Ascension Traditional Bronze Patina

This is the traditional bronze patina on the same sculpture, Ascension. Interesting how the patina can change the look of a sculpture. They are both beautiful in different ways.

In other happy news, I'm happy to say that I was again selected to show my work at the Loveland Sculpture Invitational 2012 - so time to get back in the studio, finish those two waxes and get back to sculpting!

Bronze Ascension with stone-like patina

 

Ascension is finally finished. This bronze is number 1/33 and has a neutral stone-like patina. You can see that the fabric draping from her hips begins to darken until it becomes the same value as the base granite. This is what I had envisioned: a light to dark composition emphasizing the rising of the woman. I had planned on having the drapery more earthy greens and blues, but that was before I started the bronze process and before I had learned about the limits of good patina. Rather than risk having the patina change too much over time or be garish in color, I opted for a more muted palette, which is in keeping with the very quiet nature of the piece. The base is a lovely granite called Nordic Green. Truly it is more of a soft black with hints of greens and coppery browns when the light strikes it on an angle. I also paid extra to have a revolving base, which makes it easy to turn and view all sides of her.

This first bronze has already been sold to Marie...I have an Artist's Proof for myself with a traditional patina, which I will have photos of tomorrow. Two more waxes of Ascension are nearly complete and will be taken to the foundry soon to begin their journey into bronze.

It's a matter of balance...

 I let this piece rest a bit as I finished up my latest book, "Bully Goat.". I'm glad that I did too. There was something about the piece that wasn't quite what I was looking for and needed the time and distance to mull it. I am trying to achieve the same sanguine feel of "Ascension" but there is a fine line between calm relaxation and stagnation of a pose. I came to the conclusion that the the pose was looking a bit too much like she was levitating instead of rising...there wasn't the balance of dynamic tension that I needed.

So I began to smush, cut, twist and turn until I got a pose that still is sanguine and relaxed, but now has some forward energy. The woman is leaning slightly forward as she ascends and the fabric that will be her support is going to trail backwards, giving a bit more movement.

I'm very glad that I decided to do this maquette (clay sketch) before going to final art, as it gave me the opportunity to practice and work out some problems, which will allow me the pleasure of pure sculpting on the final piece next week! I am going to take "State of Grace" down to my foundry and base shop tomorrow to have them verify that the balance of the sculpt will work in bronze and get some base ideas too. I'll also have the pleasure of picking up my first two finished bronze "Ascension" pieces!

Next, I'll be off to the hardware store to get a few odds and ends to finish up the armature before starting the final 18" version of "State of Grace".

Below is the newer pose with more dynamic tilt to her body and flow of fabric behind her:

Here is the original pose. While I liked how quite and relaxed and in repose she was, I was concerned that the overall feeling was more of stagnant levitation instead of active ascension. What do you think?

Hot Patina on Bronze Ascension

 Nearing the end of the bronze process. The final chased bronze sculpture was attached to a temporary base and washed wshed in a mixture of Potash Sulphurated (also known as Liver of Sulphur).
Then the whole thing was heated in an oven for 20 minutes. Next the patina artist, Chad, layered titanium while and other earth colors and blazed it with a torch.
Once the metal has cooled, it will be sealed with laquer and waxed an attached to the final base made of Nordic Green Granite.I should have photos of the final bronze sculpture soon!

Refining the clay sketch maquette "State of Grace"

 I spent a little time refining the forms and attitude for this clay sketch. It is next in the series that I'm doing of rising women. The first, "Ascension" is nearly finished in bronze and releasing very soon. This sketch in clay is a study for the next to go to bronze. The simple armature is 12" - about the same size as "Ascension". The final for this sculpt will be 18" using the smallest of the TruForm armatures.

Overall, I'm pleased with the direction that this is taking, but will change the hair and cloth a bit on the final. I'll be taking this sketch down to Art Castings to have them look her over for any casting problems before I start the final. I'll also take the sketch into the Base shop to get some ideas before I go to sculpt that may change the fabric and the overall height. Once I've had a chance to discuss this piece with my bronze team, I can begin working on the final clay to size.

