I’ve been asked this a few times and I think that ..no, plaster would not make a good filler because it is not inert. Fillers are also invaluable when slush casting with resin (building up a hollow shell) because the resin will automatically lay down a thicker coating. Methods: Six human cadaveric optic nerves were studied in vitro. Selection includes resin and resin hardeners, fiberglass cloth and tape, gel coat repair kits, resin additives, fillers, putties, resin tools and vacuum bagging kits. Any ideas? If you can give me an address I can send the black talc to, I’ll be more than happy to send it. Obtainable specialplasters.co.uk AT200 £34.80 per 25kg; tomps.com Omya BL -OG £5.04 per 1kg (price decreasing by bulk), French chalk £5.06 per 1kg. As for ratio, any mix which is still smooth enough to pour or spread should be ok. Predominantly I am looking to find filler materials that will enhance the mechanical properties of a snake drill concept. This is the modeller’s nightmare. I’m very new to this, and Im sorry for my newbiness Metal powders in polyester resin will be affected by ‘the elements’ .. both will turn verdigris. Thanks, Yes James, considering the efforts you’ve gone to already I’m surprised you haven’t heard of this .. thixotropic additive! When added to polyester, vinyl ester or epoxy resins these materials can minimize resin drainage from vertical surfaces, increase bonding properties, reduce the cost of the resin mix, improve abrasion resistance or improve sanding properties, reduce or increase the mixed weight and lower shrinkage rates. Would Plaster of Paris make a fine filler for sanding and strength? Being silica-based it will also fill and bond with silicone rubbers. For example, if you make a silicone mould around a lightbulb, the silicone will reproduce the ‘polished’ surface of the glass and transfer this in turn to the cast, whereas a prototype with a rougher surface will result in a ‘matte’ look on the cast surface. Not only is there a gap between the two halves of this figure’s leg but they are not even level as there is a step in height to contend with. Cheers as in fibreglassing, including a layer or two of binding mesh (glass fibre matting, jute scrim or similar) when casting. The bar wood is glued and nailed to the counter tops, so it is not perfectly level and I have no way of leveling it (if I sand it down it will ruin the look I want). I have considerable experience with a product from the US called Kraft Kote. Either this, or you have to abrade the cast surface afterwards to matte it. I have no problem coloring my easy cast clear epoxy resin with these methods. Dry fillers can be a useful addition to resin for many reasons, but not all fillers will perform well. I am using led lighting and wanting to spread the light into my castings?? Hi David, I am making several tests trying to make the powder impermeable before mixing it with resin. Simulation 3D Mushroom Model-Mushroom Filler For Resin Epoxy Mold-DIY Jewelry Filling Material-Micro Landscape Decoration Accessories JOJODIYCRAFT. The mixture is sent to us after drilling and we process it by running it through a thermal desorber at approximately 650 deg F. The purpose of this is to extract all the liquids (oil and water) the residual ash is my reason for this mail. It’s not a plastic that can be used in a home or small studio situation .. as far as I know, only industrially .. therefore I can’t offer anything from experience. The only other option would be to cast with a regular and smooth surface and then make a coating mixture with the same resin and coarse sand or grit and apply this to the cast surface, but this is a lot of extra work and it would be very difficult to apply this uniformly! I make faux bois furniture and lighting from concrete/ferrocement. Is collagen simple and cheap to produce? Finely powdered slate, gives a dark grey slate finish to castings and is also fairly cheap for general purpose filling. There are self-levelling crystal clear epoxy resins for this very purpose .. but at the moment I can’t remember where on the net I’ve seen them. Congratulations on your website, it was amazing to find all the information you have shared with the public. Obtainable specialplasters.co.uk Trucal No.4 £6.96 per 25kg. The contributor uses lentils as filler but I’m not sure I’d want to use these as when sanding the back of the hold to a flat surface the lentils would probably become exposed and subsequently absorb moisture (I will be fitting outdoors). After a gap filler has solidified, you can apply different techniques to ensure the surface between the two bridged parts is as seamless as possible. I would recommend trying GP (general purpose) polyester resin because this is by far the cheapest. Thoughts? Will resin hold up to the weather and sun? When I cast it it’s very brittle. Have a look at this first. I was going to try some sample batches soon to see if I could get the resin to color but was curious if you might know to save me the trouble of wasting product. In second chamber hardner (Benzoyl per oxide paste) is used. and the resin is reacting a bit, producing carbon dioxide. Another of the main reasons for adding fillers is to make the cast material easier to machine or sand, in other words basically weakening it, and this is particularly true of polyurethane. hello there Do you know of a type of additive that is reflective..or can enhance light? I