Gum rosin is a solid yellow resin of natural origin. Resulting distillation residue of turpentine, gum rosin is mainly adopted in industrial sector, in production of building materials, glues, paints, dyes, etc.. Raw materials from which rosin comes are extracted by various conifers: larch, pine, fir, etc.. So it is an additive of plant origin from multiple application, which is completely safe for human health. It is also particularly suitable for uses in the craft sector: welding, making of musical instruments and accessories, etc..