This piece will be titled "State of Grace". 12" armature - but with hair and cloth she is currently 18" tall.

Metal Chasing of "Ascension"

The bronze has been poured then the metal shell smashed off. After it was sandblasted to clean off any lingering particles, they take the sculpture in and begin to weld the pieces back together. Then an artisan known as a metal chaser then works on
burnishing out the weld seams and any some imperfections that they find. Marker indicates areas that they will do some additional work.

 I spent a lot of time at the Base Shop selecting the base (Nordic Green Granite) and how the sculpture will work with the base. We are going to go with a two tier base so that there will be room for the turntable (then the sculpture will rotate smoothly)

The sculpture is looking beautiful and I've mapped out my patina ideas - so once the sculpture has been custom fit to the base and the chasing done - it will be time to patina and affix to the base!

First Bronze Pouring of "Ascension"

Today was the first pouring of bronze for "Ascension"!  The shells had been built up over the hollow wax sections over a period of time. The shells were then placed into the furnace and the wax was melted out - a process referred to as "lost wax".

Next they took special buckets and collected the molten bronze and poured the liquid metal into the now-hollow ceramic shells. Once the bronze cools, they break apart the ceramic shells using hammer and pneumatic tools. After removing the hard shells, the sprues are then cut off using plasma torches.

Once that is completed, the sections of bronze are cleaned up by sand-blasting the last bits of plaster shell residue.

Finally, after the pieces are cleaned up they are ready to be welded back together.

Tomorrow I'll post photos of the sculpt being metal-chased.

Refining clay sketch maquette

I got a little more work in on the clay sketch - refining shapes and forms a bit. This is Chavant's LeBeau Touche' HM (High Melt) plastelina oil based clay. As it's softer than my J-Mac Extra Firm, it's proving to be much easier to work quickly and the softness of the clay (when warmed under a light) makes it much more malleable. I originally started working with Chavant High Melt nearly 20 years ago when we lived in Sarasota and Placida Florida. At that time I was doing a lot of bas relief sculptures for Image Creations of Florida and found that the HM was the safest clay for me to use in my studio and then transport in the high Florida heat to my client's offices nearly 2 hours hot drive from my studio. Other clays would sometimes literally melt in my car during the commute.

So if you work in a high temperature climate I would highly recommend Chavant's HM (High Melt) clays for your use.

Maquette - clay sketch for next scuplture

While I have my 18" Truform armature set up and ready to go, I'm still working out the pose in my head. I decided that some sketching was in order but instead of breaking out the sketchbook, this time I decided to sketch in clay to work out some of the mechanics before I go to finish.


Anyone who know me know that I am an unlikely mix of spontaneous impatience (I want to get started NOW!) and relentless perfectionism (it must be as good as in my mind - no better, Better, BETTER!)


That can make for some frustrating work habits. So I'm killing two birds with one stone - starting work NOW and accepting that it can't be perfect because it's only the maquette (small clay sketch).


I am using an inexpensive 12" wire armature and some old Chavant LeBeauTouche HM plasteline. While this plasteline is perfectly fine, I do like Jmac quite a bit too. Since the LeBeau is softer than my extra firm Jmac, I though it was a good choice for clay sketching - it is quicker to warm up to workable consistency and softer/easier for my hands to manipulate, facilitating a faster, looser approach. Hopefully that will lend more life movement to the sketch and yet make it easier for me to stop at a less-than-finished state and then move on to my 18" final model, using the sketch as my reference.

Preparing board and Truform armature

 Time to get my new armature ready. I went to the hardware store and got my flange screws. After deciding the placement for the armature, I marked the board, pre-dilled the four holes, then screwed the metal flange in place.

Next I attached the metal armature rod from my 18"Truform armature. I bought this a while back, but have been busy working on other projects and haven't had the chance to try this.  The head is removable but the rest of the armature is not. In the larger sizes, you can take off the arms and legs, allowing you easier access to work on the sculpt - a real plus in certain poses.

