What every label needs
| Field | Why |
|---|---|
| Brand name | Who stands behind the vial |
| Compound name | Exactly as it appears on the lab report |
| Amount per vial | In mg, matching the report's quantity line |
| Batch or lot number | The link between this vial, your records and its lab report |
| Storage line | For example "Store cool, dry and away from light", as your supplier specifies |
| Research-use-only statement | "For research use only. Not for human consumption." |
| QR code | Opens the public lab report for this batch |
If you have room, add a website address and a made or packed date. If you do not have room, the batch number and QR code matter more than anything decorative.
What never goes on a label
- Any amount to take, schedule or preparation instructions for use.
- Any description of what the compound does in a person or animal.
- Images of people or bodies.
- Words that position the product as something to consume. Run your label text through the wording checker before you print a batch.
A free label layout
This layout fits a narrow vial label and reads left to right. Adapt the sizes to your vial, and keep the order.
- Left third: the QR code, with a clear margin around it on every side.
- Top line, largest text: the compound name.
- Second line: the amount per vial, then your brand name.
- Third line: "Batch" followed by the batch number, in a clear, unambiguous font.
- Bottom line, smallest text: the storage line and "For research use only. Not for human consumption."
Before a full print run, measure the vial's height and circumference, print one label on plain paper, wrap it around a vial and check that nothing important sits on the curve where it cannot be read or scanned.
Choosing label stock and a printer
- Direct thermal labels need no ink or ribbon, which makes them cheap and simple, but they darken with heat and fade with light and time.
- Thermal transfer labels print through a ribbon and last much longer. Worth it for stock that sits for months.
- Synthetic label material holds up to cold storage, condensation and wiping better than paper.
- A small desktop thermal label printer is enough for most sellers. Check it supports the label width you want before you buy stock.
Printer settings that keep labels legible
- Set the label size in the printer driver to the exact size of your stock, so nothing is scaled.
- Print at the printer's native resolution. A file designed at another resolution gets resampled and small text blurs.
- Use solid black for text and the QR code, never grey. Thermal printers render grey as a speckled pattern.
- Raise the darkness setting until the finest text is crisp, and slow the print speed if thin lines break up.
- Scan the QR code from a phone at arm's length on a finished label before printing the rest of the batch.
Linking the label to the lab report
The QR code should open a page for that specific batch, not a general product page. A buyer scanning the vial should see the batch number they are holding, the lab, the test date and the key figures from the report, and whether the batch is currently released. That single scan answers most of the questions buyers would otherwise email you. How buyers verify a peptide COA covers what they look for.
Doing it in Purity
Every batch in Purity has a printable label with a QR code that opens its public report page, which needs no login. Open the product, click Label next to the batch and print; see print a batch label. If the batch is not released yet, the page tells the scanner so, and the same research-use-only line appears on every report page. See it on the demo.
Common questions
- What should a research peptide label say?
- The brand, the compound name, the amount per vial, the batch number, a storage line, "For research use only. Not for human consumption." and ideally a QR code to the batch's lab report. Nothing about how to use it.
- What kind of printer do peptide sellers use for labels?
- Most use a small desktop thermal label printer. Direct thermal is simplest; thermal transfer with a ribbon lasts longer, which matters for stock that sits for months.
- Why do my labels come out faint or speckled?
- Usually grey text or a design at the wrong resolution. Use solid black, print at the printer's native resolution with the exact label size set, and raise the darkness setting.