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Hollies hand full colour print

by Anthromod, published

Hollies hand full colour print by Anthromod Aug 27, 2015


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UPDATE 19th September 2015:

Hollie has tried on the hand and is very happy with it. The socket needs more padding and to be tightened but her father will do that once they get home.
They also told me she was using the previous model quite a lot, and getting more out of it the stronger her arm became. So my next approach will be to combine the previous all nylon printed hand with covers of the full colour printed hand.

UPDATE 18th September 2015:

Due to conflicting holiday and work schedules Hollie hasn't been able to try out the hand yet. Hopefully this should change tomorrow. I've uploaded some images of the hand coated in silicone with the nylon printed prosthetic cup. My wife thought loom bands would look good and since it's for an 8 year old girl I said ok.

So the print of Hollies hand has arrived from shapeways. It is printed in full colour sandstone. I did print one finger in full colour plastic but it didn't come out very well.
I'm currently adding a protective layer of silicone to it. The sandstone is quite brittle and grainy, so the silicone will help keep it together. I'll add a layer of epoxy to the inside to help reinforce it. It's possible to infiltrate the hand once it's printed with epoxy, but since I had to outsource printing that's something I couldn't control.

I plan on doing a similar thing with the hand once I've finished the Anthromod V2.0 parametric hand. Here the hand will be broken into sections and placed around the Anthromod 'bones'.

If you want to help me develop this hand you can donate to http://www.gofundme.com/prosthetic-hand
It really does help cover the costs of getting the parts printed.

I will add additional updates as I process the hand and eventually Hollie tries it on.

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for the longest time i have had ideas to make a functional prosthetic hand and feet after watching my grand father struggle he lost both legs and half his arm at pearl.harber i would realy like to talk to you on some of my ideas i am a great engineer and i wold like to make this a new project for Hollie

i haven't thought about this in years now my mind is going wild again

That is amazing and creepy at the same time.

Nice project. How much did it cost to print this?
Is the sandstone a viable material for this?

Hi stormychel
To print the coloured parts of the hand it cost £31 excl taxes and shipping.
Sandstone isn't a great material for this, so I need to reinforce it to make it last any length of time. I believe shapeways uses cyanoacrylate to fix the models, from their original porous state. Ideally I would use epoxy resin to do the same thing, which should make it a lot tougher.
I did try shapeways full coloured plastic with a single finger but the results were disappointing colour wise.
I plan to upgrade the process as technology improves, but I haven't seen a printer do as good colour as the sandstone ones.

Interesting. Will keep watching your progress!