I do know it was very tricky trying to get to certain areas with my "Ascension" so it would be beneficial to be able to take the arms and legs off of this armature. Since that isn't an option on this size of armature, I've been experimenting with creating my own system for making the extremities removable. So far 3 of my four designs failed, but the 4th is showing some promise, so I will do further experiments before starting this sculpt.

This will be a new experience for me, as I made my own armature using multiple aluminum wire for "Ascension".

Also, as I had some difficulties with the hands getting bumped, I'm building some wire armature hands to put on this piece, which may be very helpful or just a big pain in the butt - time will tell.

Getting Jmac clay ready for next sculpt

Time to prepare for my next sculpt. This one will be done in similar style and fashion as "Ascension", however I'm trying out a new armature, which I'll be showing later.

I spent a week purging my studio of past projects and art supplies that I'm no longer using. The local people on Craigslist are very pleased about that ;-) Still needing to improving my lighting for sculpting, as it's imperative to have good, strong directional lighting to cast shadows on the sculpt to reveal the forms. As I do most of my sculpting standing - or even standing on a stool for added height, I need a light that I can move around as needed - plus my ceiling is rather low (basement studio) so I don't have a lot of hanging options. I'm thinking of getting a boom for photo lighting and clipping a light onto that. It would be useful for lighting and photographing the sculptures later too.

Time to get my materials ready to work. Every artist has their own methods of working. David Lemon (check out this guy's blog - it's delightful to watch him work and his sculpts are crazy good) likes to chunk his clay into pieces using a knife. I suspect he's bigger and stronger than I am, plus my Jmac clay is extra firm. I think it's left over from when I was living in Florida and needed something that would say firm even in high heat.  I can't possible cut through it. This may be way firmer than I will like working in for a figure, but want to try and use it up before purchasing another block in a less firm formula. So instead of trying to cut pieces off the block, I place a lamp on it to warm and then shave pieces off and collect them into a foil lined box. This box has a lid (great for keeping out dust and hair) and the foil helps hold and reflect the heat from the lamp to warm the clay. The small strips warm up very quickly compared to larger sections. I can then easily mush the strips together into manageable lumps for easy grabbing later as I'm sculpting.


Time consuming and a bit hard on the hand, but will make the actual sculpting process much smoother so worth the time and effort now.

Attaching wax sprues & making ceramic shell

Jeanne from Art Castings foundry let me know that the sprues were being added to my wax Ascension today. So I grabbed my camera and drove down through the snow to get some shots of the process. Wendy was working on the piece as I walked into the sprue room. She showed me how she evaluates each section to envision how the bronze will flow into the cavity left by the wax, then creates different sized channels out of wax (sprues) to act as the funnel for the bronze to pour down.

It's amazing how much work and time goes into the creation of each and every bronze. This whole process is created for every one in an edition and also means that no two bronzes are 100% identical.

Once all the wax spruces are in place, Wendy adds a pipe to the bottom of the pour cup and takes to the slurry room and places them on tall poles called 'trees'.

Next John will take each wax section and dip it into a slurry mixture, let it drain a bit then take it to a sand box and shake silica over it. The slurry and silica are built up layer, by layer over a period of 1-2 weeks, creating a hard shell encasing the wax. They are placed on the trees to dry and harden.

Once the shell is complete, it's off to the furnace to burn out all the wax and pour the molten bronze.

Wax Chasing & Lessons learned

I worked on the first two wax castings of "Ascension". The folks at Art Castings were very helpful and Mac did some good work on the chasing. However, he was working blind, as he got her in pieces and had no real idea how she went together. Can't imagine doing that! So I learned that it's a good idea to provide a series of photos for them to work from.

Another issue was that there was some confusion over how the bronze was to be mounted onto the base. Since they didn't have a photo, they thought it was one way and realized that there wouldn't be enough metal to support the floating woman.  In reality, there was, mounted the way I had planned. So I had to go back and carve out all the wax that they had added.

