Hotel key cards: materials, technology and how to choose

A key card is the first physical object a guest holds at check in. It also has to work on every door, on every floor, for the whole length of a stay. Those two jobs pull in different directions, and most ordering mistakes come from deciding one without checking the other.

This guide covers the three things that decide which card a property should order: the material, the chip and its compatibility with the lock system, and the finish.

The order of those three matters. Material is the decision everybody enjoys making and it is the one that can be changed late. Compatibility is the decision nobody enjoys making and it is the one that cannot be changed at all once cards are printed. A property that settles the chip first and then chooses the body has an easy project. A property that does it the other way round sometimes has a warehouse full of beautiful cards that do not open doors.

01. How hotel key cards got here

Key cards have been through three phases, each shaped by what properties needed at the time.

1. Magnetic stripe

Introduced in the 1970s, the magstripe replaced metal keys and let the front desk reprogram access without changing hardware. It dominated for decades and is still in service in many properties.

2. RFID

The guest holds the card near the reader instead of swiping it. RFID cards are more durable, cannot be demagnetised, and support zone access, time windows and audit trails.

3. Material choice

The technology inside is now settled. What changed is what the card is made of. Wood and recycled plastics are both in normal production, and property groups increasingly choose the body material against their environmental commitments rather than only against cost.

A fourth phase is under way and is not yet a material question at all: the migration to properly encrypted credentials. A great many estates still run chips whose cryptography has been broken for years, and the industry is moving to AES based credentials in response. That is a chip and firmware project rather than a card body one, and it is covered in the guide to AES on hotel lock estates.

The card is a brand object before it is a tool

Material, weight and finish say something at check in before anyone reads the print on it. That is why the material decision is worth as much attention as the chip.

02. The card body: PVC, recycled PVC and wood

The material decides the cost, the environmental profile and what can be done to the surface. The card body does not decide whether the card works, which is the chip's job.

PVC

The industry standard, from 0.40 to 1.0 mm. Offset and silkscreen printed, laminated, gloss or matt. Takes a magnetic stripe, a contact chip, a signature panel and security features. See PVC and recycled PVC cards. The standard thickness for a hotel card is 0.76 mm, which is what every encoder and card holder is built around; the guide to thickness and lamination covers when to depart from it and what that costs. The CR80 dimensions and tolerances guide sets out the 85.60 by 53.98 mm outline and the corner radius that encoders and holders are built around.

Recycled PVC

The same dimensions and the same production route as standard PVC, so nothing changes in issuance or encoding. It is the step that adds an environmental credential without changing a single operational habit. What it does and does not let a property claim in a tender is set out in the recycled PVC guide.

Wood and bamboo

Basswood, cherry, black walnut and bamboo, at 1.20 to 1.30 mm. Laser engraved, offset printed and encoded. Wooden cards are produced at an FSC certified facility (FSC-C195226). What a wooden card changes, and what it does not, is covered in a separate guide.

PET

Less common in hotels and worth knowing about, because it is specified for a physical reason rather than an environmental one: it handles heat and chemical exposure considerably better than PVC. Where cards live in vehicles, near plant or in a spa environment, PET is the body that does not warp.

What each body can carry

The three bodies do the same things. They are all CR80, they all take RFID and NFC, they all take a magnetic stripe and full colour print. Laser engraving and the natural grain are the only two that separate them, and both belong to wood and bamboo.

Minimum order is 500 units. What a minimum order is actually for is covered separately.

03. Chips, frequencies and lock compatibility

The wrong chip or the wrong frequency produces cards that do not open doors. It is the single most expensive ordering mistake, and it is entirely preventable. What actually decides compatibility is covered in full in a separate guide.

125 kHz, low frequency

Older technology, still widely installed. Chips include EM4200 and T5577. Common in legacy systems.

13.56 MHz, high frequency

The current standard, and what NFC means in practice. Chips include MIFARE Classic EV1, DESFire EV2 and EV3, NTAG and ICODE SLIX. Supports encryption and stronger authentication, and which of those chips to specify depends on what a copied card would cost you.

