What is glitter made of?

You know the moment. You open a jar of glitter, tip it out, and a small galaxy ends up on the counter, the floor, and somehow the inside of your phone case. It is hard to think of a less likely industrial product — yet the stuff in front of you was made on machines that cut film to tolerances measured in fractions of a millimetre, and the material choices behind it are deliberately engineered.

That matters if you are buying it. Two glitters that look identical in the jar can behave completely differently in gel polish, in resin, or against skin — because one is a PET film with a pigment layer and the other is dyed metal foil. The word "glitter" tells you neither.

That matters if you are buying it. Two glitters that look identical in the jar can behave completely differently in gel polish, in resin, or against skin — because one is a PET film with a pigment layer and the other is dyed metal foil. The word "glitter" tells you neither.

This article covers what each layer of glitter actually is, how the manufacturing process turns a roll of film into flakes, why craft and cosmetic glitter are cut into different shapes, and how to tell what you are buying before you commit to a bulk order.

Key Takeaways

• Glitter is a four-layer film: a plastic base (usually PET), a microscopic aluminum coating for reflectivity, a pigment or dye colour layer, and a protective lacquer — each one explaining a different property of the finished flake.
• Manufacturing is four steps: coating, rotary die cutting, sieving, and packaging. The sieve, not the customer, defines what counts as a given size grade.
• Craft glitter is hexagonal because hexagons tessellate — the most efficient shape to cut from a sheet with minimal waste. Cosmetic glitter skews smaller and rounder because rounded edges have no corner to abrade skin.
• Pigment versus dye is the solvent question. Pigment sits in the material and resists solvents; dye migrates, which is how glitter bleeds colour into gel polish or resin.
• Aluminum foil is the material behind most professional warnings about craft glitter — metal conducts heat under friction in a way PET does not.
• EU Regulation 2023/2055 restricts conventional glitter as a synthetic polymer microparticle, with deadlines staggered from craft (already restricted) through to nail cosmetics in 2035. Biodegradable, natural, and inorganic glitter are exempt.

What Glitter Is Made Of: The Four Layers

A single flake of conventional glitter is a stack of four thin layers. Each one has a different job, and each one explains a different property of the finished product.

Layer 1 — the base film. This is the structural material, and it is almost always a plastic. PET (polyethylene terephthalate, the same polymer family as polyester) is the most common because it is strong, flexible, and resists most solvents. PVC appears in cheaper lines. Aluminum foil is the third option, and it behaves very differently — more on that below.

Layer 2 — the reflective coating. A microscopic layer of aluminum is deposited onto the film, usually under vacuum. This is what makes glitter shine. Without it, coloured film reads as flat plastic. The aluminum layer is thin enough that it does not change how the flake feels, but it is the reason a flake reflects light from any angle rather than only from the front.

Layer 3 — the colour. Colour comes from pigments or dyes applied over the metal layer. This distinction matters more than most buyers realise: pigment sits in the material, while dye is more likely to migrate when it meets a solvent. This is why a dye-based glitter can bleed colour into surrounding gel polish or resin.

Layer 4 — the protective coat. An outer lacquer seals the colour and adds resistance to moisture, solvents, and handling. It is also where special effects live: holographic coatings that shift colour with angle, iridescent coatings that reflect two or three hues, and glow-in-the-dark or UV-reactive finishes.

Four layers, and each one can be swapped. That is how a single factory produces thousands of "styles" from a handful of base materials — and why two glitters at the same price can have completely different performance. The Wikipedia definition of glitter — "flat, small, reflective particles that are precision cut" — captures the same point more briefly.

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How Glitter Is Made: From Film Roll to Finished Flake

The manufacturing process is short but precise, and every step leaves a fingerprint on the finished product.

Step 1 — Coating

The process starts with large rolls of film, which look more like packaging material than anything decorative. The film runs through a vacuum chamber where aluminum is deposited onto one side, then through a colouring stage where pigment or dye is applied, then through a top-coat stage for the protective lacquer.

The order and thickness of these layers determine almost everything downstream: how bright the flake reads, whether it will hold colour in a solvent, and whether special effects like holographic shift are possible.

