Pillar I · Round Lab Batch Code Checker
Round Lab Batch Code Checker — lot number & freshness guide
Lot Stamp (Date Not Encoded) · [Lot number, 3–12 letters or digits][Production date not publicly encoded] · checked privately in your browser.
Lot Stamp (Date Not Encoded) · Houses without a published date code
[Lot number, 3–12 letters or digits][Production date not publicly encoded] · e.g. L24105
Where Round Lab stamps its code: outer box base crimp + flacon base
Embossed on the top crimp seal of Birch Juice Moisturizing Sunscreen SPF 50+ PA++++ and 1025 Dokdo Cleanser tubes, or ink-jet printed on the bottom base of 1025 Dokdo Toner bottles.
- Read the code off the box base crimp in raking light — authentic embossing has uniform depth.
- Read the flacon base or label code and enter it above — the two must match character for character.
- Check for scraped, re-embossed or stickered-over crimps: a classic way to hide aged gray-market stock.
Printable guideWhere to Find Your Code (Tap to Zoom) ↓ Download WebP
Parent Conglomerate Pattern · Houses without a published date code
How Round Lab Codes Are Structured
- Pattern
- Lot Stamp (Date Not Encoded)
- Group
- Houses without a published date code
- Structure
- [Lot number, 3–12 letters or digits][Production date not publicly encoded]
- Length
- 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 or 11 or 12 characters
- Stamped On
- outer box base crimp · flacon base
- Confidence
- Reference only — the code identifies the production lot, but no production date can be read from it. Use the printed EXP / MFD date or the PAO symbol, or ask the brand to date the lot number.
- Reported Notes
- Round Lab (Seorin Company Co., Ltd.) prints a 4-to-7-character alphanumeric batch code alongside an explicit Korean YYYY.MM.DD manufacture (제조) and expiration (사용기한 / 까지) date on every tube crimp, bottle base, and outer carton. Unopened Birch Juice Moisturizing Sunscreens and 1025 Dokdo toners/cleansers remain stable for 36 months from manufacture; follow the 12M PAO symbol once opened. (reported, not verified by Beauty.net)
- Where to Look
- Embossed on the top crimp seal of Birch Juice Moisturizing Sunscreen SPF 50+ PA++++ and 1025 Dokdo Cleanser tubes, or ink-jet printed on the bottom base of 1025 Dokdo Toner bottles.
Worked Decode · L24105 → Not date-encoded
| Sample Code | Production Date | Verdict (as of November 2026) |
|---|---|---|
| L24105 | Not date-encoded | Lot Recorded — Check the Printed Date |
| 3145A | Not date-encoded | Lot Recorded — Check the Printed Date |
| B2209A | Not date-encoded | Lot Recorded — Check the Printed Date |
Round Lab has not published how its lot code encodes the production date, so no date is estimated. Read the printed EXP / MFD date or the PAO (open-jar) symbol, or give the lot number to the brand's customer service.
Beauty.net does not estimate dates for houses without a published code structure. Reported notes: batch-code reference, not verified by Beauty.net. A valid format never proves authenticity.
Searchable in the Decoder
Popular Round Lab Products
- roundlab
- round lab birch juice moisturizing sunscreen
- round lab 1025 dokdo toner
- round lab 1025 dokdo cleanser
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Section V · Formulation Audit
Audited Formulations From Round Lab
-
1025 Dokdo Toner →
Barrier / Peptide / Hydrator · Hydrating & Mild Protease Toner
Skincare is best used within about 36 months of production and 6–12 months of opening.
Field Notes
Frequently Asked Questions
Can I decode a Round Lab batch code?
Round Lab has not published how its lot code encodes the production date, so Beauty.net records the lot number and checks its format but does not estimate a date. Reported notes (from the batch-code reference cited below, not verified by Beauty.net): Round Lab (Seorin Company Co., Ltd.) prints a 4-to-7-character alphanumeric batch code alongside an explicit Korean YYYY.MM.DD manufacture (제조) and expiration (사용기한 / 까지) date on every tube crimp, bottle base, and outer carton. Unopened Birch Juice Moisturizing Sunscreens and 1025 Dokdo toners/cleansers remain stable for 36 months from manufacture; follow the 12M PAO symbol once opened. To check freshness, read the printed EXP or MFD date or the PAO (open-jar) symbol, or give the lot number to Round Lab customer service. A correctly formatted code never proves authenticity.
Where is the batch code stamped on a Round Lab box and bottle?
Embossed on the top crimp seal of Birch Juice Moisturizing Sunscreen SPF 50+ PA++++ and 1025 Dokdo Cleanser tubes, or ink-jet printed on the bottom base of 1025 Dokdo Toner bottles. Look on the outer box base crimp and the flacon base. The code on the box and the code on the flacon must match character for character; a scraped, re-embossed or stickered-over box crimp is a classic sign of aged gray-market stock.
How long does Round Lab last and where can I buy fresh-batch authentic products in Singapore?
Unopened, Round Lab skincare is a fresh batch for 24 months from production and should be used within about 36 months, as vitamin C, retinoids and peptides degrade with time. In Singapore, buy from Round Lab authorised counters and the brand's official online store, and check that the printed EXP / MFD date is recent before you pay.