Optimus Prime Pen on the moon base... Part13-3

13-3 To make the bottom cover (continue)
Previously, we got model of bottom cover. Now we're making 1 side of silicone mold. This process is nothing difficult. Ready? Roll out...

To press plasticine as well, I recommend to use flat weight to balance all force

in order to make the perfect sealant.

Cut (trim) the exceeding plasticine inside otherwise the mold will not be stable.

It should be OK as 5 -8 mm offset. For beginner I recommend as 10 mm.

Also trim out side of PP-board as well.

When silicone is covering, it's difficult to see the level of it. So mark it now as 6-8 mm. (means you will have around 3-5 mm thickness on top)

To protect silicone stick to PP-board, coat vaseline reaches silicone level.

Pore hard type of silicon reaches the mark.

Air gun help silicone goes in all texture.

Mark level of plaster (10-15 mm)

This is important, to make the locker (between silicone mold and plaster). while silicone is almost dry (30 mins after poring) press plasticine ball into silicone jelly (only half ball).

Once silicone is dry, take the balls out.

Pore plaster reach the mark.

I don't like this process, due to it's long time. ToT

After, unwrap PP-board, clean all plasticine, trim the exceeding silicone.

(before unwrap, mark the position between PP-board and silicone)

mark all sign needed in order to rewrap later.

you can see the plaster will have dimple locker to silicone.

Take silicone out of plasticine to check any error. Clean out find sand remaining.

if there is no problem, put it back into silicone to be ready for another side mold process.

To roll it for making flat well that I always use.

We already got 1 part of mold. This mold side makes bottom surface inside the moon.

Next part will make the visible side that needs logo, support points and unflexible. 

I think it's a bit more complicated... let's see.

So see you on next part.

Hope you still like this part.

Thanks for watching

Bye for now... :)