PC, PC/PBT & Pudding Keycaps: Complete Guide – Thekapco

PC keycaps use polycarbonate in part or all of the cap. PC/PBT keycaps combine polycarbonate and PBT components, but the exact construction must be checked product by product. Pudding keycaps describe a visual structure—usually opaque above and translucent around the lower sides—not one required material. None of these terms automatically guarantees shine-through legends.

That last distinction solves the question customers ask us most often. A keyboard can glow dramatically around every key while the printed letters remain completely opaque. The light and the legend are different systems, even when the product photograph persuades them to arrive at the party together.

Thekapco’s direct production experience is strongest in dye-sublimated PBT, UV-printed full-PC keycaps and mixed PC/PBT constructions. This guide explains what those structures can do, what their names do not prove and how to choose without shopping by acronym.

PC, PC/PBT and pudding at a glance

Term on a listing	What it usually tells you	What it does not prove
PC keycap	Polycarbonate is used in the cap; it may be clear, tinted, translucent or opaque	Exact transparency, legend method, scratch resistance, sound or construction quality
Full-PC keycap	The main cap body is polycarbonate	That the legend shines through or the cap is crystal-clear
PC/PBT or PCPBT	Both PC and PBT are used somewhere in the construction	One universal layer order, bonding process, material ratio or lighting result
Pudding keycap	The cap has a contrasting translucent lower/side region intended to expose more lighting	That it is PBT, doubleshot or compatible with every RGB keyboard
Shine-through legend	The legend is constructed to transmit backlight	That the whole keycap body is transparent or pudding-style

Pudding is a design category; PC and PBT are materials; shine-through describes an optical result at the legend. Keeping those categories separate prevents most misleading comparisons.

What polycarbonate means in keycaps

Polycarbonate, commonly shortened to PC, is a thermoplastic available in transparent and translucent grades. Its optical potential makes it useful for clear shells, tinted caps, side-lighting effects and artwork that interacts with keyboard LEDs.

The word “PC” is not a complete specification. Resin grade, pigment, wall thickness, surface texture, mould finish, coating and printed artwork can all change what the cap looks like. A smoky translucent cap and a water-clear cap may both be polycarbonate while behaving very differently under the same light.

Clear, translucent and opaque are different

Clear means objects or details can be seen through the material with relatively little diffusion.
Translucent means light passes through, but the view through the material is diffused.
Opaque means little or no visible light passes through.

Product pages often use “transparent” casually. Look at unlit and lit photographs and read the construction description before deciding how much of the switch or LED will be visible.

Colour changes the lighting effect

A dark tint can absorb more visible light than a pale or uncoloured section. A frosted surface can spread light more softly than a clear polished one. Neither result is automatically better: some people want an obvious view of the switch; others want a diffused halo rather than an LED-shaped spotlight.

What PC/PBT means

PC/PBT tells you that both polycarbonate and PBT are present. It does not tell you exactly where they are or how the pieces were made. One product may use a translucent PC lower section with a PBT top; another manufacturer may use a different multi-part or layered construction.

Treat the slash as a prompt to read the diagram—not as an industry recipe.

Why combine the materials?

A mixed construction can assign different jobs to different areas. A translucent PC section can expose or diffuse more light, while an opaque PBT top can carry the artwork and familiar surface finish. It also creates a visible boundary that becomes part of the design.

Ask for the layer map

Before buying, check:

which part is PC;
which part is PBT;
whether the cap is one moulded piece, multiple moulded sections or another construction;
how the legend is produced;
which areas transmit light.

The answer can differ between sets. “PC/PBT” without the map is a headline, not the full report.

What pudding keycaps are

Pudding keycaps typically place an opaque or less-translucent upper section over a translucent lower body or sidewall. When the keyboard LEDs are on, more light can escape around the sides than through a conventional opaque cap.

The name describes the layered appearance. It does not mandate PBT. HyperX currently sells an ABS pudding set with a translucent dual-layer style, while Razer’s Phantom set uses ABS with translucent sides. Those official products provide a useful correction to the common claim that pudding automatically means doubleshot PBT.

Pudding and PC/PBT can overlap

A PC/PBT cap with translucent PC sides can create a pudding-like effect. But not every PC/PBT construction must use that visual layout, and not every pudding cap must combine PC and PBT. Describe the particular product instead of turning overlapping categories into synonyms.

The design still needs an unlit life

Consider how the cap looks when RGB is off. Translucent sections may become subdued, legends may rely on ambient light, and a dark top can look very different without illumination. A product photograph shot in a dark studio shows one operating condition, not the other twenty-three hours of the day.