UHF, 860 to 960 MHz

UHF buys read range, and it is specified where a credential has to be read at distance rather than on contact. Read range is set by the antenna and by what surrounds the card as much as by the frequency, which the antenna and read range guide explains for two cards carrying the same chip.

Estates running two generations at once

Very few properties replace every reader in one go. Where a refurbishment has left two reader generations on the same site, a dual frequency card carries both credentials in one body so staff and guests hold one card instead of two. How that works, and what it does not solve, is covered separately.

Lock systems the cards can be encoded for

Cards can be encoded for ASSA ABLOY VingCard, for SALTO, for dormakaba, for Onity and for Saflok. Encoding depends on the chip and on the system's technical requirements, keys and authorisation, so it is a confirmation to request against one named lock model rather than a general capability to assume.

The chips Kaway encodes routinely are EM4200 and T5577 at 125 kHz, MIFARE Classic EV1 1K and 4K, MIFARE Ultralight EV1, MIFARE DESFire EV2 and EV3, NTAG213, NTAG215, NTAG216 and ICODE SLIX at 13.56 MHz, and UHF Impinj Monza and Alien H3. EM4200 is read only. T5577 reads and writes. On the high frequency chips, reading and writing follow the characteristics and permissions of the chip itself. Encoding is done at the plant: UID reading, sector and block writing where the chip allows it, and NFC URL and NDEF encoding on compatible chips. See RFID and NFC cards for the range.

Confirm compatibility in writing before production, not after delivery

Send the lock or reader model already installed at the property. Kaway confirms the chip against that model in writing before anything goes into production. A general claim that a supplier works with a lock brand is not the same as a confirmation that names the model.

Can one card carry both a magnetic stripe and a chip

Yes. Combination cards are common in properties moving between systems, where some doors still read the stripe and others read the chip. They are available across the card bodies above. A magnetic stripe has to be specified as HiCo or LoCo to match the encoder the property already runs, and the magnetic stripe guide sets out which one a hotel needs.

Who writes the data

A separate decision from which chip. Cards can ship blank for the property to encode at issuance, pre encoded at the factory with a UID list, or somewhere between. For a guest room system the first is almost always right, because it keeps the keys inside the property. The encoding guide sets out all three routes.

04. Print, engraving and finishes

The finish available on a hotel key card is decided by the card body, not chosen independently of it: laser engraving belongs to wood and bamboo, and soft touch lamination belongs to PVC and recycled PVC. Every card is produced to order, so the branding and the specification are built in from the start rather than applied to stock. Which printing method suits which run is a separate decision, and the full range sits on the capabilities page.

1. Full colour print, both sides

Offset and silkscreen on PVC, recycled PVC and wood. Pantone matching, gradients and photography, laminated against wear.

2. Laser engraving

On wood and bamboo. A permanent, tactile finish that can be combined with print on the same card.

3. Surface finishes

Gloss, matt and soft touch on PVC and recycled PVC. Natural grain on wood, which varies between species and is part of the point.

4. Security and detail features

UV printing, microtext, guilloche, hologram and hot stamping. Spot UV puts a gloss highlight on specific areas of a matt card, and embossing raises a texture. Which of those are worth paying for depends entirely on whether anybody at the property will actually check them, and the guide to security features is blunt about which ones earn their cost.

5. Personalisation and encoding

Variable data, sequential numbering, barcodes and QR, chip encoding with a UID list, magnetic stripe encoding, signature and scratch panels. How to specify a numbering range properly is worth five minutes before the first order, because it is the part of a card that a reprint cannot fix cheaply.

05. Matching the card to the property

The card body follows the property, and four things describe the property: the tier, the lock system already installed, the environmental commitments the group has published, and the annual volume. There is no single right body for a hotel, which is why the pattern below is written segment by segment rather than as one recommendation.

Five star and boutique

Wood or bamboo. The material is felt at check in, the grain makes each card slightly different, and it reads as a considered material choice.

Four star and full service

Wood or recycled PVC. Wood if the environmental commitment is public and needs a visible object behind it. Recycled PVC if the priority is a credible step that changes nothing operationally.

Three star and branded chains

PVC or recycled PVC. Standard PVC at volume, or recycled PVC for the same operational behaviour with a better environmental profile.

