Methods of plugging a honeycomb body and mask layers thereof

A method of plugging a filter, comprising:

• positioning a mask layer over the filter comprising a plurality of intersecting walls, wherein the intersecting walls define at least one channel between the intersecting walls;
• perforating the mask layer proximate the channel to form a hole, wherein the hole extends along two or more of the intersecting walls such that the mask layer defines a flap extending over a center of the channel;
• passing a plugging mixture into the channel through the hole in the mask layer;
• and
• sintering the plugging mixture to form a plug within the channel.

A method of plugging a filter, comprising:

• positioning a mask layer over the filter comprising a plurality of intersecting walls, wherein the intersecting walls define at least one channel between the intersecting walls;
• perforating the mask layer proximate the channel to form a hole, wherein the hole extends proximate three of the intersecting walls such that the mask layer defines a flap extending over the channel;
• passing a plugging mixture into the channel through the hole in the mask layer;
• and
• sintering the plugging mixture to form a plug within the channel, wherein the three intersecting walls are adjacent one another.