Never worked with wax before so after a few hours at the foundry, I decided to pack her up and take back to my studio, since it was taking longer than I thought. You can see my desk with the various tools. The hot tool that is plugged in on my desk proved much too hot to use on the sculpt much. It vaporized the wax and melted much too aggressively to be much use to me. So I kept it on and placed my metal tools on the hot tool to heat the metal carving tools. That worked much better, overall.

It still took many hours, but that is mainly due to my inexperience and I'm sure it will go much faster next time. I may even chase the entire wax next time to gain even more understanding of the practice and to familiarize myself with what casts easily or harder to incorporate into my next sculpt. After finishing her up I took her back to Art Castings. Luckily for me, Jeanne too a look at the photoshopped image I had made explaining the mounting process - she didn't think it would work - that the stone would chip!

So I buzzed over to the Base Shop and spoke with Brian. Thanks to Brian and Jeanne, we were able to come up with a solution that will enable me to mount the sculpture as I had planned, with a bit of extra effort, and another lesson learned!

Finishing ceramic clay portrait of Harriet Tubman

 Harriet was very inspiring to sculpt. I took longer than I needed because I tried out different sculpting techniques from very impressionistic to fairly tight. I have to say that I really liked the looseness of the impressionistic version - so full of energy. However, as she neared completion the strength of her personality and her face competed with the strong strokes of the very loose version.

So I continued to refine until I felt that I struck a balance of free strokes and polish. The clay is a very heavy, firm, groggy clay called Chestnut that I got at Mile Hi Ceramics. It's an interesting clay to work with but the heavy grog can be a bit sandy to work with. I find that the grog (sandy, pebbly particles that add body and strength to a clay while reducing shrinkage rate when firing) comes to the surface when using sponging or brushing with water on the surface. However, if you push on the surface using wood or metal tools or pallets, the grog is pushed deeper into the clay and the surface is smooth - or at least smoother. I found this to be an interesting combination as I burnished a few areas where the skin would be most taught, giving a tighter, more light-reflective property to the clay and leaving the more textured, groggy clay for other areas. Very tacticile

This portrait bust of Harriet Tubman was very satisfying to sculpt. I plan on doing a 3/4 figure of her soon and the bust was a way of getting familiar with her face and features before expanding into more of the figure later.

She'll need to dry for a while before firing, so that won't take place until sometime in January.

Wax pour for "Ascension" Bronze casting

It was quite foggy this morning and I nearly postponed my drive down to Art Castings in Loveland. But, since I'd already filled my travel mug with hot tea and charged up my camera, I decided not to wait and I'm quite glad!

When Jeanne greeted me, she knew just where my work, "Ascension", was in the maze of other sculptor's molds and waxes. They had just poured the first two waxes and Mac was starting to chase them.

In the montage photo:

1) collection of rubber molds inside the mother-mold

2) the mother mold encasing the rubber like a clamshell

3) you can see that the rubber comes out of the shell

4) the mother mold seams together tightly

5) hole where the wax is poured in

Here are some photos of the hollow wax that was poured. Mac is working on taking out imperfections in the wax. He will also fix where the armture came through. When he reaches a certain point in the process, they will call me and I will head down to spend the day doing finish chasing and detailing until I am satisfied before preparing the wax for the bronzing process.




You can see the whole process of making a bronze at the Art Castings site http://artcastings.com/casting-process.htmlhttp://artcastings.com/casting-process.html

Harriet Tubman Sculpture Portrait Demo

 Sorry so slow to post....this is from a week or more ago. I let the clay firm up some more and then cut off the top of Harriet Tubman's head to continue hollowing out more. The clay is quite heavy and thinner walls fire better taking some of the excessive weight out of the finished sculpture. As I sculpt and make changes, I can add on a lot of additional clay. When I feel the portrait getting heavy I know it's time to hollow again.

By lifting the sculpture up, I can feel not only the increased weight, but where the weight is. That allows me to target an area for additional hollowing, which keeps the piece centered. Something you'll want to keep in mind when the piece is fired and ready for professional mounting..

Here I am repairing the area that was sliced off to gain access to the interior for hollowing. After putting the piece back together, I carve out a section of the join, add more slip, then some fresh clay.