Patent ID: 8778045

Claim:
A method of manufacturing a cellular ceramic article comprising: providing a green cellular ceramic body comprising a binder material and a plurality of channels; and coating at least one of the plurality of channels that is intended to be plugged as an inlet channel with a slurry comprising a green coating composition and a solvent to form a coating layer on at least one of the plurality of channels that is intended to be plugged as an inlet channel; wherein the binder material comprises organic and inorganic binder materials; wherein the organic binder material is insoluble in the solvent and the at least one of the plurality of channels is unplugged when coated with the slurry; and wherein, subsequent to a firing step, the average pore diameter of pores in the coating layer is at least 5% smaller than the average pore diameter of pores in a wall on the channel on which it is coated.