But No Bubbles! Part 1

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Published 2020-10-02
Can I make a bubble-free silicone mold with no vacuum chamber?

SKIP TO THE GOOD PARTS:

00:00 Can I make a good bubble-free mold with no vacuum pump or pressure pots?
00:39 Buying rubber at the craft store.
01:35 Casting the duck we examined in an earlier video.
02:17 Testing the rubber with the other materials for cure inhibition.
09:53 Building the mold case.
11:28 Mixing the rubber - the WRONG way!
13:57 Brushing on the print coat.
14:47 Pouring the first layer of rubber in the case.
17:43 Mixing the rubber - the CORRECT way!
18:48 Pouring the second layer of rubber.
21:19 Pouring the third and final layer of rubber.
21:55 Opening the mold case.
24:04 Cutting the mold to extract the model.
28:15 Thanks for watching!

All Comments (21)
  • @Lions1977
    As someone with minimal experience making molds it's actually very helpful to see you without your tools. Just to see how you work and think.
  • @YanickFM
    I'm really glad you addressed this topic. I'm new to casting things and I don't have a lot of tools yet
  • @tiggerbiggo
    It’s amazing to me that you think you are cranky or whiny at all, it’s so wholesome seeing you work that if it weren’t for the overlay I wouldn’t even be able to tell you were annoyed in the slightest! Honestly those containers would annoy me too if i was used to working with something better ;)
  • Great to see a comparison of diy techniques from a professional!
  • There's a trick for pouring from a wide-mouthed container into something much smaller: 1) Get a rod that is longer than the container is wide (I like something about 2-3 times as long). For that container, I'd be thinking about either a piece of wire coat-hanger or a chopstick. 2) Lay the rod across the top of the container with most of the excess on the side you will be pouring from. 3) Pour. When pouring, the surface tension of the liquid will tend to adhere the stream to the surface of the rod, so the liquid will follow the rod. This can take a bit of practice, as too much or too little flow can both cause problems. 4) When you have enough out, leave the end of the rod in/over the receptacle while tilting the wide-mouthed contain back to stop the flow. 5) Allow whatever is still on the rod to flow into the smaller container, then clean the stick. I've used this for pouring paint into 15ml/0.5 oz plastic squeeze bottles without really any problems; it should work fine for resin or rubber components as well.
  • Great little how-to beginners’ style! I really appreciated the tip on pouring the catalyst first. I haven’t worked with molding silicone yet and trying to pick up all the tips I can find before getting started. I like to bake so I’m familiar with the idea that little tips like the order of ingredients can really make a big difference in labor. Thank you!
  • @raullo
    Sir, you are so wholesome. Remind me of my father in law. All the success in your channel, you got a fan here.
  • I cut up my failed molds all the time and us up the chunks...that stuff is too expensive. I am still a total newb but had some successes thanks to videos like yours.
  • @JohnJones-oy3md
    I'm surprised that you don't travel with a small emergency supply of bees wax on you at all times. ;)
  • @johnnytoronto1066
    I greatly appreciate your experience, your many many tips both little and large, and your presentation. You're like having a friendly guy next door who has pretty much all the know-how. Thanks!
  • @PS-xw8kg
    I really loved this video, because I am just starting out and you used the things I have available to me. I actually purchased that exact kit yesterday before I saw your video. I don’t have all the tools and contraptions that you have in your workshop so this was a great video for me the beginner. Thanks so much!
  • @RogerGarrett
    So it really all comes down to brushing on a print coat in order to avoid bubbles. Good to know. That's exactly what I was preparing to do with my upcoming, really important, must-not-have-bubbles, project.
  • Just got into this channel (40k models trying to reproduce), and I was just saying to a freind: "This guy makes it look fun and easy, I think I could do it. But I don't have a vacuum chamber..." 2 hours later, I see this video.
  • @f.d.6667
    These videos are a an absolute pleasure to watch... The pace, the tonality, the structure and logic show an amazing level of professionalism - not only regarding the craft but also regarding a didactic approach. Thank you for all the effort of making these outstanding videos!
  • @PREDATOR0140
    "I'm already losing hair like theirs no tomorrow " 😅 god that made my day!
  • @SwellNelman
    A guy like you should really get a big boy shop one day. But, you seem to do well with common craft items. Have fun with the hobby, old salt.
  • @passiveftp
    Love this video! brushing the model with the rubber is a great idea! thanks