Abstract: The manufacturing method of the honeycomb structure includes a raw material preparing step of adding the powder of porous silica as the inorganic pore former to a forming raw material and kneading the forming raw material to prepare the kneaded forming raw material, an extruding step of extruding the obtained forming raw material to form a honeycomb formed body, and a firing step of firing the extruded honeycomb formed body to form a honeycomb structure containing a cordierite component, and an amount of oil to be absorbed by the porous silica to be added to the forming raw material is in a range of 50 to 190 ml/100 g, and a BET specific surface area of the porous silica is in a range of 340 to 690 m2/g.

Abstract: The manufacturing method of the honeycomb structure includes a raw material preparing step of adding the powder of porous silica as the inorganic pore former to a forming raw material and kneading the forming raw material to prepare the kneaded forming raw material, an extruding step of extruding the obtained forming raw material to form a honeycomb formed body, and a firing step of firing the extruded honeycomb formed body to form a honeycomb structure containing a cordierite component, and an amount of oil to be absorbed by the porous silica to be added to the forming raw material is in a range of 50 to 190 ml/100 g, and a BET specific surface area of the porous silica is in a range of 340 to 690 m2/g.

Abstract: A manufacturing method of a honeycomb formed body includes a forming step of extruding a coupled forming raw material billet from a honeycomb body forming die to obtain a honeycomb-shaped formed product, the coupled forming raw material billet having a colorant applied on at least one of coupling surfaces between each forming raw material billets to be coupled; a cutting step of cutting the formed product to obtain a plurality of honeycomb formed bodies; and a separating step of separating the plurality of honeycomb formed bodies into a colorant-containing honeycomb formed bodies and a colorant non-containing honeycomb formed bodies.