Silk organza is woven by a number of mills, it has a smooth, flat finish, is strong and durable, and gets its stiffness from tightly twisted yarns. This fabric is also used as an interfacing where sheerness is a factor, silk organza pinafores and Peter Pan collars are traditional for little girls. It is used for weddin gowns, curtains, tablecloths, bags, party decor as well as many other applications.
Silk gauze is a sheer, thin fabric made of fine but very strong silk threads. The stability of the fabric is increased by the interlocking weave, also known as a leno structure. This weave, or structure, prevents the threads from shifting, which decreases the risk of tearing, pulling, and fraying of the canvas. Silk gauze is available in several weights and widths. It is also found in many different holes per inch (HPI), which is similar to the thread count of cotton fabric. The higher the HPI number, the smaller the number of holes in the canvas. Silk gauze is lightweight and sheer qualities make it ideal for use as a facing or lining. It is commonly used in evening wear, dresses, veils, scarves, costumes, or layered over other fabrics.
Silk organza is heavier and crisper than silk gauze, silk gauze is actually much more loosely woven. Silk organza can generally be used in most applications where gauze is appropriate, although it is heavier and stiffer with a closer weave structure. Both fabrics are sheer and delicate, and can be difficult to discern to the untrained eye.