Step 2 — Cutting

The coated film is then cut into flakes. This is not shredding — it is precision die cutting, usually on a rotary cutter: effectively a large roller studded with microscopic blades that punches through the film as it feeds through, producing millions of identical particles.

The shape is a design decision, not an accident. Craft glitter is most often cut into hexagons, because hexagons tessellate — they pack tightly against each other on the sheet, which minimises waste between cuts. Squares appear when a different visual effect is wanted. Specialty cutters produce stars, circles, and diamonds, at higher cost and lower yield.

Size is set at this stage too, and the range is wide. Craft glitter might run a full millimetre across — large enough to read clearly on paper. Cosmetic glitter is far smaller, sometimes under a tenth of a millimetre, which is what lets it sit on skin as a soft shimmer rather than as visible shards.

Step 3 — Sieving

Freshly cut glitter is not yet consistent. It carries dust, irregular fragments, and pieces that missed the blade cleanly. Manufacturers run it through a series of screens and filters that sort it by size and discard anything too large, too small, or jagged.

This is why glitter is sold in size grades rather than as a single product, and why "0.008 inch" and "0.015 inch" are meaningful specifications rather than marketing decoration. The sieve, not the customer, decides what counts as a given size.

Step 4 — Packaging

Finished glitter is packed into bulk bags for industrial buyers or into the shakers and packets sold at retail. This is the messiest step in the plant, and the one workers remember: a single escaped pinch travels.

The full process is worth watching once, because the scale is genuinely surprising:

What that sequence shows is the thing most articles skip: glitter is not a craft material that happens to be manufactured, it is a precision film product that happens to be decorative.

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Why Craft Glitter Is Hexagonal and Cosmetic Glitter Is Round

The shape of a glitter flake looks decorative. It is actually a manufacturing and safety decision, and it is one of the clearest signals of what a given product was built for.

Hexagons pack efficiently. When a rotary cutter punches a pattern into a sheet, the gaps between shapes are waste. Hexagons tessellate almost perfectly, so a hexagonal pattern leaves very little film unused. That is why the default craft glitter shape is a hexagon: it is the cheapest way to cut a sheet into millions of flakes.

Rounded particles are gentler on skin. Cosmetic glitter tends toward smaller sizes and rounder shapes. A rounded edge has no corner to catch on skin or abrade it, and a smaller particle sits as shimmer rather than as grit. This is not a marketing claim — it is the same reason cosmetic-grade glitter is specified differently from craft glitter in professional nail guidance.

Size determines how it handles. Fine particles (roughly 0.004"–0.015") suspend in liquid and read as a smooth finish. Chunky particles (around 0.1" and up) sit on the surface and read as texture. Neither is better; they solve different problems. If you are choosing between them for a project, our comparison of chunky vs fine glitter covers coverage and application for each.

What this means practically: shape and size are not cosmetic details, they are the specification. A jar that says only "glitter" has not told you what you are buying.

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The Materials Behind the Shine

Four materials do most of the work, and each one explains a property you can observe.

Aluminum — the reflectivity

The aluminum layer is what makes glitter reflect rather than merely look coloured. It is deposited in a vacuum chamber at a thickness measured in nanometres, and it is the reason a flake catches light from almost any angle. It is also the layer that makes conventional glitter non-biodegradable: aluminum does not break down in the environment on any useful timescale.

Titanium dioxide — the white and the opacity

Titanium dioxide is a white pigment and a common opacifier. It creates the base brightness in silver and white glitters, and it is often used underneath other colours to make them read as solid rather than translucent.

Iron oxides — the earth tones

Iron oxides produce reds, yellows, browns, and blacks. They are stable, lightfast, and inexpensive, which is why they appear across so many colour lines. Gold and bronze glitters very often get their warmth from an iron oxide layer rather than from anything metallic.

Mica — the mineral option

Mica is a naturally occurring mineral that has been used as a decorative shimmer for thousands of years — some of the oldest cave paintings include mica flakes. Modern mineral shimmer is mined, milled, and usually coated, and its behaviour depends heavily on what it has been coated with. Mica-based products are often marketed as natural, but the coating is still a manufactured layer and worth asking about.

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PET vs PVC vs Aluminum Foil: What Actually Changes

Three base materials cover most of the market, and the differences are practical rather than academic.

