Sandwashed Finish

Definition and Overview

Sandwashed finish is a finishing method that gives the surface fine irregularities, diffuses light, and creates a subdued appearance with reduced sheen. Because it is often created by blasting, it is also called a blast finish or sandblasting.

The degree of roughness, the strength of the luster, and the touch vary depending on the base material, processing method, and whether or not painting or coloring is applied. Sandwashed does not refer to a material name or button shape; it is mainly a term that describes the appearance of the surface.

Materials and Button Structure

Sandwashed finish is used for various buttons that can undergo surface processing, such as resin, metal, and natural materials. On transparent or semi-transparent resin, it may also be considered a design that combines a fine surface texture with a see-through effect.

It can be applied to pierced buttons such as two-hole, four-hole, and cat's-eye styles, as well as shank buttons. The number of holes and the shape of the shank are structural factors related to how the button is attached and its thickness, and should be checked separately from the sandwashed finish itself.

• For pierced buttons, select a needle and button-sewing thread suitable for the hole position and hole diameter.
• For shank buttons, check the shank height and buttonhole size according to the fabric thickness.
• For items with deep surface irregularities, conduct tests or practical checks to ensure that dirt does not remain.

How Sizes Are Shown and Applications

Button sizes are generally shown in lignes or mm. Since ligne is a conventional unit for buttons, it is important to confirm the correspondence between the ligne notation and the mm notation in planning documents and when placing orders, and to check the actual outside diameter as well.

Buttons with a sandwashed finish are used for shirts, blouses, jackets, coats, pants, dresses, and other items that call for a subdued attached accessory look. They are selected so that they match the appearance of nearby accessories such as the outer fabric sheen, hardware, and zipper.

How to Attach and Handling Precautions

Pierced buttons should be sewn on with appropriate clearance between the button and the fabric, and thread shanks should be made if necessary. On thick fabrics or positions subject to pulling, adding a reinforcing button on the reverse side helps distribute stress on the fabric.

Resistance to washing, dry cleaning, and ironing cannot be judged by the sandwashed finish alone. Depending on the base material and surface treatment, friction may change the gloss, or heat, detergent, solvents, and other factors may cause discoloration, cracking, or surface changes. Pretesting according to product conditions is necessary.

Avoid pressing the iron directly and strongly against the button. In particular, resin buttons may deform due to heat, and natural-material or coated items may crack, chip, or discolor. To reduce impact during washing, turning the product inside out or using a laundry net is also effective.

Differences from Similar Terms

Sandwashed weave is a textile term that describes the structure and surface feel of fabric. By contrast, sandwashed finish refers mainly to the processing and finishing applied to the surface of buttons and hardware, and the materials and forming methods involved are different.

Matte treatment may refer to a dull, non-glossy appearance, but the processing method and fineness of the surface are not uniform. Mirror finish is a finish that smooths the surface to create gloss, and it is the opposite of sandwashed finish, which diffuses light through fine irregularities.

Frequently Asked Questions