Head Moulding BAD

8/13/2019 Head Moulding BAD

1/16

Head Mould 01 -

It went wrong....


2/16

This document will show the process of my Son Characters first head mould.

These first images show the little bumps and nicks that happened to him after sculpting him, then l

side for a while whilst other tasks called.

01. 02.


3/16

Here Im showing the process of re-smoothing the clay, ready to go through the moulding process

using my soldering iron with the hot air setting to melt some rough areas of clay as it gives a nic

04. 05. 06.


4/16

Next is the build-up of water-based clay to support the sculpt for the resin (same process for plast

I have covered this process in more detail in my previous posts.

07. 08.


5/16

The seam between the sculpt and the water-based clay is important, it needs to be as clean and neat

is less fixing when it comes to the final casting. This is where the two parts of the mould come

excess silicone will need trimming, so the neater the better.

11.

10.

12.


6/16

These images show various stages of building up the clay support.

Image 16 shows how clean and tidy a good seam should be.

13. 14. 15.

16.


7/16

In this mould I decided to use marbles as the location points. I had seen this suggested in a tutorial

so I decided to give them a try. They are embedded into the clay just past half way so there are no

would prevent the two halves of the mould from separating.

17. 20.

19.

18.


8/16

The next step was to build up the foam-core frame, seal the edges, and cover the model in a thin l

jelly as a water-proofer and mould release. Then to prepare the polyurethane resin

21.

22.23.


9/16

I had been putting this process off for a while as I was a bit nervous incase I did it wrong and had

again. Then I decided to just go for it, as time was passing quickly. I only had small plastic cups av

make 3 batches very quickly, and in my slightly panicked state I didnt mix the two part chemicals

The tester mould had gone perfectly so I didnt quite realise how important vigorous mixing was to

26 shows how the mould was seconds after the pouring, I thought it would continue to have a chem

the hour to use up all the smily looking areas. Image 27 shows how it looked the next morning

25. 26.


10/16

The next morning I was a bit gutted to see the resin was still gooey. To try

and rescue the mould, hoping it was just the outside that I hadnt mixed

properly, I mixed (thoroughly) another small batch and poured it on the

top to seal the top of the mould. This didnt work though, when I took the

foam away all the layers were still showing with goo oozing out.

28. 29. 30.

Perfect Layer

Other layers still visible with sticky slime in between


11/16

When I took the water-based clay support away I was hoping the batch of resin I had poured on firs

where it was most important, however, that wasnt the case. It was greasy, sticky and oozing ou

everywhere. There were large areas that had cured, but with slime in pockets around the mould. Th

just pull the sculpt from the mould, I had to cut and chip it out to try and save as much of the head a

cutter piece on the Dremel, and chiselled other areas out with a hammer and screwdr

32.31.


12/16

Here shows the devastation caused by not mixing the resin properly. It could have bee

35.34.


13/16

I also had to remove the mouth piece so I could re-sculpt my character.

36. 37.


14/16

As you can see, a bit of a mess. Another lesson learnt. 2 days to fix this simple mista

38. 39.


15/16

Also, a bunch of wasted resin.

41. 42.

Perfect Layer Bad Layers


16/16

Check out more aboutMothers Days

at:

www.skygecko-nat.blogspot.com
http://www.skygecko-nat.blogspot.com/http://www.skygecko-nat.blogspot.com/http://www.skygecko-nat.blogspot.com/

Date post:	04-Jun-2018
Category:	Documents
Upload:	nat-urwin
View:	216 times
Download:	0 times

Head Moulding BAD

Documents