purchased 4 gallons (to cover roughly 30 square feet) off of this site because it boasts a 1/8 in thick self-leveling flood coat, where as everything at Home Depot or other hardware stores listed 1/16 in thick coat, or “50 layers of varnish”: http://www.bestbartopepoxy.com/ If you have questions about adding fillers to Polytek polyurethane casting resins, please get in touch with us: Call us at 800.858.5990. But in terms of adding weight, it may be the cheapest but I would have thought there are heavier options, such as marble dust. As you can see below, prices vary a lot according to quality or specific grade, Obtainable specialplasters.co.uk £29.28 per 8kg, easycomposites.co.uk £26.34 per ikg (as ‘glass bubbles’). Is it the specific gravity of baryte powder or some contamination? While you’re at it .. have you tried flour .. or icing sugar? I am also looking for some semi automatic machinery for production run. I am thinking of making some children’s climbing holds using a foam and RTV silicone method as described on http://www.instructables.com/id/Making-your-own-climbing-holds/?ALLSTEPS . Please let me know as soon as possible. Please help. I am not really clear on the difference. For example I know that Fillite works well with a hard casting plaster such as Crystacal R and I’m assuming the same for Noblite or glass microspheres. If your resin is marketed as ‘white’ it’s probably pre-filled with an amount of white pigment, so you may not get strong colours. If it’s impossible to include a matting layer i.e. What type and % of filler could approximate a nice, dull, gray finish with a cool touch? Others such as glass fibre and marble dust will make the resin stronger. is not and will not become chemically active) can be used as a filler in both polyurethane and polyester resins. I shall be thankful if you can throw some light and guide me regarding the same, 1. an industrial ash by-product, more specifically ‘microspheres’ of alumino-silicate. Some, such as Fillite and glass bubbles, will reduce the weight of castings considerably and also make the resin more carvable. Thank you! Thanks I am on the mica trail! But as far as I know a filler won’t make the resin surface matte .. the surface exposed to the air will still be shiny, at least I know it always is when using polyurethane resin. I only have time for a very brief answer I’m afraid! When added to resin fine talc will thicken it quickly, changing the viscosity noticeably even at just 10%. Luckily Manoj Kumar has replied to your previous enquiry here. Doll & Model Making Candle Making Food & Fermenting ... 3D Fish, Transparent Film, Epoxy Resin Filler, UV Resin Filler, Koi Painting Art, Resin Inclusion, DIY Craft Supplies, Gold Fish, Blue Fish CreativeSideSupplies. $5.25 $4.20. .. no, not a good idea to add talc to cold-casting gelcoat layer because I’m pretty sure this would dull down the metal effect achievable? Could I use Talc as a filler / thickener with Polyurethane Resin? polished with steel wool to expose the metal particles and achieve a metallic shine. An exception is Cabosil when this is allowed to soak in resin overnight before using. I need to make a kg at a time and keep the cost down. I rotocasted a few figures and the feel is like vinyl. 5 out of 5 stars (5,069) 5,069 reviews. I personally would probably use 50% Fillite by volume and 1% catalyst. I think they’re just US. Say from a normal viscosity to a more syrupy viscosity? Whenever I want to thicken polyester without affecting the look I use a special thixotropic paste from Tiranti http://www.tiranti.co.uk/EdgeImpactShop/subcatdivision.php?Division=525&Content=Thixotropic+Paste+ which can be finely controlled to achieve any consistency of resin. I simply don’t know for sure because I’ve never tried it myself. I considered doing a “test pour, but the mixing steps are very specific, and I don’t want to waste the resin because it is quite expensive. i want to avoid painting after the casting rather to cast all the small parts i.e eyes, teeth, magic wands, blushing cheeks etc with pigmented polyester resins and attaching with a glue(which type). usually they are attractive with many colours. I don’t think you can get as much as 15mins working time with any polyurethane resin. Has the appearance of a white powder, but is minutely chopped polyethylene fibres. I agree with the Instructables writer that polyester resin can be more brittle .. but I don’t see why it shouldn’t be fine if you’re careful when bolting the forms in place. There is no problem in setting time and mechanical properties of the resin capsule. Do you know of a filler that would thicken either polyester resin or epoxy, yet be clear? This is a self-leveling epoxy…so if the top is not level..you will have a nice glossy puddle on the floor. Good Afternoon Bhavin and David, So now the problem seems to be that I can reduce the heat build up when the generator is running with a metallic filler but a coat or two of paint for sealing will reduce the heat dissipation. See my post on recycling or extending silicone. Can you add cement as a filler? so time factor is arises problem in casting time. I was considering using rosin and beeswax, and it seems that some people who are working with rosin add charcoal to this mixture. AT200 talc (specialplasters.co.uk) is especially fine and serves particularly well as a filler if the resin needs to be machined after casting, making it firm