How are separately serged seams usually pressed?

Separately serged seams are typically pressed open to help reduce bulk and allow for easier manipulation and alignment of the seams when assembling the garment. Pressing seams open helps to ensure that the stitching lies flat and that the garment maintains its shape and structure after construction. It also minimizes the risk of puckering or distortion in the fabric, which can occur if seams are pressed together or closed.

Pressing seams open allows for a cleaner finish on both the inside and outside of the garment, enhancing the overall quality and appearance of the sewing project. This technique is particularly important in areas where multiple seams intersect, as it helps maintain an even surface for any additional sewing or finishing techniques that may be applied.