美容コラム

How to read an Estée Lauder batch code: where the 3-character code is printed, whether the same scheme covers the other brands in the group (MAC / Clinique / La Mer), and how to confirm the exact production date and shelf life.

Where is the batch code printed on La Mer products? How to check the production date of your Crème de la Mer or Treatment Lotion? Batch code location, shelf life reference, and common mistakes explained.

Where is the batch code printed on YSL (Yves Saint Laurent) products? How to check production dates for lipsticks, fragrances and foundations? Batch code location, shelf life reference, and common mistakes explained.

Where is the batch code printed on CPB (Clé de Peau Beauté) products? How to check production dates for the famous primer and foundations? Batch code location, shelf life reference, and common mistakes explained.

Where is the batch code printed on Shiseido products? How to check production dates for Ultimune serum and sunscreen? Batch code location, shelf life reference, and common mistakes explained.

How to read a Lancôme batch code: where the 5-6 character code is printed on bottles like Advanced Génifique and Tonique Confort, whether the same scheme covers other L'Oréal Group brands (YSL / Kiehl's / Armani), and how to confirm the exact production date and shelf life.

How to read a Clarins batch code: where the 7-digit numeric code is printed on bottles like Double Serum, and how to confirm the exact production date and shelf life.

How to read a SK-II batch code: where the 10-digit code is printed on bottles like Facial Treatment Essence (the 'Miracle Water'), why it resists manual decoding, and how to confirm the exact production date and shelf life.

化粧品のバッチコード（製造番号）はどこに印字されている？瓶底やチューブの口、外箱の底での探し方、ブランドごとに異なるコード規則や暗号化ブランドの落とし穴、製造日と使用期限を正確に調べる方法まで解説します。

Understand the difference between the unopened shelf life of cosmetics and the period after opening (PAO). Includes a shelf life reference table by product category to help you manage your cosmetics scientifically.

A roundup of batch code formats from 10+ major cosmetics groups including Estée Lauder, Lancôme, L'Oréal, Shiseido, LVMH and Chanel, plus how to confirm the production date of the bottle you are holding.

Barcodes, batch codes, and filing numbers are three different things: a barcode identifies the product, a batch code maps to the production batch, and a filing number is just a regulatory ID. This article explains the differences so you can run the right lookup.

化粧品を開封後どのくらい使えますか？PAO（開封後使用期限）マークの数字の意味や、マスカラ・日焼け止め・美容液などカテゴリー別の目安、変質のサイン、使用期限を延ばす正しい保存方法まで、この記事でまとめて解説します。

Checking a batch code isn't just about the date. Spot fakes, prevent allergic reactions, verify overseas purchases, and build trust in secondhand trades — this little code matters more than you think. Learn the 5 core reasons.

Toner, lotion, serum, face cream, eye cream, sunscreen, sheet masks... how long does each skincare category last after opening? This article provides a complete skincare shelf life reference chart.

Learn to judge cosmetic authenticity from four angles: batch code, packaging details, product texture, and purchase channel. Includes a directory of official brand verification channels, so you can buy and use with confidence.

Duty-free cosmetics come without a local-language label — how do you find the production date? This article explains batch code reading for duty-free channels such as Sunrise Duty Free, CDF, Korea's Lotte/Shilla, and Japan's DFS.

Can you actually use cosmetics after they expire? This article analyzes the risk level of expired products by category, teaches you how to tell whether a product has gone bad, and covers sensible ways to dispose of expired cosmetics.

How do you avoid pitfalls when buying cosmetics from overseas? Learn to spot fakes, check production dates, and verify authenticity. Batch code lookup for 2,500+ brands including Estée Lauder, Lancôme, and MAC.

化粧品のロット番号（バッチコード）はどこで調べられる？CheckFresh・CheckCosmetic・BeautyChecker などの外部ツールと、消費者庁・国民生活センターなど日本の公式窓口をまとめて比較しました。

What batch codes usually look like across the six biggest beauty groups — L'Oréal, Estée Lauder, LVMH, Shiseido, Amorepacific and P&G — whether brands within a group share one scheme, and how to confirm the exact production date.