Well even I got not much time for making this project and also this present, but will do my best. Now we're making mold (the core side)
assemble PP board back to the same position (as we've marked).
Set the height around 2 cm from silicone base. Then coat all silicone area with vaseline.
If you forget vaseline... you will need to jump out from building ToT
Use silicone (hard type) pore onto the whole area.
Start from edge around and spread out by air gun.
This step spends lots of time to make thin layer each.
make more layers until you can't see the blue color. Then it should be thick enough.
Finished with 4 layers. Wait till completely dry (~3 hrs) up to the silicone property.
Once silicone was completely dry. Pore plaster as per photo start from center.
thickness = 1.0-1.5 cm from silicone base is enough
Check if it's flat and smooth. Then wait for 1 day for plaster set completely dry.
Unwrap PP board, cut the exceed silicone. Mark each position well.
We got 4 pcs of mold completely.
disassemble it to check if details, dimple shape, are ok.
Then get ready to remove all plasticine.
We will not use this shape anymore, then remove the whole plasticine, plaster shell.
Remove all plasticine letters and check if they are complete. If not,
plan to fix them by soft silicone type. Now I trim the exceed silicone.
You will know your skill of making silicone by this result.
And also check if there are any weak rips around letters. if yes, fix them by soft silicone.
ahhh. this was one of much time I spent. Remove them all. For sticked sand, no need to remove. just leave them there. no any effect to resin process.
The upper and lower mold are complete.
That is to say, gap in between both ~ 5-6 mm. thickness is our work piece.
Not sure if this present is good enough to understand what it is.
anyhow, it is soon will be.
Enjoy?
bye for now. ^)^
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