High volume and extended stay

PVC. Durability per unit matters most where cards stay in circulation longer and get reissued often.

Staff, housekeeping and back of house

Often the wrong object entirely. A credential carried on a belt all day and dropped on hard floors lasts far longer as a moulded key fob than as a card, and a spa or pool area is usually better served by a wristband. All three carry the same chip, so a property can mix bodies without touching the access system.

06. What to ask before you order

Four questions separate a supplier who has read the brief from one who has not, and each one asks for evidence rather than for reassurance. A wider comparison, including why price per card is not the real cost, is set out in the guide to comparing hotel key card suppliers.

1. Will you confirm compatibility in writing, naming my lock model?

Ask for confirmation that names the brand and the model number you run, issued before production rather than after delivery. A general statement about a lock brand is not an answer. What a reader datasheet does and does not prove about a card is set out in the reader datasheet guide.

2. How do you keep the chip and the configuration consistent between batches?

Repeatability is what stops a second order behaving differently from the first. Ask what the change control procedure is, and who controls chip sourcing and encoding. At Kaway it happens on one floor, which is the short version of the answer, and the reordering guide is the long one.

3. Can I test a sample against my doors first?

A sample encoded for your actual system, tested on real doors across more than one zone, catches problems that an encoding station never will. The same discipline applies to the full delivery, and what to inspect before accepting a pallet is a short checklist worth running on the first batch.

4. How should an FSC claim be checked?

FSC claims are specific to products and orders. Wooden cards are produced at an FSC certified facility (FSC-C195226). Any certificate number can be checked at search.fsc.org, and it is worth checking what the scope actually says rather than accepting the logo. Lead times, minimum quantities and the rest of the commercial detail sit on the FAQ.

07. Technical references

• ISO/IEC 7810:2019 sets the physical characteristics of the ID-1 format this guide calls CR80, including the 85.60 by 53.98 mm outline and the 0.76 mm nominal thickness: iso.org/standard/70483.html.
• ISO/IEC 14443-2:2020 defines the radio frequency power and signal interface at 13.56 MHz, the band the MIFARE, NTAG and ICODE chips listed above work in: iso.org/standard/73597.html.
• The NFC Forum defines the NFC specifications that the phone in a guest's pocket implements: nfc-forum.org.

08. Where Kaway fits

Kaway manufactures hotel key cards in-house at the plant in Dongguan, China. Encoding is done at the plant. Every chip is read-tested individually before shipping (100%, not sampling).

Minimum order is 500 units. Standard production is 12 calendar days for PVC and wooden cards. Quote requests are answered the same working day. Wooden cards are produced at an FSC certified facility (FSC-C195226). Send the lock model, the quantity and the delivery date required to get a written compatibility confirmation and a quote.

09. Frequently asked questions

Will a new card work with existing locks?

It will when the chip is specified against the lock model you run, and confirmed in writing before production. Encoding depends on the chip and on the system's technical requirements, keys and authorisation. The body material has nothing to do with it.

How long does a hotel key card last?

A well laminated PVC card survives ordinary guest use for years. What ends its life is usually loss rather than failure, which is why a recovery box at the desk saves more money than any change of material.

Can we keep the existing artwork and change only the material?

Yes, with a proof, because the same artwork reads differently on grain than on white PVC. Pale inks and large flat colour areas in particular behave differently on wood.

Do we need different cards for guests and for staff?

Not necessarily different credentials, but often different bodies. The same chip in a fob or a wristband survives daily staff use far better than a card does.

What is the minimum order, and why is there one?

500 units. Below that the setup for printing, lamination and die cutting costs more than the cards do, which is a fact of the process rather than a commercial policy.

How far ahead should we order a reprint?

Standard production is 12 calendar days for PVC and wooden cards, plus freight. Ordering when stock is low rather than when it is out is the difference between a standard run and an expensive one. What actually sets the date a delivery arrives is covered separately.

Are the chips checked before the cards ship?

Every chip is read-tested individually before shipping (100%, not sampling). That is a read test of the chip rather than a certification of how long the card will last, and it is the check that stops a dead credential reaching a guest room on a busy arrival day.