Body glow versus shine-through legends

A translucent body or sidewall allows light through part of the cap. A shine-through legend allows light through the letters or symbols themselves. One does not guarantee the other.

Thekapco’s dye-sublimated and UV-printed legends should not automatically be described as shine-through. Some PC-based sets produce a strong illuminated body or side effect while the artwork remains opaque. The exact product construction controls the answer.

Questions to ask in the correct order

Does the body or sidewall transmit light?
Does the legend transmit light?
Is the legend readable with the lighting off?
Where is the keyboard’s LED relative to the legend?

That order is more useful than asking only, “Does it work with RGB?” Almost every cap can sit on a lit keyboard; the meaningful question is what you expect the light to do.

Printing method is a separate specification

UV printing, dye-sublimation, doubleshot moulding and laser-based methods describe how the legend or artwork is created. Material can limit or enable certain processes, but no single “PC” or “pudding” label proves the method. Our dye-sublimation versus doubleshot guide explains those processes.

Why lighting results vary

The same keycap set can look different on two keyboards. Relevant variables include:

LED position and brightness;
north-facing or south-facing placement;
switch-housing colour and transparency;
plate colour and reflectivity;
cap colour, wall thickness and surface diffusion;
legend location;
room lighting and camera exposure.

No responsible comparison should promise an exact RGB result from the keycap name alone.

Photographs can exaggerate or hide glow

Long exposure, high brightness, a dark room and image processing can make illumination look stronger and more even. For a useful comparison, look for the same keyboard, light level, camera exposure and room conditions across both sets.

Wider keys can illuminate unevenly

A single LED may sit away from part of a wide legend or sidewall. Spacebar, Enter and Shift can therefore look different from 1u letter keys. This is a keyboard-and-cap interaction rather than automatic evidence of a defective material.

Texture, feel and surface finish

PC keycaps are often described as smooth, while PBT is often described as textured. Those are market tendencies, not laws of chemistry. Mould texture, coating, polish and finishing can make two caps made from the same broad material feel different.

A PC/PBT construction may put PBT where the fingertip lands and PC around the sides, creating one feel on top and a different optical effect below. Read the actual construction before assigning a whole-set texture.

Gloss can be intentional

A polished transparent cap may need a glossy surface to achieve its intended visual clarity. Gloss is not automatically wear. Conversely, a matte texture can become smoother at high-contact positions over time. Compare a used cap with an unused key from the same set before diagnosing change.

Sound and thickness

Material is one contributor to keycap sound, but the keyboard case, plate, mounting style, switches, stabilisers, foam, cap thickness and typing force all participate. “PC equals clacky” or “PBT equals thocky” is not a reliable universal rule.

The previous version of this article claimed PC caps were generally thicker, heavier and more “thocky.” Those conclusions were too broad. Thickness and mass are designed into a particular cap; they cannot be inferred safely from the material name alone.

Compare on the same keyboard

If sound matters, change only the keycap set, keep the keyboard and recording position fixed, and match typing force as closely as practical. Describe the result as an observation from that setup—not a property guaranteed to repeat everywhere.

Durability, ageing and scratches

Polycarbonate is selected for many engineering applications because grades can combine transparency with impact strength. That does not make every PC keycap scratch-proof, chemically invulnerable or immune to ageing. Surface finish, additives, coatings, exposure and care matter.

The old article claimed high scratch, chemical and UV resistance while also saying PC was prone to yellowing. It then promised decades of appearance. Those statements were internally inconsistent and much more certain than the product evidence allowed, so they have been removed.

Separate body wear from legend wear

A scratch in the plastic, a polished fingertip area, a loose stem socket and a fading printed legend are different failure modes. The legend method and surface treatment matter as much as the material beneath them.

Cleaning and care

Start conservatively: remove loose dust, use a soft cloth, and follow the exact product’s care instructions. For washable removable caps, mild soap and lukewarm water are safer starting points than strong household solvents. Rinse away residue and allow the caps to dry completely before reinstalling them.

SABIC’s guidance for LEXAN polycarbonate sheet recommends mild soap with lukewarm water and warns against abrasive, highly alkaline and several aggressive solvent cleaners. A finished keycap can include inks, coatings, adhesives or another plastic, so its maker’s instructions take priority over general PC guidance.

Avoid improvised solvent tests

Do not use acetone, nail-polish remover, fuel, harsh alkaline cleaner or abrasive pads on the assumption that “polycarbonate is chemical-resistant.” If a stain needs more than mild cleaning, ask the product maker. The cure should not become the new defect.