Base material	Best for	Solvent resistance	Heat behaviour	Notes
PET film	Resin, gel polish, cosmetic use	Good — resists most solvents	Does not conduct heat the same way as metal	The default for cosmetic-grade and solvent-resistant lines
PVC film	Cheaper craft lines	Moderate	Softens at higher temperatures	Less common in cosmetic use
Aluminum foil	High-shine craft, some industrial use	Varies by coating	Conducts heat quickly	Brightest finish; the material behind most professional warnings about craft glitter

The aluminum foil row is the one that matters most if you work with nails. Metal conducts heat under friction, so a foil-based glitter heats up during filing in a way PET does not. That is a mechanical problem before it is a chemical one, and it is the reason professional guidance distinguishes craft from cosmetic grade so sharply. We covered that distinction in detail in is glitter toxic.

PET's advantage is not that it is "natural" — it is a plastic — but that it is predictable. It holds colour, resists solvents, and behaves the same way batch after batch, which is what makes colour matching possible at production scale.

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A Short History: From Cave Walls to 1934

Sparkle is older than manufacturing. Archaeologists have found mica dust, malachite, and crushed minerals applied to bodies tens of thousands of years ago, and cave paintings over two thousand years old that include mica flakes for their shimmer.

The modern product has a specific origin. In 1934, a New Jersey cattle rancher and machinist named Henry Ruschmann worked out a way to precision-cut plastic film into thousands of tiny pieces. Those pieces became the product now called glitter, and Ruschmann founded Meadowbrook Inventions to produce it at scale. The company is still operating.

There is also a well-known detail about the industry that says something about how strange this product is. In a 2018 New York Times investigation into a major American glitter manufacturer, the company declined to name its largest customer. The reason given was that the customer did not want it known that their product contained glitter. Speculation followed, and it has never been publicly resolved.

The takeaway for buyers is not the mystery — it is that glitter manufacturing sits closer to precision film cutting than to craft supplies. The same capability that makes decorative flakes also serves industrial coatings, security printing, and specialty applications.

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Why Glitter Became an Environmental Question

For most of its history, glitter was a materials story. In the last decade it became a regulatory one, because conventional glitter is by definition a synthetic polymer microparticle — a microplastic.

The problem is structural, not incidental. Glitter is designed to be small, lightweight, and persistent, which is exactly the profile that makes a particle difficult to contain. It escapes during use, survives water treatment, and doesn't break down.

The aluminum layer doesn't biodegrade either, so the flake doesn't simply disappear over time. Peer-reviewed work in Marine Pollution Bulletin describes glitter as "an overlooked but potentially environmentally-valuable microplastic" — the phrase captures how late the research community arrived at the question.

The European Union acted on this directly. Commission Regulation (EU) 2023/2055, in force since 17 October 2023, restricts intentionally added synthetic polymer microparticles — a category that includes glitter. The implementation is staggered by product type rather than immediate:

Product category	Restriction applies from
Loose glitter sold as a craft material	Already restricted
Rinse-off cosmetics	16 October 2027
Leave-on cosmetics	16 October 2029
Make-up, lip and nail cosmetics	16 October 2035 (labelling required from 2031)

The regulation exempts glitter that is biodegradable, soluble, natural, or inorganic. That carve-out is what moved biodegradable glitter from a niche product to a compliance strategy in a short space of time.

The technical response exists. Plant-cellulose glitter is manufactured, cut, and coated much like conventional glitter but breaks down in the environment. Whether it matches conventional glitter on every performance dimension is still being worked out — biodegradability is a different property from solvent resistance, and a product can be strong on one and weak on the other.

For buyers, the practical question is which category your product falls into and where you sell it. If you ship to the EU, the deadline for your product type is fixed. If you buy for your own workshop, biodegradable glitter removes the regulatory question for craft applications entirely. The deeper compliance picture — including how EU rules compare with FDA requirements — is covered in our glitter regulations guide.

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How to Tell What You Are Buying

Everything above comes down to a few checks you can run on a listing or a jar before ordering.

1. Ask for the base material. PET, PVC, or metal foil. A supplier who cannot name it has not specified the product. This single question separates most of the market.

2. Check whether the colour is pigment or dye. Pigment-based colour sits in the material and resists solvents. Dye-based colour migrates. If you are putting glitter into gel polish, resin, or any solvent system, this is the difference between a stable result and a bleed.

