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Thread: Plastic molding with Blue Stuff

  1. #21
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    They started new threads. They chose projects that were pretty complicated and detailed. Using the wrong type of material in the mold. With all the fine details they went with putty rather than a liquid. The castings had lots of defects from trapped air and the putty not getting into the fine details.
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  3. #22
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    I just ordered some to test it out, I'll post pics when that happens (prob next week).

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    Got the 'stuff' in today.

    Still waiting for the putty stuff you see in the video, so nothing to fill with.

    I test molded a garage door and a pallet load of boxes. The detail looks pretty good, tho forming a flat object like the garage door may be difficult with a stiff filler.

    I'm thinking about buying some resin, making a mold holder, and seeing how it fills with some more liquid. I think it'd work better for flat objects.

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    Hobby Lobby has some liquid resins under the Alumalite name. The quick set version has a tendency to bubble but I've not tried the slower setting stuff yet.
    Daniel Dawson

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    Does the resin get warm when curing?

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    You can also buy Alumalite two-part liquid epoxy at Walmart -- https://www.walmart.com/ip/Amazing-C...16-oz/37725399 (40+% cheaper). I bought some but have not had a chance to try it yet.

    You can get also good details if you only need one side (like for a garage door) with clay / putty two-part epoxy. If you look at the Adventures in Blue Stuff thread I posted my early results. However, my issues were mostly how I was putting the epoxy in the mold and not making sure the mold was clean between tests -- I realized less is more and that with the epoxy putty you can actually apply multiple pieces (seconds apart) and they all seem to fuse into a single molded part. This is key to getting the details right and avoiding air bubbles. I just have not had time to post pics of my better results.

    The putty two-part epoxy gets warm but does not seem to get warm enough to mess up the bluestuff mold (at least in the size and quantity I have been using for smaller mostly flat parts).
    Last edited by Mac; 24th Jun 2017 at 08:55 AM.

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    Quote Originally Posted by McNamee View Post
    (40+% cheaper)
    I'm not sure that's cheaper. With a 40% off Hobby Lobby coupon you can get the pair of bottles for $16, but they are much bigger. Can't remember if they are 16 ounces or larger but they are way more than 8 oz.

    Edit: Yeah they are 32 oz, which is 4x the product for for 50% more money. http://www.hobbylobby.com/Crafts-Hob...sin/p/80647425
    Daniel Dawson

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  12. #28
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    Quote Originally Posted by Mobile One View Post
    I'm not sure that's cheaper. With a 40% off Hobby Lobby coupon you can get the pair of bottles for $16, but they are much bigger. Can't remember if they are 16 ounces or larger but they are way more than 8 oz. Edit: Yeah they are 32 oz, which is 4x the product for for 50% more money. http://www.hobbylobby.com/Crafts-Hob...sin/p/80647425
    Not a champion of Walmart or anything but the Walmart link is to a 16oz total volume versions (2x 8oz). So agree with a 40% off coupon for Hobby Lobby (did not realize that these were common place) it is cheaper per oz for the larger size: $17.99 ($29.99 x .6) for 32 fl oz vs. $11.72 for 16 fl oz (if you compare apples to apples the Walmart price is $.20 less than the Hobby Lobby $19.99 price with the 40% coupon for the 16 fl oz version). Guess it depends on if you want more or less as well as whether you can get free shipping or local pickup at either store.

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  14. #29
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    *scratch that

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    You do have to be wary about buying the larger bottles of resins.

    Once opened the two chemicals will react with the air over time. Plus you have little idea how long the resin and hardener have been sitting in the store. They do have a limited lifespan.

    So, if you are just experimenting, buy small quantities.

    After getting bad results with casting with Envrotex, I tried Alumilite after seeing it at the big Hobby Show in Chicago. Not only were my results fantastic. Things that were molded in the late 80s are still going great.
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  16. #31
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    I almost got Alumilite today but I kept finding reviews saying it got pretty hot, so I passed for now.

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    It never melted the coating on the Dixie cups I would mix the Alumilite in.
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