For general plastic-material differences before cleaning, use our ABS versus PBT guide. A dedicated material-by-material cleaning guide is being prepared separately.

Compatibility and kit coverage

PC, PBT and pudding describe material or construction—not switch fit. Confirm the stem mount, ANSI/ISO/JIS layout, keyboard size, spacebar, bottom-row modifiers and every key supplied.

Thekapco keycaps are designed for MX-style cross stems, but each set’s included-key diagram remains the final authority. A dramatic glow cannot compensate for a missing right Shift, although it may illuminate the empty switch beautifully.

Check wide-key construction

Spacebars and other wide caps need the correct size and stabiliser mounting positions. A mixed-material or translucent design can also look different across wide spans, so inspect product-specific images and specifications.

How Thekapco uses PC and PBT

Thekapco currently sells keycaps made primarily from PBT and polycarbonate. Our first-hand production experience is strongest in dye-sublimated PBT and UV-printed PC, including the colour correction, print margins, alignment work and repeated sampling required to translate screen artwork into a physical set.

Examples of current construction approaches include:

mixed PC/PBT sets such as Nekomancer, where the approved product description identifies a translucent PC lower section and PBT upper section;
full-PC keys with UV printing within the Junji Ito range, alongside separate PBT keys using dye-sublimation;
dye-sublimated PBT artwork on collections such as The Peanuts by Schulz.

These examples show different design tools, not a league table. The best construction is the one that can execute the artwork, lighting and use case while passing the product’s quality and compatibility checks.

What we verify before making a product claim

We separate the cap body, legend, printing method and layout. If a product allows light through its PC sides but not its printed legend, we say exactly that. Product-specific descriptions and the current included-key diagram take priority over catalogue-wide shortcuts.

How to choose

Choose full-PC when transparent or translucent body artwork is central to the design and the exact surface and legend treatment suit you. Choose PC/PBT when you want a mixed construction that assigns visual and contact-surface roles to different materials. Choose pudding-style when side lighting is the main objective, after checking how the legends behave both lit and unlit.

In every case, compare the actual product—not an idealised category.

Five questions before buying

Which sections are PC, PBT, ABS or another material?
Does the body glow, do the legends shine through, or both?
Is the effect shown with the lighting off as well as on?
Does the exact kit fit my stem, layout, spacebar and modifiers?
What cleaning method does the maker approve?

Frequently asked questions

Are PC keycaps transparent?

They can be clear, tinted or translucent, but PC is not automatically water-clear. Pigment, texture, wall thickness and resin grade change the result. Inspect the exact cap in lit and unlit conditions.

What does PCPBT mean?

It means the keycap construction uses both polycarbonate and PBT. The term does not define one universal layer order or manufacturing process, so check the product’s construction diagram.

Are pudding keycaps always PBT?

No. Pudding describes a translucent-sided visual structure. Official HyperX and Razer examples use ABS, while other products use PBT or mixed materials.

Do PC or pudding keycaps have shine-through legends?

Not necessarily. The body or sides may transmit light while the legend remains opaque. The product must specify or demonstrate legend transmission separately.

Are PC keycaps more durable than PBT?

There is no useful universal ranking from the material name alone. Resin grade, wall design, stem tolerances, finish, legend method, exposure and care all affect service life. Compare a specific product and defect type.

Do PC keycaps sound deeper?

Not automatically. Cap thickness and shape, the keyboard structure, switches and typing force can outweigh a broad material label. Use a controlled same-keyboard comparison if sound is important.

Can I clean PC keycaps with alcohol or acetone?

Do not improvise with strong solvents. Polycarbonate grades, coatings and inks have different chemical resistance, and acetone is specifically excluded in major PC care guidance. Start with the maker’s instructions, mild soap, lukewarm water and a soft cloth.

Final checklist

☐ I know which part of the cap uses each material.
☐ I separated body glow from shine-through legends.
☐ I checked lit and unlit appearance.
☐ I did not infer sound, thickness or durability from the acronym alone.
☐ I matched stem, layout, sizes and included keys.
☐ I have the product-specific cleaning guidance.

Article method and source note

Written by: Thekapco Editorial Team

Technical review: Timo, Senior Executive at Thekapco

Publication date: 24 September 2026

Last reviewed: 14 September 2026

This guide combines current product definitions with Thekapco’s approved first-hand experience in PBT, full-PC and mixed PC/PBT collections. It avoids universal performance claims where resin grade, cap design or keyboard setup controls the outcome. Published product examples must be checked again against their live descriptions immediately before implementation.

Primary and product references:

Coverage benchmark reviewed:

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