BRDA Plybond                                  

This is a rolling or peeling plybond test that is used exclusively for multi-ply products.  The test was developed years ago by BRDA, the Boxboard Research and Development Association (now RPTA, Recycled Paperboard Technical Association).

It is very good at detection poor bonding between plys in multi-ply products, but at the same time, it is not heavily influenced by the internal bonding of the individual plys.  This test has been used for multi-ply coated and uncoated  paperboard, as well as coated and uncoated cylinder board.