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Yay and bugger!!

Journal Entry: Tue Jun 30, 2009, 6:24 AM
The yay was I had really really extraordinary luck last night in class, no doubt due to the fact that I had a momentrabbit 's foot present (two as a matter of fact, happily attached to the bunneh himself). Moment came along to take measurements of the instructor's jewellers bench for future reference in assisting me finally having one.

Normally when a lost wax casting is made, the wax is placed in something called investment. Investment is like a plaster of paris substance that surrounds the wax forming a mould. The mould is then placed in a kiln and the wax is burned out (the lost wax part). Once the wax has burned out of the mould, molten metal can be injected into it, forming the silver piece.

Time, as I've mentioned, was running out. So we did a little cheatery and I invested the wax last night and then burned it out all in the same night. Normally the investment is left to cure at least over night, if not for a week between classes so the investment dries out thoroughly. I didn't have time for that. My casting failed last week, plus I had other bits that needed casting. At one point a loud pop was heard and then smoke started coming out of the kiln. Amy, the instructor, went over and opened the kiln and a look of dismay came over her face and she looked at me and said "You'd better look at this yourself."

The investment is poured into metal cylinders about 2.5" in diameter. One of my cylinder's was laying on its side, and I could clearly see that a good third of the investment had blown out around the edges. Because we'd put it in wet and when the kiln was already hot (rather than wet as the kiln was coming up to temperature), the moisture turned to steam and blew escaped in hasty fashion. Picture if you will a cylindrical apple...now more like a cylindrical apple core...with my wax in the middle where the pips would be. Amy left it in the kiln because we couldn't see how bad the damage was and it was still smoking, meaning the wax was still burning out.

I went about doing the other things that needed doing to get this piece done. And then it came time to cast. Sam went first. He was casting gold, and his casting turned out fine. I had invested one piece last week and so we went ahead and cast that while the other moulds continued to burn out in the kiln. I had to try three times, something one normally doesn't get the opportunity to do, you more or less get one shot and if it doesn't work you're pooched. The metal kept sticking in the end of the crucible. The apparatus for casting is a centrifuge swing arm and uses centripetal force to inject molten metal, from a specially designed crucible, into the hot mould which is held in line on the outside of the swing arm by a bracket. I had to make the hole in the mould bigger and finally the metal went in on the third try. The piece cast, but not well. So, partial success. It can be salvaged with some jiggery, and I'll use it for some piece that needs a beaten or old look as the metal is quite pitted.

Then we pulled out the blown up mould. I got Amy to turn the thing over and pull the cylinder off carefully and we discovered that there were no breaches in the hull into the core of the mould where the wax had been. So we went ahead and cast it. Part of the mouth of the mould was blown off too making the possibility of the metal spraying out quite likely. I really should have taken a picture of it as it was remarkable how much of it wasn't there. As she pulled the mould out of the swing arm apparatus, the entire bottom of the mould crumbled away. And the casting worked!! Amy kept saying "unbelievable!!" with an expression of incredulity and disbelief on her face. Even as an instructor with a ton of experience she seems to have bad luck with casting. White gold castings invariably fail for her for some unknown reason. She was pretty much beside her self that my devastated mould worked when some of her carefully crafted and seeming perfect investments have failed. And then I cast my third and final mould and it also worked. It had crumbled somewhat, but nowhere near as badly as the other mould.

The bugger of it was, I ran out of time and couldn't finish the piece. Hopefully, my friend Deborah will let me use some of the equipment in her studio to get this thing done. We've still no idea if the program is being cancelled and if not where it will end up.

  • Mood: Triumph
  • Listening to: the hum of my monitor
  • Drinking: coffee

Rose Quartz Crazy...

Journal Entry: Mon May 4, 2009, 8:49 AM
I went to Robert Hall Originals yesterday with a couple girlfriends. One friend does beading and the like and the other does silver work (and has her own shop in her backyard *envy*).

I needed a chunk of rose quartz to go with a couple other chunks of stone for the purpose of meditation. And suddenly I was on a Rose Quartz kick! I must have over 30 oval cabs of varying sizes of rose quartz now. I also picked up a string of square rose quartz beads and 4mm amethyst beads. The rose quartz cabs weren't stunningly deep colour or anything. In fact I tended to pick up the clearer pieces with clouds or streaks of rose in them.

So now, I need to make something with them. Let's see if I can come up with something good...

Also, I entered a little contest for the Open House at RHO. They asked people to identify the backdrop for their wire wrap jewellery. My guess was correct! $25 gift cert for the next time I'm there!

