the process would be super interesting
@@jeanladoire4141 Using diffusion welding. In German we say "bonden" to the process. The sheets come in a graphite mold and these are placed in a sinter press under a protective atmosphere. Here, water-cooled stamps constantly exert high pressure over several hours at the right temperature on the metal sheets. The sheets connect. A costly process, but with excellent results. This means that not only sheet metal but also powder, granules, wires,... can be processed. And also materials such as titanium, ceramics, glass,... For example, the ring blanks here are made of titanium and silver granules: mokume-gane-shop.at/collections/silber-titan-1/products/ringrohling-titan-silber
@@mokumegane impressive technology, i've heared of it used in aeronautics parts... So as i suspected, forge welding (the modern version of it, where the forge is replaced by a furnace, the flux by inert gas and the hammer by heavy presses). No wonder why the result seems flawless! Thanks for the info! I'm a bladesmith and i'm experimenting with a lot of new metallurgical processes (i'l trying to find new forms of damascus, kinds that have never been made yet). Do you think i can contact the engineers you work with and ask them about my project?
yes it is also at the limit. you can feel that. without the prism jaws it would turn off. So just above the point where it would be clamped in the vise. Happened to me of course.
Since my English is not so good, I use a translator. I'm not sure if I understand what you're asking. Do you mean the overlaps from twisting? If you structure a sheet too deeply, it can also be that the edges lie over it. looks like a crack but it isn't. You have to be alert and keep an eye on all of this.
@@jmullens90 There are no cracks there. The layers are firmly and coherently connected to each other. In principle, a patina always forms when it comes into contact with atmospheric oxygen. That is also very desirable. But what you don't want is verdigris. It develops on contact with the salt of acetic acid.
The semi-finished products for sale are produced in large slabs on sinter presses. I would like to show in the videos what you can do with the already finished semi-finished products. Just as a suggestion. We manufacture panels of 150 x150mm. Also individually layered according to your needs: mokume-gane-shop.at/collections/massgefertigtes-halbzeug-neu You get a lot of rings out of it and that's why this process is not shown here. And not in all other videos either. Thanks for the input I will explain that in the future in the description. Here: ru-vid.com/group/PLhm0YW70I3mgkDeYIRn0_xRl4yR-Y2_mr I show you in great detail how to weld Mokume Gane in a simple way. It's in German (since my English isn't good enough for that) but it should be okay with subtitles.
Thanks. There are already customers who like to wear such rectangular ring shapes. But the reason I make the rings like this in the videos is that I just want to show the pattern making process. I manufacture semi-finished products from Mokume Gane and would like to give suggestions here.
