Step 2: Silicone Top to Bottom

Glove molding is great for low budget casting because it uses such a small amount of your major expense in mold making: silicone. Still, it takes a good deal of practice, trial, and error to perfect any mold making method. If you've never done a mold before it's best to try some small tests with objects you can find around the house before going whole hog and buying every mold making tool and toy. Also, there's a universe of videos on Youtube that show people going through the process of making good molds. Watch them and try to pick up the way the move, the way they handle materials, and all the little tricks that can mean a big difference to your end result. There's also a minimum cost involved in making something like this. Even though it's not too terribly expensive there aren't many ways to cut corners, here. You get what you pay for most times when it comes to fiberglass resins, silicones, and mold releases. If you care about details and how many copies you can get out of your mold, don't try and skimp on the quality of your materials.

So, to continue with the tutorial, our model is on a sheet of plastic that's going to catch all the drips and spills and such as we paint on our first layer of silicone. I sprayed a coat of release on my horns and donned some latex gloves. I own a pretty professional respirator to keep from inhaling fumes in my shop. If you don't have one make sure your workspace is especially well ventilated before opening up your silicone. It's not enormously toxic, but isn't something you want to be breathing in for hours on end.

I mixed up my silicone in a small cup according to the manufacturer's recommendations and began to paint it on my horns starting from top to bottom. When you do this make sure to go slowly and evenly letting the silicone push out bubbles as it travels down your model. Hunt around your model for any air bubbles that might have been trapped and see to them with your brush. Make sure you get under every overhang and into every crack. This coat is going to contain all of your detail. If it's full of bubbles then every part you cast will have bubbles and imperfections as well.
I thought that was a replica of the spine candles from harry potter. Either way, I was looking for some molding instructables anyway. Cool candles!
Uhh. Just for your infomation those horns are those of a male Springbok (Springbuck if you don't know afrikaaans) It is the national animal of South Africa where I live. Impala horns don't curve they sort of go straight up and the backwards.<br><br>Just Constructive<br><br>DRH1469
I'd like to use your tutorial to make fiberglass molds to make custom foam latex gloves for a Halloween costume. This step is slightly confusing to me only because there isn't a photo explaining how the silicone mold is used in regards to the fiberglass. Could you explain this a little and maybe some tips for someone wanting to make gloves and not a solid casting?
The fiberglass is a support for the thinner silicon mold. The author explained that silicon is expensive, much more so than fiberglass. Look at it as a mold of the mold :) One could also use plaster bandages instead of fiberglass. To cast gloves of latex, you need a mold of a hand in plaster, in order to let the latex harden. the plaster form absorbs the moisture from the latex so it can harden.
This is a really neat instructable! I would like to try this and replicate those really cool candles in Harry Potter 3. Thanks!<br />
Thanks!<br /> <br /> I don't remember those candles specifically. Were those the ones shaped like a backbone?<br />
They were! As soon as I&nbsp;saw them in the movie, I wanted to make them.<br />
I have... http://www.etsy.com/shop/TheOneLifeRider?ref=seller_info :)
Yea the Spine Candles those were cool <br>
&quot;Cast and play and sculpt and duplicate until your heart fills with boundless joy&quot;<br>lol
Oh,my English is so bad.
have you ever used gauze to reinforce outer layers of the glove mold?
Couldn't you use latex instead of silicone?<br />
Yes. Latex is a lot slower though, because you have to apply thinner coats and allow each one to dry properly. <br />
I&nbsp;saw the horns in the thumbnail and had the image of a demonic skull candle with wicks that went all the way up into the horn tips. xD<br /> <br /> Great 'ible, very clear instructions, with awesome pics.<br />
Yay!&nbsp; When the horns have burned away, there you have your demon skull with flames coming out of the head where the horns were.&nbsp; Far out.
dude, and if you put the wicks in the right way, eventually the fire would be behind the eye sockets!<br />
&nbsp;Thanks. That would be mighty cool. I've been researching doing some projects with skulls.
did you part the silicone down one side or both?<br />
&nbsp;Only down one side. Some glove molds need more complex seams but one clean cut with an xacto worked for these.
Just to clarify from the above comment, what separates this technique from a glove mold is that there are no split lines at all on a glove mold. You take it off the product like a glove off your hand (think rubber glove), turning the mold partially inside out or stretching it so the product comes out. Good instructible just mistitled.<br />
&nbsp;Safety Warning: I would suggest that you melt your wax in a double boiler, never directly on a hot plate. My mother, a fourth grade school teacher melted wax on a hot plate for a school project as you are doing here. She burned down the elementary school. Boy was she embarrassed; although I got high-fives from the kids that got to go home early. &nbsp;The fire martial said that she should have used a double boiler to keep the flammable wax from igniting.
Very good point, but as an experienced candle-maker I will tell you that even using a double boiler there is danger.&nbsp; Years ago using a gas stove I managed to fumble the hot wax can as I took it out of the boiling water, and spilled some alongside the burner, and it ignited.&nbsp; Fortunately I got away with a second-degree burn on one hand, and got the fire out without burning down the house, but it scared the **** out of me and sobered me up right suddenly (of course that's another warning - don't do this sort of thing drunk).&nbsp; I think this could happen with an electric stove too, so long as the burner temperature is above the ignition temperature of liquid wax (I don't know what that temp. is, but it isn't real high).
For me, I just do it at a moderately low temperature, wait longer for wax, don't have to wait for fire brigade.<br />
Just in case nobody noticed, That's not a glove mold...<br /> This is what's called a butterfly or clamshell mold.<br /> Nice piece though.
nice one , but give every item in full detail that what the materials are made of ....<br />
&nbsp;Very nice! &nbsp;I've only ever done this with a plaster of paris mother but the fiberglass technique seems better for many purposes.
Awesome Instructable!!&nbsp; For a higher tear strength mold, can use Smooth-On Rebound 25 as well.&nbsp; It's very easy to use and will give you a bit longer lasting mold.<br />
Why did one candle burn faster than the other?
This is definitely one of my favorite instructables. I've been looking for this. (:<br />
&nbsp;My pleasure. This project was fun to make.
As for bubbles, I have already seen it is common use to vaccum the mixture (not just silicone)&nbsp;in order to get rid of the bubbles before.
&nbsp;It's a really good method as is pressure casting when the silicone is on the model. Unfortunately I don't have a&nbsp;vacuum&nbsp;chamber in my shop, but they're not all too hard to make.<br />
&nbsp;These are nice! Great instructions. One thing I would like to add is that you can substitute fiberglass resin for an acrylic plaster. I use what is called Jesmonite. It is water based, odor free, and extremely strong. Cheap, too! You use it the same way you do with the glass/resin materials.&nbsp;<br /> <br /> How do you get the wicks to stay put during the casting process? Those are sure neat.<br />
&nbsp;Good advice. I'll have to try it out.<br /> <br /> I usually use a pair of clothes pins to hold the wicks up while casting.<br />
whole size cheap baseball caps selling very affordable rate <br>http://www.gotapparel.com

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Bio: I'm M@. If you know Prototype This, TechShop, The Best of Instructables, Show Me How, or AVPII: Requiem, you've seen some of my ... More »
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