  • Mood: Lonely
  • Drinking: tea

Derailed...

Tue Apr 28, 2009, 11:20 AM
Two weeks into my silver class and I really have nothing to show for it. I think maybe I should have given this semester a pass. I did one piece two weeks ago. It was supposed to be a heart and three or four people independently looked at it and said "boobies!". :P So yeah, that one's getting melted down I think. And then I tried to redo it last night, and the thing miscast and I ended up with what looks like a pair of butt cheeks :P One of the other gals in the class said "Well, you got the t&a all covered, what next?".

Grrr.

Also, TAW has been derailed by personal turmoil. It may be spring but my heart and spirit are back in mid Jan :P

  • Mood: Depressed
  • Listening to: parrotlets and the PC fan
  • Drinking: tea

The Artist's Way...

Sat Mar 7, 2009, 11:57 PM
I've had the book, The Artist's Way by Julia Cameron for a couple years now. My niece Valerie first suggested I read it a few years ago, and I went out and bought it. Then I found an edition on sale that has The Artists's Way, Walking in the World and Finding Water all in one volume. I've been struggling with a lot of things, my mental health, my physical health, my emotional health and they all affect my creative health. Over the time that I've had these books, I've read through the first three chapters several times. I've always balked at the time commitment required. A half hour or so each morning and over the course of the week about 7-10 hours.

In essence it's a twelve step program to help unblock creativity or to discover creative renewal. But I've also noticed that the language and the concepts are very close to cognitive behavioural therapy. Even some of the language is like that of CBT. Traditional therapy, other than a stint with a baby Psychiatrist (an intern) I've not found therapy to be overall helpful. There has been a few things I've found helpful, one of which is just talking and finding where I have the problems. But I think, one of the exercises in the book, engenders a self dialogue and I might be able to get my questions and answers from myself.

It's a twelve step program, but it's also a twelve week program. Twelve weeks, at 10 hours a week, is a lot of time. I very rarely do anything that consistently. But I have done sketching that consistently at times, so I'm going to give this a shot. I've always made excuses, and that's what artists do, they make excuses for why they aren't being creative. "Oh when I'm making more money", "Oh when my relationship is in a better place.", "Oh when I'm feeling less crabby, less pissy, less ill, less stressed <insert excuse here>." I've heard myself make all these excuses and more. Apparently this program works for whatever creative process one is trying to get through (sculptor's, writers, painters etc). I don't think it's going to make me a better artist, but I think it's going to help me move through the excuses and give myself permission to create and be creative. I've all these books, I've all these materials, yet I consistently do less art than I have supplies for. Really. The scope of equipment and materials I have is pretty astonishing all put together. And I've little in actual artwork to show for it. Another excuse I've used on myself is "I really want to have a group of peers to go through this process with." Well, I have a group of artistic peers now through the folks I got together for Sketch'n'Kvetch and whether they join me in this guided course or not, doesn't matter. It only matters that I do it. I'll tell them about it, a few already know, and leave it up to them. I prefer company (hence the excuse to not do this for want of a group to do this with), but I can do it on my own too.

So I'm going to do this. I went out yesterday and bought myself a spiffy new journal in which to do the one exercise called "Morning Pages". First thing in the morning, as soon as the immediate needs are cared for (bathroom and tea for me most mornings), I'll be writing three pages of free flowing stream of consciousness writing. It's not meant to be fancy, or pretty, or anything I'm ever going to show anyone. It's just whatever comes to mind. Julia says in the book that even if I end up writing "I have no idea what to write." and fill up three pages of that, then that's what I have to do.

I've got a contract here that I'll be signing. It's a contract with myself and my inner artist to keep at this. And it's also a contract with myself to treat myself well, pamper myself, eat well, sleep regularly. I've not been doing much of that lately at all.

I'm hoping this unblocks more than just my creativity. I have hope.

Should be interesting at the very least.

  • Mood: Eager
  • Listening to: the hum of my computer

From Cuttlebone to Cast Piece

Wed Mar 4, 2009, 11:41 AM
Monday night, my friend Sassy_fae accompanied me to class both for the company and because I asked her to take some photos of me in the process of making a pendant. Some folk here had expressed some interest in how this was done. This then is for the curious.  

I chose to do this one in cuttle bone. Cuttle bone is the bone from the inside of a cuttlefish, which is a squidlike critter. The cuttlebone is a porous internal shell that helps control buoyancy, making it functionally similar to swim bladders in fish.

