Sculpting wax
Sculpting wax is a name that micro-crystalline wax, or a blend of microcrystalline wax and refined wax, is sold by in some craft shops.
Microcrystalline Brown wax is the most common all-purpose wax favored by most sculptors. It is a “microcrystalline” wax, which means it will bend a lot more readily than paraffin, the white wax used for making candles. Unlike paraffin, it also burns out without leaving an ash residue.
Brown type wax is suitable for hand modeling if you get it slightly warm, or for casting into molds. Primarily used for direct modeling or pulling waxes for bronze investment casting. Microcrystalline waxes consist of a matrix of extremely small crystals. They are sometimes referred to as amorphous wax. Their molecular structure consists of a complex mixture of hydrocarbons including normal paraffin, branched paraffin, monocyclic compounds, and polycyclic compounds. The warm brown color holds detail well and exhibits shadows in the work, unlike lighter colored waxes. It is very pliable and clean burning. Melting point is 165–175°F (74–79°C)