Making Red washer / gasket / o-ring for Knee Darts

clmayfield

Active Hunter
I thought about whether to put this in my other knee pad thread, but I think it is worth another thread here. My original thread on making my knee pads is found here:
http://www.thedentedhelmet.com/showthread.php?t=56980


One of the problems that I had was trying to find the appropriate colored rings for the knee darts. Black rubber washer / o-ring / gaskets are relatively easy to find. However, red gaskets are really tough to find. I had an idea to pour some in place using Plastidip. It was kind of expensive (seeing that I only needed one red o-ring), but it delivered me what I wanted in the right color.


Here are the tools I used (painter's tape not pictured). Plastidip, a medicine dropper (small syringe will work as well), and a cuticle trimmer:


Knee%20Pad%20Gasket%20Tools_zps9vpxnzfy.jpg



I recommend getting the red plasidip straight out of a can, but all they had was the aeresol. The problem with the aeresol is that it still contains gases from the aeresol can, which results in bubbles.


I sprayed the plastidip over a piece of wax paper until it was thick. Then, I sucked it up in the medicine dropper. I tried this once without the medicine dropper and the result was that I got plastidip all over the walls, which was very difficult to remove. The next picture is of that first effort (without the medicine dropper).


Knee%20Pads%20Red%20Black%20Pour_zpsscexhjmf.jpg



In my second effort, I only used painter's tape on the outer layer as the inner layer of painter's tape was difficult to remove. The plastidip kept wanting to stick to it. I let it dry in place overnight and ended up with a nice o-ring. There were two problems, though. One was that residual plastidip had climbed up the sides of the painter's tape. That is where the cuticle trimmers came into play. THey made a very nice straight trim of the excess plastidip. Don't tell your wife you are doing this.


The second issue is the bubbling from the aeresol gases. I fixed this by sliding the o-ring off, flipping it over, and gluing to the dart with CA glue. And here are the results.


Knee%20Pads%20Red%20Black%20Side_zps4saqtyls.jpg



Knee%20Pads%20Red%20Black_zpskb5xqooy.jpg



Please note that I ended up using a good old fashioned black o-ring for the black. I had to expand the hole in the center with a drill and a dremel and had to sand it down to get the thickness right.
 

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clmayfield

Active Hunter
For comparison, here are some actual o-rings from the MoM display:
Boba-Fett-Costume-MoM-121601A-292.jpg Boba-Fett-Costume-MoM-121601A-293.jpg

Obviously, these aren't as thick.
 

ShortFuse

Hunter
I wasn't aware that these were o-rings. I thought the ends were just painted. That is what it appears to me as being. ???
 

clmayfield

Active Hunter
Look at the texture. That's not paint. The black one looks kind of like brake pads. The red one looks like thin plastic.
 

01Hawk

Active Hunter
I got into a discussion about this at Celebration and had never heard it before. I think they are painted myself although I can't explain the texture . The bend in the red one could be a radius on the surface where the tube part meets the base
 

clmayfield

Active Hunter
Those are two separate pieces done two separate ways. It is impossible for me to look at the black part of the picture I posted and think that it was painted. It looks ripped in parts and has an interesting almost diamond texture. I said brake pads, but not quite like those. It looks like something familiar I can't quite place.

I didn't nail it with my plastidip washer, but perhaps a layer of plastidip might create this effect where it is rounded where the floor meets the sidewall. It looks almost like red electrical tape, but it couldn't be because there are no seams.

In JBDubz' pic, the black dart definitely looks painted.
 

Viper

Hunter
On the Red Knee Dart, definitely is just the shape of the metal, the painted edge is not 100% flat, there's a slight groove to it. You can tell by the tiny scratched off portions of red paint, that's too thin to be an O Ring or something other than paint. Good eye checking it out though. (y)
 

smuggler_fett

Jr Hunter
Those are two separate pieces done two separate ways. It is impossible for me to look at the black part of the picture I posted and think that it was painted. It looks ripped in parts and has an interesting almost diamond texture. I said brake pads, but not quite like those. It looks like something familiar I can't quite place.

I didn't nail it with my plastidip washer, but perhaps a layer of plastidip might create this effect where it is rounded where the floor meets the sidewall. It looks almost like red electrical tape, but it couldn't be because there are no seams.

In JBDubz' pic, the black dart definitely looks painted.
It looks textured almost like grip tape on a skate board thin and black


Sent from my iPhone
 
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