What does too little clamping pressure cause?

Too little clamping pressure during the adhesive application process primarily leads to a thick glue line. When there is insufficient pressure applied to the joint, the adhesive may not spread evenly or adhere effectively to the surfaces being bonded. This results in a thicker layer of glue remaining between the pieces, as the adhesive cannot be adequately squeezed out and flattened. Such a thick glue line can decrease the overall strength and integrity of the bond, as the bond may rely on both the adhesive itself and the wood-to-wood contact for maximum effectiveness.

Additionally, while weak bonds, separation of joints, and cracks in wood can be associated with improper clamping pressure, they are not directly linked to having a thick glue line. A thick glue line is a specific outcome of inadequate clamping that can lead to various problems later in the integrity of the joint. Therefore, focusing on proper clamping pressure ensures that the adhesive can form a strong, effective bond between the wooden surfaces.