but easy to sand. how will that affect potlife / cast? Polyester resin, on the other hand is generally not as shiny. But if you want thicker, you can may pour it in layers by letting each dry and then pouring another the following day. It’s not working. Any updates after allowing it to dry further. Yes, probably any filler with make the resin opaque .. but finely ground ones in particular. It explains what you have to do. Email us at [email protected] Fill out this simple online form. .. and what problems? Many thanks for this Ralph! Obtainable specialplasters.co.uk bronze £22.20 per 1kg, iron £13.14 per 1kg; tomps.com most metals £12-20 per 500g, iron £14.40 per 1kg. I guess, unless you know different, a non-ferrous metal filler like copper filings would be required but what would be the effect on the other characteristics I require and how much filler would I be able to add per litre of resin? I was thinking glass beads might be best but do you have any ideas on what might be a cheaper alternative? Produced by Polytek specially for thickening polyurethane resins and rubbers. It’s really good! I like the wild questions! However, when this mix is rotocasted, the results can be fragile and if accidentally dropped, it will shatter like glass. All the best, Will Huntley, Hi Guys , Not being a geologist or a chemist, I can’t tell you what it is or how to refine it. Since normal talc thickens resin quickly it is excellent for making a filler paste (such as normally bought for car body filling) even with polyurethane resin, although working time in this case is very brief! Could you tell me exactly which resin you’re using, what you’re using for the mould, where the sand comes from etc? Some can be added as much as 100% by weight to resin without making it any less pourable. effective when imitating stone. If all that’s needed is a metal effect on the surface it’s common practice to fill a small amount of catalysed resin richly with the metal powder (Tiranti recommends the same volume plus a little more) and apply a thin coat to the mould surface first before filling the rest with unfilled or pigmented resin. Thank you for this fantastic source of information! I found your site by coincidence, interesting reading. Trucal No.4 has a particle size like table-salt and also serves as play sand in children’s sand pits. Talcs will also generally improve brittleness (meaning that they’ll make polyester resin less brittle, more impact resistant) and make the surface more durable. The same is true for other fillers meant to impart a surface appearance such as powdered marble or Portland stone, or sawdust .. with these polyester resin will usually give a better result. a filler-mediated occlusion of the central retinal artery. By ‘casting grade’ do you mean ‘clear casting’ polyester? My instinct is that it may unfortunately be due to the ‘quality’ of the marble dust you’ve been sold i.e. We can make any particle size to suit an application as long as it is in sufficient quantity. Fillite and sand, I would guess, or an available stone powder filler i.e. Your intentions re marble simulation sound right! Hi David thanks for your answer! Glass bubbles or ‘microspheres’ are suitable for all resin types and will thicken, reduce weight and make casts easier to sand. .. so if you’re happy to send me some (i.e a kilo or so) I can at least do some small tests with the resins I have? Thank you for a great list you provided us with. It’s resin from the pine tree. The section is about 10mm all round apart from the horse. The problem is with filler and we are not able to make out, what could be present in the filler that could cause immediate curing and how it could be tested. Please give your contact details, I will try to short out your problems. 1) Get a glass jar with a screw on metal lid. I want it hard and clear not brittle almost like a hard glass tile.. and I don’t know which one to use epoxy ,polyester , or polyurethane ? It has chemicals in it which might affect the resin. My instinct is that it should work because it should stay chemically inert (therefore not affecting the setting of the resin) unless combined with water. David, good site with lots of useful info The ‘bleeding’ has continued all this time. .. i.e. Most of my experiences with commercially available Bioresin have been bad though .. i.e. This is real metal, but very finely ground into a powder. What type of resin to use? Have a look in my ‘Lexicon’ above under ‘cold metal casting’ for an outline of the method. Sanding will take care of minor problems. GDay Joshua, When working with polyester resin it is often recommended that if a substantial amount of filler is used the percentage of catalyst added should be increased from the usual 1% to at least 2% (even up to 4% if mixing small volumes) in order to compensate for this and speed up the setting. I’ve found a fibreglass fibre filler supplier, does this sound like the stuff I need to fulfil my intended needs? One optic nerve was selected as a control and maintained at physiologic temperature, without any exposure to hyaluronic acid gel or hyaluronidase. This article shows techniques and provides advice on how to fill gaps and hide seam lines on scale models. I would be most interested in your test results with the black talc. It is a two part epoxy that i have had many clients use for this specific process. 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