Who makes I:Proof?
It is an eye-makeup line from Japan's BCL Company.
Check I:Proof Cosmetic Batch Code
I:Proof is a Japanese eye-makeup line from BCL Company. The range is built around long-wear performance and includes separate-finish mascara, liquid and pencil eyeliners and eyebrow products, often sold in slim cartons or card-backed packs.
I:Proof FAQ
Is Jet Black a lot code?
No. It is a colour name.
Where should I look on mascara?
Inspect the tube base and both flaps of the slim carton.
I:Proof production marks by eye-makeup format
Before you rely on the decoded date
- Inspect mascara and liquid-liner tube bases, pencil barrels and caps, the rear seam of card packs and the top or bottom flap of slim cartons. A code on disposable outer packaging can be absent from the applicator itself.
- Long, Volume, Jet Black, Black Brown and the brand's performance-test wording distinguish formula, finish or shade. They are product descriptors, not production codes.
Common lookup mistakes
- Record the Japanese アイプルーフ name and exact mascara or liner variant with the short stamp before throwing away the card or carton.
- Do not confuse a shade name, JAN barcode or BCL contact number with the lot; compare repeated text on the applicator and outer pack.
What to check next for I:Proof
For I:Proof, combine the decoded date with product type, PAO, storage, and seller context before deciding whether to open, keep, replace, or buy.
Understand what the checker can prove
See how Lot Date estimates production timing, where precision drops, and when official packaging should override the result.
Read methodologyMake sure you are reading the right string
Use a locating guide before retrying if the printed code is faint, split across the box and bottle, or easy to confuse with barcode data.
Open guide: How to Find Cosmetic Batch Codes and Lot Numbers on PackagingTurn the decoded date into a safer use decision
Use an expiry guide when production timing alone is not enough to decide whether to open, keep, or replace the product.
Open guide: How to Check Cosmetic Expiry Date from Batch Code, PAO, and PackagingCheck seller, storage, and authenticity signals
Use a risk guide when the item comes from marketplace stock, duty-free inventory, resale, or a seller you do not fully trust.
Open guide: Does a Batch Code Prove Authenticity? Can a Cosmetic Code Be Fake?I:Proof lot, expiry, and packaging checks
Continue with the check that matches the product: find the lot number, review expiry or PAO, separate the batch code from the barcode, or assess sunscreen and fragrance more carefully.
Cosmetic Batch Code Lookup: Find the Right Code
Find the cosmetic batch code on your box, bottle or tube. Separate the lot from barcodes and shade numbers, then choose the brand to check production.
Cosmetic Batch Code Lookup: Find the Right CodeCosmetic Lot Number Search | Find a Lot Code by Brand
Find and copy the cosmetic lot number from your tube, jar or box. Keep kit components separate, then select the brand in Lot Date to check production.
Cosmetic Lot Number Search | Find a Lot Code by BrandCosmetic Expiration & Expiry Date Checker
Read a cosmetic expiration date or PAO symbol. Compare sunscreen, jelly and opened skincare labels, then check the batch code for production age.
Cosmetic Expiration & Expiry Date CheckerCosmetic Expiry Date from Batch Number
Enter a cosmetic batch number with its brand to check production age. Follow the result with product-specific expiry, unopened-life and PAO instructions.
Cosmetic Expiry Date from Batch NumberCompare related brands
Read next for this brand
- What to Do When the Batch Code Result Conflicts with Your Purchase Date
- How to Check Cosmetic Expiry Date from Batch Code, PAO, and Packaging
- How to Find Cosmetic Batch Codes and Lot Numbers on Packaging
- What If There Is No Batch Code on the Cosmetic Package?
- Cosmetic Production Date Meaning: MFG, Expiry & PAO
- Why a Cosmetic Batch Code Is Not Found — What to Check Next
- Why Your Batch Code Result Shows Only Year and Month
- Why the Box Code and Bottle Code Can Be Different
Track opened products in the app
Use the app to save results, manage opened dates, and avoid losing track of older backups.