Where is the batch code on a perfume bottle or a cosmetic product?

A batch code is a short combination of 3 to 8 letters and digits. It is laser-etched under the glass, ink-jetted on the base, or embossed under the box flap. It is not the 13-digit barcode: the EAN identifies the product on a shelf, the batch code identifies when it was made.

How do I check how old a cosmetic is from its batch code?

Find the 3 to 8 character code under the bottle or under the box flap, then type or scan it into CosmeScan. The tool calculates the manufacturing month, the age of the formula and the remaining shelf life, across 4,155 brands. The decoding runs in your browser, no photo is sent to a server.

How do I read a Dior, Chanel, Guerlain or L'Oréal batch code?

At LVMH (Dior, Guerlain, Givenchy) the code is 4 characters, for example 4B01. The first one is the last digit of the year, the second is the month with the letter I skipped (A is January, B is February). At L'Oréal (Lancôme, YSL, CeraVe) the third letter of a 6 character code carries the year: 38Z401, with X for 2024, Y for 2025 and Z for 2026. At Estée Lauder (MAC, Tom Ford) it is the third digit of a 3 character code, for example AB5. Every house has its own rule, and some do not decode publicly.

How can I tell if a perfume has gone off?

A perfume does not turn all at once like food. Its top notes oxidise with air, light and heat. CosmeScan sorts freshness into three states: fresh under 24 months, watch between 24 and 36 months, past it beyond 36 months. Three years after opening, citrus fades and the alcohol can turn. The little jar symbol on the label gives the exact figure for your product.

What is the ten-year batch code cycle?

The big houses reuse their sequences every ten years: 9P01 can mean February 2019 or February 2009. The vintage mode in CosmeScan switches between a current bottle and a collector from the 2010s. When two dates remain possible, CosmeScan shows the result as ambiguous instead of picking one at random.

How do I reassure a buyer about the freshness of a perfume I am selling?

CosmeScan generates a 1080 × 1080 dating card with the batch code, the manufacturing date calculated from that code and a verification link. The link takes the buyer back to the brand page and to any recall on record. The card is built for a Vinted, eBay, Leboncoin, Vestiaire or Mercari listing. It documents the dating, it is not an expert appraisal and it does not establish authenticity.

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Cartier 香水真假辨别与在线AI鉴真 (Legit Check) — CosmeScan

免费在线核验 Cartier 香水真伪。5大关键部位AI特征检测：喷嘴雾化孔、金属压圈、瓶底厚度与批号喷码（4BA1 ou 23456 (4-5 car.)）。支持生成专业PDF报告及二手交易维权申诉函。

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Take photos of your bottle across the 5 critical angles (front glass, macro nozzle, bottom etching, cap, box). Our AI model immediately verifies manufacturing tolerances and industrial finishes.

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5步视觉鉴真拍摄规范指南 — Cartier

SLOT 1 • CRITIQUE 第1张 — 瓶身正立面与玻璃通透度

正面拍摄完整 Cartier 瓶身，检查玻璃纯净度、底部玻璃厚度对称性以及吸管居中与通透情况。

SLOT 2 • CRITIQUE 第2张 — 喷嘴微距与金属压圈咬合

取下瓶盖微距拍摄喷头雾化孔与金属卡圈，检测是否为工业级无褶皱高压包边工艺。

SLOT 3 • CRITIQUE 第3张 — 瓶底厚底与生产批号喷码

清晰对焦瓶身底部，校验激光蚀刻或高清丝网印刷的生产批次序列号（4BA1 ou 23456 (4-5 car.)）。

SLOT 4 • COMPLÉMENT 第4张 — 瓶盖内腔结构与磁吸手感

微距拍摄瓶盖内部内胆，检查磁吸对齐方向、配重质感及模具分型线光滑度。

SLOT 5 • COMPLÉMENT 第5张 — 外包装底面与批号双向核对

拍摄 Cartier 外盒底面条形码与批号区域，严格比对纸盒钢印批号与瓶底喷码的一致性。

常见问题解答 — 假货鉴别与平台维权 Cartier

如何辨别真假 Cartier 香水？

鉴别正品与假冒 Cartier 香水应重点比对4项工业级制造特征：高压机械包边的雾化喷头压圈（无任何手工钳痕或褶皱）、底部厚实通透且无气泡的玻璃模具工艺、置入香水后近乎隐形的通透导管，以及瓶底清晰锐利的激光批号蚀刻（4BA1 ou 23456 (4-5 car.)）。

在二手交易平台买到假香水可以全额退款吗？

可以。收到假货切勿确认收货，应第一时间在平台发起“假冒品牌”售后维权。上传由 CosmeScan 出具的高清微距比对 PDF 鉴定报告及平台维权举证函，可有效锁定证据链，获得平台客服支持并执行极速全额退款。

生产批号（Batch Code）正确就能证明香水是正品吗？

不能，仅凭生产批号能够查询绝不足以证明正品。造假工场往往直接抄录专柜正品瓶身上的真实批号进行批量印刷。只有结合瓶身喷头工艺、金属压圈咬合度、玻璃纯净度与导管折射等多维视觉特征深度核验，方能彻底甄别真伪。

Need to calculate Cartier manufacturing date? Use our algorithmic batch code expiration and PAO calculator.

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