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1. what exactly is resin and how is it diffrent from Gw plastics
2. is it more expensive?
3. thanks for responding
1. From wiki. "Synthetic resins are materials with similar properties to natural resins - viscous liquids capable of hardening. They are typically manufactured by esterification or soaping of organic compounds. The classic variety is epoxy resin, manufactured through polymerization-polyaddition or polycondensation reactions, used as a thermoset polymer for adhesives and composites. One more category, which constitutes the 75 % of resins used, is Unsaturated Polyester Resin. Ion exchange resin is another important class with application in water purification and catalysis of organic reactions."
Simply said, it is easier to sculpt in but more fragile.
2. Depends. If the models are hand-sculpted (Forge world) then it tends to be more exspensive.
3. No problem.
I donâ€™t want to be an ass but just clearing up Da Mighty Camel's answer a bit:
Resins are much easier to cast than plastics. Essentially every one of could do it and thatâ€™s why most small companies in the hobby figure industry use resins. Resins also recreate details well (only problems are with air bubbles). The moulds are also easy to make. Resins harden through a chemical reaction (not drying or cooling like plastics or metals)
Metals are probably the next easiest to cast but with low tech moulds you cant get the details as well. For that youâ€™ll need to vulcanise the moulds at higher pressures (not RTV) and use spin casting.
Plastics are probably the hardest to cast (in a sense), but after you have the moulds and the equipment, its dirt cheap to make large volumes. Thermoplastics (=plastics) can be melted again and again much like metals so casting is made by melting the plastic with an extruder screw and the injecting it immediately into the mould.
My explanation doesnâ€™t make much sense, but even though the material are similar they are also very different.
thanks for clearing that bit up then
Originally Posted by Will J
whoa.....seriously? Are you talking about the black primer?
That's good info. I've never worked with resin but I bought a Forge World Vanquisher conversion kit for a Leman Russ a while back just because I thought it looked cool. I would've been super-pissed at myself if I had ruined it shortly after beginning my build.
You actually USE citadel base coat?
Anyhow, there are also some big modeling differences between plastic and resin. Plastic is very easy to cut and work with due to the bonds that it forms when it cools. The molecules bond tightly with each other and form a solid mass. This makes conversions very easy.
Resin, on the other hand, does not form the same type of bond. Working with it is much like working with obsidian. It likes to flake off in sheets. If you make a cut into resin, then there's a good chance that if you put any pressure on the model at all, then the cut will become a crack and the crack will break very easily.
It is actually a lot more difficult to work with resin and takes a bit more patience and planning before doing anything to it; cutting, sanding, drilling.... ect. It's best to practice on some cheap resin that you can find in Wal-Mart somewhere before you start drilling holes or cutting off pieces on an expensive forgeworld model.
So very, very true!Originally Posted by H0urg1ass
In my naivete I started with the FW winged hive tyrant. In building it - not an instantly easy process in itself - I broke off three of the spiky bits along the back (which I had to pin back on), a talon on one foot, and reduced the tongue to 1/3 of its length before giving up and replacing it with a spare flesh-hook.
Sanding and smoothing worked OK, though - slightly different feel to getting the mould lines of plastics. And I didn't have any problems with drilling this time either, possibly because by the time I bought the pin-vise, I was paranoid about being careful.
I worry that the resin will continue to be fragile in play compared with the plastic and metal models, and the winged HT is such a large beastie it is going to get knocked around in transport.