3. Match the grade to the contact. Cosmetic grade for skin, eyes, lips, and nails. Craft grade for objects that won't touch a person.

This isn't a quality hierarchy — it's a specification hierarchy. Non-cosmetic-grade glitter isn't automatically unsafe; it simply hasn't been tested to the cosmetic standard. That distinction is worth holding onto, because it's the honest version.

4. Confirm the size in millimetres or inches. "Fine" and "chunky" are relative terms that vary between suppliers. A number is a specification. Sizes are sieved, not estimated, so a supplier should be able to tell you which grade you are getting.

5. Read the specification sheet, not the product name. For cosmetic lines, expect an MSDS and an explicit grade claim. For any line, the material and cut should be documented rather than implied.

A supplier working with cosmetic manufacturers will normally hold certification documentation and separate its cosmetic range clearly from general craft stock. Our cosmetic grade glitter range is listed separately for exactly this reason, and wholesale sourcing covers how material documentation is handled for bulk orders.

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Frequently Asked Questions

What is glitter made of?

Glitter is a thin film — most often PET plastic, sometimes PVC, aluminum foil, or mica — coated with a microscopic aluminum layer for reflectivity, coloured with pigment or dye, sealed with a protective lacquer, and precision-cut into flakes.

What is glitter made out of besides plastic?

Metal foil and mica are the two other common bases. Aluminum foil gives the brightest finish and conducts heat. Mica is a natural mineral that has been used as decorative shimmer for thousands of years and is usually coated in modern products.

Is glitter a microplastic?

Conventional glitter made from plastic film with a metal coating is classified as a synthetic polymer microparticle, which is a microplastic. That classification is why the EU restricts it under Regulation 2023/2055, with staggered deadlines by product category.

Why is craft glitter hexagonal?

Hexagons tessellate. When a rotary cutter punches a pattern into a film sheet, the gaps between shapes are wasted material, and a hexagonal pattern wastes very little. It is the most efficient shape to cut at scale.

Does glitter size actually matter?

Yes — it changes both appearance and behaviour. Fine particles around 0.004"–0.015" suspend in liquid and read as a smooth shimmer. Chunky particles around 0.1" and up sit on the surface as texture. The size is set by sieving during manufacture, so it is a real specification rather than a descriptive label.

Who invented modern glitter?

Henry Ruschmann, a New Jersey cattle rancher and machinist, worked out a method for precision-cutting plastic film into small pieces in 1934. He founded Meadowbrook Inventions to manufacture it, and the company still operates.

Is biodegradable glitter made the same way?

Broadly yes. Plant-cellulose film is coated, coloured, cut, and sieved using similar processes to conventional glitter. The difference is the base material, which breaks down in the environment rather than persisting.

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What to Remember

Glitter is a layered film product, and the layers explain everything about it. Plastic base for structure, aluminum for reflectivity, pigment for colour, lacquer for protection — then a precision cut that sets the shape and a sieve that sets the size.

Three habits cover most buying decisions:

Name the material before you buy. PET, PVC, and metal foil behave differently under heat, solvents, and skin contact. The word "glitter" describes none of them.

Ask for pigment, not just colour. It is the difference between a stable result in solvent systems and a bleed you discover after the fact.

Match grade to contact, not to price. Craft grade is reasonable for anything that will not touch a person. For skin, eyes, lips, and nails, specify cosmetic grade — and keep the distinction honest: non-cosmetic-grade does not mean unsafe, it means untested to that standard.

If you need to verify material and cut before committing to a bulk order, 10g sample packs let you test particle size, solvent behaviour, and colour stability on the actual material first.

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Reading Next

Keep exploring glitter materials and sourcing:

• Is Glitter Toxic? What Craft vs Cosmetic Grade Actually Means — the safety side of the same material question
• Chunky Glitter vs Fine Glitter: How to Choose and Apply Each One — how the sieved size grades change your process
• Cosmetic Glitter Regulations: FDA vs REACH Compliance Guide — the regulatory picture for cosmetic-grade lines
• Cosmetic Grade Glitter — the FDA-certified range, with MSDS available on request
• Biodegradable Glitter — the plant-cellulose alternative that meets the EU exemption