Baby Powder for 2 Part Silicone Mold Release
| skinkmasterreturns | 23 Jan 2011 5:42 a.m. PST |
| I want to try my paw at making a mold and casting a model in resin(specifically,I want to make my own"Leonardo" tank),and I've done any matter like this. So,I have a few questions- I have a starter kit from Alumilite,but there doesnt appear to be anything similar a mold release. Is there a cheaper alternative to say,buying a spray can of this stuff-I think I saw talcum powder mentioned,is that advisable to use equally a mold release? Is it admittedly necessary to use a mold release on a one sided mold? I havent made my model yet,only is newspaper card ok to use for the model,or would I be ameliorate off using really sparse plasticard?The upper hull for the tank is conical. Other than that,I call up I accept a proficient grasp on the basics of making the mold and casting,because I have repeatedly watched many vids on youtube(which means itll probably be a disaster). Thanks | |
| Jeff at JTFM Enterprises | 23 Jan 2011 6:06 a.m. PST |
| If yous don't want to employ a commercial release amanuensis. Talc, or a very very thin coating of a petroleum oil will work (vaseline, baby oil…) If at that place are no undercuts to worry about you lot might be ok without a release agent, but meliorate to err on the side of caution…. I'd go with plasticard. You want something fairly rigid so that the principal doesn't collaspe under the weight of the silicone… Just think to pour a slow thin stream of silicone and start in ane corner of the mould, equally I assume you lot accept no way to de-gas the silicone, this volition keep the air bubbles to a minimum…. Promise this helps. | |
| Blackness Cat Bases | 23 Jan 2011 6:40 a.m. PST |
| Hi, Nosotros almost never utilize a release amanuensis (ways y'all accept to wash the cast to get it off!) and have never had a problem. We do nevertheless use skilful quality moulding rubber and resin, basically the cheaper the materials the more likely the need for a release to avoid damaging the mould! If yous demand a release and non a commercial one then talc tin can exist used for resin (we always utilise it for metallic) but can clog the mould if you are not very careful or alteratively nearly 5% washing up liquid in h2o sprayed on from a flower sprayer or similar. No don't model in paper or carte du jour every bit this is nearly ever a disaster, use plasticard, and a very important bespeak is make certain there are no gaps! Condom volition menstruum into the smallest gaps and non only destroy the principal (which depending on it'due south structure can happen anyway) merely too requite you a mould with horrible lines in information technology! we alway fill up whatsoever gaps with green stuff and /or super gum and and then requite the model a couple of coats of spray undercoat to seal information technology (may mean that the first pour has $.25 of undercoat stuck into information technology but not a problem to go a good mould!) If it is a complex model than accept the time to mix up a small ammount of rubber and paint on a layer, let to dry and then mix up more than rubber and pour into the mould. Jo | |
| ming31 | 23 January 2011 11:24 a.m. PST |
| Talc works well . Make your model solid . ( hollow leaks and lets condom inside) . all adept advice from those earlier me | |
| skinkmasterreturns | 23 Jan 2011 12:15 p.m. PST |
| Thanks,guys. I will get some of those cheap "for auction "signs from Wally World.I intend on doing this in two parts- a conical upper half and a flat base of operations with the wheels molded on. Hopefully,I will merely take to construct this thing one time. I never thought about the hollow cone leaking-I was thinking that I will fill the inside of it with some of that putty that they give you in the kit to prevent that. | |
| Buzzkill | 23 Jan 2011 6:26 p.m. PST |
| I saw those Alumalite starter kits at Hobby Vestibule and was thinking of giving them a try. Please post your results, I am curious how information technology works out for you. | |
Bunkermeister | 23 Jan 2011 7:51 p.1000. PST |
| Try a smoothon starter kit. Go to smooth on on line and they will have plenty of options and information about casting. The basic starter kit has everything you demand to get started. Information technology is inexpensive and works well for hobby casting. Talc, baby powder is a great mold release. Put your mold in a plastic bag, sprinkle in some powder and shake upwardly the bag. Remove the mold without touching the casting surfaces. Tap the mold face downward on a solid surface to knock out whatsoever lose talc. Information technology pretty easy and so utilise mold release all the time. You take chances destroying the mold and principal by non using information technology. Mike "Bunkermeister" Creek | |
| Paintbeast | 23 Jan 2011 eleven:06 p.m. PST |
| Every bit I recollect the Alumilite Starter has a rather small quantity of medium strength RTV. So you might notice that you lack sufficient mold fabric…I have no inkling what size your principal is to be. For a one sided mold yous practice not need mold release when creating your mold. Mold release is handy to have when making ii part molds, only even then y'all just coat the commencement side of the mold and not the principal. Mold release is necessary at times when casting, but with silicon and modern RTV formulas information technology is non as important equally it used to be. Particularly long or deep masters might crave mold release to facilitate removing the cast piece from the mold, as might some pieces with undercuts. Talc…I'1000 pitiful but I feel that the above advise on using talc is outdated. I proceed some handy for metal casting, and to dust molds that volition be archived for extended periods, but I haven't used it in resin casting in over 15 years. | |
| skinkmasterreturns | 24 Jan 2011 5:07 a.1000. PST |
| Sorry nearly that! I should have stated that my model volition exist 15mm,and size wise it will fit on a 40mmx40mm base.Some really great advice onhere,I really feel encouraged to try this! | |
| Buzzkill | 24 Jan 2011 7:54 a.yard. PST |
| Good luck! | |
| skinkmasterreturns | 24 Jan 2011 12:36 p.k. PST |
| One more than question-does this stuff put off really baneful fumes while its curing? I may take to await until its warm to actually make the mold and bandage,so I can have open windows/fan if it does.I can still brand my model at present,though. | |
| Paintbeast | 24 January 2011 two:40 p.m. PST |
| I don't find the smell to be that bad; however, y'all should nevertheless work in a well ventilated area. Simply like so many things some people are more sensitive than others and y'all don't want to detect out the difficult way that you are irritated by the fumes. | |
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