How corozo buttons are made is one of the most fascinating stories in the world of garment trims: the raw material isn't mined or made from oil, it simply drops from a palm in the rainforests of South America. From gathering the tagua nut to the polished button on a jacket takes months and more than a dozen operations. In this article we follow the chain step by step and explain why every corozo button has a slightly different grain and a darker "eye".
What corozo is
Corozo, tagua or "vegetable ivory" is the seed of palms of the genus Phytelephas, which grow in the humid tropical forests of Ecuador, Colombia and Panama. The fruit grows in large clusters, and each seed initially contains a liquid similar to coconut milk. As it ripens and dries, that liquid turns into a hard white material that closely resembles ivory in look and density. Ecuador is effectively the only exporter of tagua discs, at around 1,000 tonnes a year.
Yellow Corozo buttons CB5001 with 4 holes
Dark grey corozo buttons CB5001 with 4 holes
White corozo buttons CB5001 with 4 holesStep 1: collecting the fallen fruit
The nuts aren't picked from the tree. They are gathered only after the ripe fruit falls to the ground on its own. That means the palm is neither felled nor harmed, and it keeps producing fruit for decades. Local communities collect the fruit, remove the outer husk and prepare the seeds for drying. Corozo thus becomes a source of income that makes keeping the forest standing more valuable than clearing it.
Step 2: drying, the longest phase
A fresh seed is soft, with a gelatinous interior. It has to dry until the endosperm hardens into the white, ivory-like substance. The nuts are sun-dried for several months, around three months and sometimes longer. There is no rushing this: if the seed isn't fully dry, it will crack or warp later on.
Why this matters to the buyer: properly dried corozo is stable, doesn't warp and stands up to washing. Drying quality is therefore a key factor in the quality of the finished button.
Step 3: peeling
After drying, the seeds are peeled to remove the thin brown skin. Beneath it lies the creamy white material. In places, traces of the skin remain on the surface, and these later produce the natural dark flecks and shading that some designs prize.
Step 4: slicing into discs
The nut is roughly the size of a hen's egg and has a small cavity at its centre. So a single seed yields only a limited number of discs, and their size depends on the cross-section of the nut. The seeds are cut into slices and round blanks are cut from them: discs of the required diameter and thickness. This is also why larger corozo buttons are harder to make: you need a bigger nut.
Step 5: shaping the profile
The discs are turned on a lathe to their final form: flat, rimmed, domed or dished. Corozo is worked slightly moistened, as the water softens it and allows precise turning, engraving and relief detail without cracking. The face of the button is shaped at this stage, and some styles also receive decorative engraving or a logo.
Step 6: drilling the holes
The holes, usually 2 or 4, are drilled with precision bits. The spacing must be consistent so the button can be machine-sewn. For shank buttons, a separate back is made.
Step 7: polishing
The buttons are polished in rotating drums with abrasive media, sometimes in several stages from coarse to fine. The result is a smooth surface with the refined matte or satin sheen typical of corozo.
Step 8: dyeing
A big advantage of corozo is that it takes dye deep into its structure, much like wood. That is why it comes in a wide range of colours, from white and beige to navy, brown and black. Because its density isn't perfectly uniform, the dye is absorbed slightly differently in different zones, creating natural depth of colour instead of the flat tone of plastic.
Step 9: inspection and sorting
Finally, the buttons are checked for cracks, uneven holes and colour defects, then sorted by size and shade.
Why every corozo button is unique
Corozo is a natural material and no two buttons are alike. The differences come from:
- the grain of the nut: fine lines, most visible in light colours;
- the dark "eye": the spot where the disc sat close to the centre of the seed or a remnant of the skin; after dyeing, it often shows as a darker dot or zone;
- uneven dye uptake, which creates slight shifts in tone.
For connoisseurs this is proof of authenticity: a plastic button is perfectly uniform, while corozo carries a trace of nature.
Corozo in practice
Corozo buttons are used on jackets, suits, coats, trousers, waistcoats and shirts. They are hard, scratch-resistant and, according to Spanish producers, tolerate washing, dry cleaning and ironing. In our range you'll find corozo buttons with 4 holes in more than 10 colours, from white and beige to navy, brown and black, in sizes from 15 to 25 mm, plus corozo trouser buttons. They are part of a wider range of natural buttons, alongside wood, coconut and shell.
Frequently asked questions
Is corozo a plastic?
No. It is an entirely plant-based material: the dried seed of the tagua palm.
Why do some buttons have a darker spot?
That is the natural zone near the centre of the seed. It is a sign of genuine corozo, not a defect.
Are corozo buttons suitable for vegan collections?
Yes. Corozo is a plant-based alternative to horn and mother-of-pearl, with no animal-derived materials.
Bul-tex supplies corozo buttons to ateliers and brands. For production quantities and special colours, get in touch, and for more advice browse our button articles.
