How to mold a prop Part 1

[@nixland]

Cool !! Thanks for the cool tips of making the base for molding swords. I am gonna mold a sword next week. thanks

[@UfoWarrior]

is it easy to mold from air dry clay a kitchen knife? i need for a movie prop. any advice?

[@seraphim196]

Hi! Great tutorial! I am wondering (although am unsure if you can answer this via KZbin comments) how you would do this process with some more dimensional than a flat prop. For instance, if I create ram horns out of clay. The horns would have the iconic ram horn twist and bend in them, which puzzles me on how to make a mold for that.

[@costume35]

hello what is the name of the silicone and silicone powder u use please can u tell me

[@_blood_moon_proto_1500]

Anybody know where i could find a pattern for that blade

[@SamsaraStudiosehdkb97]

If you don't have a prop (as in you're molding from scratch) would a possible drawing of what the prop would look like work as well?

[@anon777x2]

for long thin objects do you recommend vertical or horizontal casting? I've seen it done both ways. Just want some ideas of pros and cons before i try mine.

[@KRSprops]

Honestly as long as you put in good air runners, either way will work fine. It really depends on shape of the piece as you dont want flat edges facing up as these can trap air bubbles easily. Because of that, it is most common for long thin items to be done vertically

[@tofuninja5489]

Can you do this with something porous? I have foam batarangs that I'd like to make more of but I'm afraid the spongy exterior will not make or let the non stick spray not work.

[@KRSprops]

Hi there, any porous material will need to first be sealed, this can be done in many ways, ranging from paint, gesso, pva glue etc. Before molding

[@tofuninja5489]

I see. Thank you for the response!

[@tofuninja5489]

Another question. Can you use something like plaster to make the mold? Silicone prices seem really expensive. Would you recommend plaster or is it something that just would not work?

[@KRSprops]

tofuninja5489 depends on what you want to cast in, generally you want a hard mold material for a soft casting material and vice versa! you can try making a mold in latex but latex has significant shrinkage, you could also look up using silicone caulk to make molds as that is cheaper than the silicones you can get online for crafts but its also much lower quality in terms of tear strength, stretching and longevity

[@tofuninja5489]

Well I mean for the initial mold. Like how you use silicone for the "negative" mold (i think that's what you call it). I want to make a hard mold then fill the inside with a soft expanding foam. Would plaster be able to withstand the pressure of the expanding foam? Or would I have to use silicone because it can stand up ti it better?

[@ZOIMIBiIE]

What kind if silicone did you use? Is it as costly as smooth on?

[@ImRunningRiot]

I'm interested in mold making could I have a list of what materials you used and any tips for starting

[@KRSprops]

ImRunningRiot thats exactly why i made these videos, if you watch this plus my jacket & box mold tutorials you should get enough knowledge to make your own molds! if you are in the USA try looking on smooth-on's website and if you are in the uk you can source material from TOMPS

[@boozee1984]

Really interesting. Because i absolutely have no clue about molding or casting anything, i was wondering if it was possible to make a mold just out of clay. What do you say? Would it work aswell?

[@KRSprops]

A hardened clay one that stays soft? For hardened, you can use a technique called 'investment casting'. For soft clay I feel like it would be impossible to remove the prop you are moulding without destroying said mould

[@wrad45]

Is there a way to make a mold for a sword with out using a base prop to mold around?

[@KRSprops]

not that i know of, you cant really carve into silicone. you need the original weapon to make a mold of it

[@12aqrz]

You could always make like a clay or plexiglass base and make your mold around that.

[@LahmiB]

thanks, most of my molds were falling apart, splitting, etc. i just about gave up on it. based on this tutorial i'll try again and am confident i'll work the bugs out.

[@golem95]

+Lahmi B its mainly in making sure you have good keys for the mold halves to fit together well

[@kirkmeyers3163]

Where'd you get that huntsman

[@KRSprops]

if you mean the knife in the video, I made it!

[@imalone4evernow]

What if you don't have a prop of the weapon?

[@digitalAuge]

thank u 4 that great step by step Tut. i think thats the best 4 my first sword mold

[@dragonlordgaming7065]

where did you get the prop from? i would like to make a mold of a cortana chip and halo legendary symbol but I don't have a prop.

