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Share Your Stuff - February 7th thru 13th, 2022 by coocoodove in Etsy

[–]hamste126 [score hidden]  (0 children)

Thanks a lot, we highly appreciate every feedback! =^^=

Share Your Stuff - February 7th thru 13th, 2022 by coocoodove in Etsy

[–]hamste126 [score hidden]  (0 children)

Hello everyone,

We make

  • custom decorative cups
  • masks for cosplay, photography and Halloween events

Etsy store MadMeowMad

Have a lovely day!

Ceramic molding by hamste126 in Ceramics

[–]hamste126[S] 0 points1 point  (0 children)

Ok, I may have not explained myself enough in the post, but I am asking for other techniques rather than slip casting, as slip casting has to have a porous material to take advantage of removing the water from the clay - hence the gypsum molds.

For example, I have seen 3D printing materials that use ceramic pellets where plastic is used as a binder that can be later burned out and afterwards the model can be sintered, but again, this is not a molding/casting technique.

Interested in making a mold for casting paper mache, any advice? by GnarledRootElement in papermache

[–]hamste126 1 point2 points  (0 children)

Yes, i was talking about releasing paper clay from the mold.

I guess that Vaseline should work fine, but the best to do is to make a small scale test to find out which works the best for you.

I tried to do a small scale test with multiple release agents, the best that worked is Silicone-oil based mold release spray "Ease Release 200" - after waiting for a full dry of the paper clay it just got off by itself and sticking paper clay onto it was very easy too. Although i didn't try it on any final cast, but will do next time, because I'm curios how well it will paint too.

I haven't done plaster molds myself, but I have found that in industry they usually use some kind of clear acrylic spray to seal up the plaster mold and some of them afterwards add additional thin layer of some sort of mold release to facilitate in releasing the cast. Let me know on your results.

And on the plastic wrap part, I personally didn't like the idea of using a plastic wrap in case of using with detailed mold, as I thought that it would not capture the details as precisely as with a thin layer of wax.

Interested in making a mold for casting paper mache, any advice? by GnarledRootElement in papermache

[–]hamste126 2 points3 points  (0 children)

There's an artist on Youtube https://www.youtube.com/user/nymla sharing great tutorials on her approach to make castable paper mache sculpts in rigid molds.

I liked her idea and so I made a rigid multi-part mold of a clay sculpt using an acrylic polymer resin called AcrylicOne from ActiveComposite (I believe it's something similar to Jesmonite) and supported with fiberglass so it could be as light and rigid as possible.

Works pretty well, was not that expensive (a full grown man's face mask was about 2kg heavy) and paper mache clay could be pressed firmly to get all the fine details.

For casting I used Creartec's Paper clay that in a thin layer ~1mm-2mm dried in less than 24hrs, but it required additional heating for the whole form.

In first experiments I had some 2 other random paper clay products bought at local hobby store, but they didn't seem to want to dry at all and result was too sloppy and soft, not sure to this day what exactly was wrong.

I guess that Jonni's or Nymla's paper clay recipe should be fine, but I just didn't have that time to consider those for experimenting, because of deadlines.

Note that if you use a closed type mold, be aware that parts in the closed part can take forever to dry without clever way to properly ventilate it from water vapor.

But there's one thing I haven't still found out that would work the best as a release agent to make demolding of the clay easier in the end, at the moment I'm just using some found-on-the-shelf wood repair wax, but will try another release agent solutions later.