Silk Mermaid » Preparing for molding

Inspiration

Coral Mermaid (2006) - photo by Mike Edenfield

"If you are going to take your precious free time for months and build something, there is no excuse for second-rate work. You cannot claim client deadlines or lousy budget, since you have control over both of them.

"The opportunities to do the great defining pieces of your career come around once every couple of years. Are you going to waste those rare chances on a less-than-grand endeavor?"

Read "How it happened."

About Kim Graham

Kim has sculpted since the mid-1980s in a wide variety of media and sizes, ranging from fired clay figuratives to architectural ceramic pieces to 22-foot fiberglass dragons. The online Kim Graham Studios gallery shows some of her work. Her current interest is large-scale architectural pieces. Kim lives in a suburb of Seattle, Washington. She is accepting new commissions at kimsculptor (at) gmail (dot) com. (More about Kim Graham.)

Kim’s recommendations

Sculpting supplies

I use "Le Beau Touche" modeling clay from Chavant. This plasticine goes for approximately $4/pound. It is mid-level hardness, formulated for northern climates.

I make molds using these materials from Smooth-On corporation:

Mold Max 30 high-tear-strength silicone rubber
Plasti-Paste Trowelable Plastic
Thi-Vex II Silicone Thickener (thixotropic agent)

My supplier here in Washington state is Far West Materials.

(By the way, Smooth-On's site offers amazing must-see moldmaking video instructions. I wish I'd had these when I was starting out!)

I strengthen the mold rubber by adding small amounts of Fibermesh 150 e3 polypropylene multifilament fiber (often called "stealth fiber"), sold by concrete suppliers . Here in Seattle I use Glacier Northwest.

Glue gun

My hot glue gun, the 3M Scotch-Weld Hot Melt Applicator TC, costs about $100-140 and is well worth it. I’ve burned up seven ordinary $25 glue guns in the past two years. This orange beast can effortlessly put out several pounds of glue a minute. It requires specific shaped glue sticks available in 11-pound boxes. You can find great deals on the web.

Silk Mermaid > Preparing for molding

Preparing for molding

Posted by Allen | Technique | Monday 5 January 2009 10:40 pm

My team and I are preparing the sculpture for molds. We’re taking off the pieces that need to be done separately: the ears, arms, and fingers. We’ve made a mounting bracket of scrap lumber and steel to hold the arms so it will be easy to get around them. We reuse the bracket materials after each job.

Another photo after the jump.

Removed from the arms, the fingers rest on the table at lower left. Note the small posts inserted in the base of the fingers.

We’ve removed the fingers and added small posts to their bases. These will roughly socket into the holes cut into the hands. When the whole sculpture is assembled later, this post-and-socket arrangement makes these small joints super-strong.

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