[@KRSprops]

i made them! you wont find these props anywhere that I know of to buy, and even if you could buy it from a prop maker they definately wouldnt be okay with you molding their work

[@dragonlordgaming7065]

did you use some kind of 3d printer or something like that?

[@KRSprops]

Dragon Lord nope! it was built from sheets of MDF :)

[@dragonlordgaming7065]

that makes sense, thanks for the info

[@KRSprops]

no problem!

[@RukiaFujioka]

what was the approximate cost of this mold? I know silicone and resin are both fairly expensive, and it seems a though you need a rather large amount for such a project.

[@golem95]

+RukiaFujioka to make a good long lasting mold, you will need a good amount of silicone. I probably used about 1kg of silicone for this and i pay around 10-12 GBP for that, then the resin and fibreglass is quite cheap as well at around maybe another 10gbp for the lot. Of course you would naturally buy larger than the quantities needed for a single mold so i am just quoting the proportion of the price of the materials needed for a mold

[@thundercombat]

you have tips for making a skyrim logo mold with clay (im gonna use lead to fill it)

[@KRSprops]

silicone can actually withstand very high temperatures, however it would mean you have to use something other than fiberglass for the mold shell as it would warp under heat. You could use ceramic to make a mold, look up a method called investment casting and you'll probably find your answers :)

[@thundercombat]

but how to push in the form cuz i dont know how to do that (i dont have an electric saw and all)

[@KRSprops]

like i said you can look up investment casting on google or youtube, alternatively look up push molds on youtube and google as well. I dont have any specific experience with this sorry :(

[@thundercombat]

ok (i dont have experience either XD) thanks anyway

[@KRSprops]

no problem :)

[@criptid2163]

What if you don't the prop and molding from scratch

[@alexandersausman4543]

same with me!

[@3p1c_Mustache]

try carving a rough draft of the prop or weapon you are working on out of insulation foam. every major hardware store sells large sheets for a few dollars.

[@wrad45]

Is there a way to do this with out a prop? To make attack on Titan swords.

[@KRSprops]

i dont quite understand the question, could you be a little clearer?

[@Bobbyholland901]

How much silicone did you use to make your mold?

[@KRSprops]

I think I used approximately 0.75 KG of silicone? This was a while ago and the quantities change from mold to mold

[@Tome13Eclipse]

It's been a long time i didn't heard this music, isn't that the Dofus theme?

[@KRSprops]

+Kuchizuke San Its Brittle Rille by Kevin MacLeod

[@Tome13Eclipse]

KRSprops Ok thanks :)

[@xgenerationfrost7986]

+KRSprops would u sell a mold?

[@EndlarStudios]

Price range?

[@cityofmayhem6472]

Endlar Filmations I'm sad the hunger games is over. 😭😢

[@EndlarStudios]

City of Mayhem that has nothing to do with my question

[@aspiringpirate]

What if I don't have a knife to make a mold out of

[@aspiringpirate]

(I'm just saying that I don't have a starting point to make a mold out of, like the knife he's using in the video as a guide)

[@KRSprops]

+Abby Miller then make one! learning molding isn't very useful if you don't have anything to mold :p

[@ConradHeil]

youre going to have A LOT more aire bubbles trapped if you put the pour spout there

[@KRSprops]

+Conrad Heil its worked out just fine so far for me!

[@TheModelVault]

Thanks for this vid!

[@BridgerCrusan]

The whole time I just thought of ksp because of the music.

[@Lord_Candy]

veryy helpful, thank you very much

[@michaelcullen7932]

thanks man!!

[@CookieMonster-kf1kz]

I wish is could do stuff like this D:

[@julianwhitesecondnaturesfx3637]

any chance you could mute future bkground music please. Thanks! that's some cool shiz dude

[@prosm6639]

Are you using kerbal space programs music?? 😂

[@KRSprops]

Sounds similar! Its some royalty free music by Kevin MacLeod, deets in the description :D

[@romeliadarosa4180]

I can make it myself. Just got instructions from woodprix website and I'm ready for do it :D

[@kirkmeyers3163]

Where'd you get that huntsman