 |
| A building
board was made from a 2 x 4-foot piece of ceiling tile glued to a 1/4-inch
backing of plywood, with the smooth back side of the tile available for
pinning. All photos by the author. |
|
|
| A building
board was made from a 2 x 4-foot piece of ceiling tile glued to a 1/4-inch
backing of plywood, with the smooth back side of the tile available for
pinning. All photos by the author. |