Shell Button
A shell button is a button made by processing shell, and it is a garment accessory that makes use of the natural luster and color variation from nacre and other materials, and is mainly used for shirts, blouses, and jackets.
Definition and Overview
Shell buttons are buttons made by cutting, polishing, and drilling shell. The luster, translucency, color variation, and patterns that come from the material vary from piece to piece, giving them a look that differs from uniform industrial products. Shell button and natural shell button are also terms generally used to refer to buttons made from shell materials.
Depending on the type of shell, the color, luster, thickness, and hardness tend to differ. Examples include trochus shell, mother of pearl shell, and black lip shell, and even within the same type, the appearance changes depending on the part collected and the processing method. When planning, confirm on the assumption that the color tone and pattern of the sample and mass-produced items will not match exactly.
Material and Structure
Typical shell buttons often have two-hole or four-hole styles that pass through the front and back. Two-hole styles have a clean appearance, while four-hole styles make it easier to ensure stability when sewing. The cat-eye shape, with recessed areas around the holes, is designed so that the thread does not easily float above the surface.
Shell buttons also come in shank styles with a post on the back. Shank buttons make it easier to create a slight gap from the garment body and are used on thick fabrics and buttonholes. However, because shell is hard and vulnerable to impact, designs that place excessive force on thin edges or around the holes should be avoided.
- Two-hole and four-hole: flat styles sewn on by passing thread through the holes.
- Cat-eye button: a style with a groove between the holes that helps the thread sit neatly.
- Shank button: a style attached by passing thread through the shank on the back.
How Size Is Expressed
The size of a button is shown by diameter in mm, and also in lignes. Lignes are a traditional size unit used for buttons, and in specifications, sample cards, and purchase orders they may be shown together with mm notation. When ordering, confirm not only the nominal size but also the tolerance of the actual dimensions and the thickness.
Even with the same diameter, the feel and appearance change depending on the thickness, roundness of the edge, hole size, and shank height. The buttonhole length should be set by considering the button's maximum diameter and thickness, and before mass production it is important to perform opening and closing tests under the actual fabric, interfacing, and sewing conditions.
Main Applications and Selection
Shell buttons are used for shirts, blouses, cardigans, dresses, jackets, and more. Smaller ones are used for plackets and cuffs, while larger ones are used for jacket front openings and similar areas. Choose the shell type, finish, and shape according to the fabric's luster, color, thickness, and washing method.
Light-colored shell buttons blend easily with shirts and blouses, while those with dark tones or iridescent luster can also serve as a design accent. Because they are natural materials, it is important to define as part of the specification how closely the appearance should be matched between the left and right front panels and within a single garment, and to share the sorting standards with the production source.
How to Attach and Handling Precautions
Holed shell buttons are sewn on with button thread, and a thread shank is added as needed. Thread shanking is a method of reinforcing the button by wrapping thread around the thread stem created between the button and the fabric. When the fabric is thick or the buttonhole becomes thick, providing an appropriate thread shank helps reduce the load during opening and closing.
Whether washing, dry cleaning, and ironing are permitted depends on the care label of the entire product and the resistance of the attached parts, not the button alone. Shell buttons may crack or chip under strong impact, pressure, or sudden temperature changes. Do not apply the iron directly; confirm in advance the pressure used during pressing and whether a pressing cloth is required.
Exposure to bleach, chemicals, sweat, cosmetics, and similar substances may change the surface luster and color tone. For products that are washed, dyed, or processed, conduct tests assuming the chemicals and steps to be used, and check for cracking, chipping, discoloration, and loosening at the sewing area.
Frequently Asked Questions
What is the difference between shell buttons and trochus shell, mother of pearl shell, and black lip shell?
Shell button is the general name for buttons made from shell material. Trochus shell, mother of pearl shell, and black lip shell indicate the types of shell used as the material. Since the degree of whiteness, iridescent luster, dark coloration, thickness, and similar characteristics differ by type, choose according to the desired appearance and application.
Can shell buttons be washed at home?
Whether washing is allowed depends on the product's care label. Shell buttons are hard, but they can chip from impact during washing or contact with other attached parts. Use a laundry net and avoid strong spin drying and tumble drying; handle them according to the product care instructions and the resistance of the attached parts.
Should shell button sizes be specified in mm or lignes?
In specifications and purchase orders, using both mm and lignes together is effective to prevent misunderstandings. However, in actual selection, confirm not only the diameter but also the thickness, hole diameter, and shank height. In particular, compatibility with the buttonhole should be judged by checking opening and closing with the actual item.
