The Final Stages of a Bronze Sculpture

We're nearing the end of the bronze sculptures posts!

Removing the screws and cleaning off any of the little bubbles of bronze that may have occured during the pour is an important step as it gives the project a cleaner and more professional look. After the bronze is whole and complete and any extraneous pieces have been welded together the patina can be applied.

There were only three patinas made available in class, green, a warmer tone, and an almost black one, by far my favorite is the darkest one. To apply a patina all that is needed is to simply heat the piece and brush on the desired concentration of the patina. Heating the piece gets rid of excess moisture in the metal and allows it to be more receptive the patina.

After the patina looks good a coat of wax helps protect it, and it's ready for display!

Pouring

The pour! 

We poured aluminum and bronze several weeks ago. I've been busy with the last weeks of school so here it is! Finally. 

For the pour we placed our empty molds in a bed of sand so that there would be less chance of splitting. It was also important that before then we made sure there were no loose pieces inside the molds that would mess up the form of the figure.

We all wore plenty of protection and looked kind of like spacemen.

The metal cools and we soak it in water til it's cold enough to remove the mold.

The pieces can be dislodged by striking the end of the piece that the metal was poured into.  

Once the larger pieces of the mold have been removed the smaller pieces can be chipped off and the piece can be blasted with air to clean off any excess silica. After that the next step is to saw off the excess metal (the screw) and apply a patina or base, as the case may be. 

Anyway, it's practically summer, and it's a beaaaauuutiful day! 

Melting Waxes

Tiny post today. The end of the semester is throwing me a loop and keeping me busy. Here's the last step before actually pouring the molten metal into the molds. 

Basically in this step, using a torch, the wax is melted out of the silica casing. One of the concerns in this is very nearly the same concern when attaching screws to the piece. When the wax is melted out, it's important to start from the bottom of the piece and melt the bottom of the piece so that the wax at the top has a place to go. If the bottom of the cup doesn't clear first, then the wax above it won't have anywhere to go and will expand and possibly damage the mold. Always point the torch down, and think through exactly how the wax will melt.

 I've been thinking about posting about video production soon, but at the moment I am far to busy actually putting together my video projects.