ARGH Ek kan imagine-- my suster doen ook jewellery design as 'n skool vak, hulle werk net met koper though... Ek verkies dit as sy rooikoper goed maak :3 Dis mooier as geelkoper, ook omdat ek nie geel metale kan dra nie...
thanx for the link on steam casting!! I am gonna try that!! and yes 9k rose gold! Its actually the same thing! A carat is a measure of weight, 9k gold is 9 parts gold 15part silver, copper and what ever else the supplier want to add! We use the ct as an overall thing! it changes depending on what is behind it! 2.15ct garnet, or 9ct white gold! but your american way sounds like it could solve a lot of confusion!
Yes, the k and ct are different here. But, unfortunately the US has made anything less than 10k illegal to sell as a gold alloy. I am an outlaw by these standards. I occasionally use a 2-3k alloy, which is a Japanese alloy that patina's to a nice purple. I just use the Japanese name for it instead of calling it gold.
But, the ct threw me off
Give steam a chance. It beats bringing in all of that expensive equipment. And, he is right about using the investment without de-bubbling. It makes the investment more porous, which is better in that it allows the steam to penetrate the casting better. Just three taps, not more, no less I would think it to be better for vacuum as well. I also just burnout directly as he explains, and it works great. I can go from wax to polishing the metal in less than a full work day. It beats doing an extensive burnout, stepping it up and such.
Shakudo? the alloy? lovely stuff! wiil post some pieces later in the year! there is another alloy which you may want to try! shibu-ichi! sister to shakudo but with silver. very nice grey tone! The fact about the 10k is intresting! most of the jewellery in RSA is 9k and 18K 14K is very rare, and 10K unheard of!
I am concerned about the pot as a kiln! for burn out? is it safe? and what pot to use?? those red cceramic unglased ones??
10k is rare here too. We see more 12, 14, 18, & 22k. Cool, then you are familiar with these. I use them both frequently. I have a new way to alloy these without getting oxidation. I pump argon into my furnace, and it has worked well for me. Copper is such a slut for oxygen But, I love her anyway, lol.
You may be interested in this. I have found that if I add a pinch of zinc to my copper, that it reduces her demands for oxygen and prevents it from wanting to tarnish, similar to a galvanization. But, you may not work with copper much. I learned this from using old printmaking etching plates. It also reduces the risk of blackening on people's skin, but I still don't create much work that ever has the copper touch skin, except for a few pendant designs, where the copper hangs free (never on a ring or bracelet).
I have tried it twice, and it works!!! Use a terracotta pot. Mine never broke, but if it did the foil prevents it from ruining the work. I use my kiln now, but I wanted to do it to make sure that it would before recommending it. I want to try it with a class outside. It makes it nice that you don't have to use electricity at all. Give it a shot
ah the era of the plastic pots is apon us! the only ones I could find were too thick! at least thats what I thought. and the other ones had been glazed inside. but I will look around!
I cant wait to give it a shot! I have a contact that can give me some investment,(enough for three casts maybe) and I cant find our carving wax but will find some somewhere! and then I will post the piece up!
I am very exited about it!!!!!!! it just broadens our ability to do fun stuff!!