Help for soldering complicated objects. Use: (Information video, see our Instagram page www.instagram.com/herensherens/ ) Lay out your workpiece the way you want to assemble it. A clay is useful as a substrate so that you can easily remove it, eg thermofix. Shake the plaster so that there are no lumps. Add water (35ml water to 100gr), mix well and pour the plaster over the workpiece. Wait until the plaster is hard (depending on the amount, about 10 min), remove the substrate, turn it over and solder! You can then break off the plaster. 150 grams. 70x70x50mm Comes in a bag.