When I was a kid, my mum and I went to England and while on the shores of the Isle of Wight I remember seeing cuttle bones on the beach. Being a cute kid back then and customs having a bit more of a lax attitude for organic material, I was able to bring home several cuttlebones from that trip. I'm sure they eventually got fed to a budgie, but it was pretty cool to be where they washed ashore.

So, I started out with a whole cuttlebone.
 

The cuttle bone is cut in half and the soft side sanded flat so the two halves fit together face to face.


I happened to forget my sketch book and the drawing I was using as a guide so I had to use the last partial pendant I did as a guide. I was getting pretty good at carving this thing by this point, but I still didn't want to screw up, so I just took measurements again.


And then using the stencil as a guide, I started carving into the bone.


The carving is starting to take shape here.


Once the carving was complete I carved the sprue hole through which the molten silver would be poured. Sterling silver shot was weighed and put into a crucible.
 

An oxy-acetylene torch was used to melt the silver. I used a steel wire to bind the two halves of the mould together. The metal was melted and poured into the mould. Once the metal cools a bit and solidifies, the wire is cut away and the piece is quenched in water.


The process destroys the mould so these pieces are nominally one of a kind. There are methods to reproduce a piece, but the school doesn't have the equipment to do this and I kind of like the idea currently of people having one of a kind pieces.

The piece is then placed in an acid bath called ';pickle'. It is a powder called sparex mixed into water and then heated in a crock pot. I think the technical term for this pickle is aquaregia. The lab I work for makes this as a reagent, a mix of hydrochloric and nitric acid. The stuff we use in class is dilute, but it gets the casting skin, carbon and fire scale off the pieces quite nicely.


After a few minutes in the pickle, the worst of the casting skin is off and it can be buffed. A flat shiny piece would normally go through several grits of paper, then a rough grit in grease called tripoli on a buff, and then a fine grit in grease called rouge on a buff to bring up the fine shine that is seen on most jewellery. But with cuttlefish casting, I can just use a wire wheel and it's decently shiny and doesn't take down the texture that the cuttlefish gives to the piece.


As you can see, there's a big knob of silver on the top of the newly cast piece. That's called a button. We like to see a button when a casting is done. It means several things, but most importantly that the amount of silver was gauged correctly and that there were no breaks in the mold to let the silver out. The piece on the right would have worked, if I'd gauged the amount of silver better. So, the knob needs to come off so a hole can be made where a link or bail can be placed through which a chain can be strung. As Jenn pointed out, I can actually say 'I'm sawing the knob' and actually literally mean that rather than euphemistically. Apparently I look a little crazed when I'm doing my silver work.


Once the main part of the knob is removed I can start refining the shape of the bail with a file. And then drill a hole. Silver smithing has a lot of equipment that sounds sexier than it really is. One of the most used tool in the shop is the Foredom Flexshaft.


Et voila...a hole!


And let it be known, that I put my blood into my art, it means that much to me. Wound sustained removing a very sharp drill bit from the flexshaft.



And it's always nice to see if the gem fits the spot that I carved to hold it. The stone was a bit wobbly but that's easy to fix by deepening the hole it would sit in and shaping it to the back of the stone.


I thought I would have time to set the stone, so I went ahead and started drilling the holes for the wire used for the setting. I could have used a pre made setting, but that would have held the stone above the face of the tree and I wanted it somewhat flush. So I cut some 1mm wire, sanded the ends, used a centre punch to start the holes so I could drill into the face of the piece to set the wires.


Once the wires were in place, I fluxed the entire piece. Flux is used to prevent fire scale (oxidation) of the larger piece and also as a wetting agent to break the surface temperature of the metal used as solder and thus help the solder flow into the joins by capillary action. This time I used a large propane torch (with ambient oxygen intake) to heat the metal and solder the wires into place.


Here you can see the beads of solder that will flow down the wire to join the wire to the main piece.



The pickling process is done again and here is the piece ready to have the stone set. I actually messed up two of the prongs and set them too close to the centre so the stone wouldn't sit flat, allowing the prongs to be bent over to hold the stone in place. I'll cut them off, drill two new holes and try again next week. Then I'll put on a bail and the piece will be done.


Incidentally, this piece looks so bright right now because the surface is covered in fine silver. Every time the 925 silver is heated, molecules of pure silver come to the surface, making a pearly white finish. I used this method when I made a hawk pendant and it looked pretty nifty. I'm not sure whether I'll patina this piece or leave the bright shiny fine silver on the surface.

So there you go. I'll post pics of the finished piece next week.

  • Mood: Excited
  • Listening to: Parrotlets nibbling food

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