Private Label & OEM2 min read

Coating Label Colour Proofs: A Screen Approval Is Not a Printed-Colour Approval

A colour approved on a monitor does not fully define the appearance of a printed coating label. The label material, inks, finish and bottle background belong in the approval process.

Updated · NANOLAB Knowledge

The key distinction

Decide what the physical reference is and who approves it. A digital mockup can communicate layout, while a printed proof answers different questions about the chosen production construction. Keep those approval roles separate so a layout sign-off is not later treated as acceptance of every colour and finish detail.

Practical checks

  1. Identify the printer's proof type and what it represents.
  2. Review the intended substrate, finish and bottle combination.
  3. Retain the approved physical reference with the artwork and production revision.

Example

Illustrative example: a dark brand colour looks acceptable on screen but changes noticeably on the selected label stock. The designer's PDF approval did not necessarily assess that material interaction. A production-relevant proof gives the brand and printer a shared appearance reference before the main run.

Scope and limits

Do not promise exact colour matching from an uncalibrated photograph or another printing process. This guide does not establish a numerical colour tolerance. Agree the reference, viewing conditions and acceptance method with the printer so that later reviews compare the same intended result.

Related guidance

Discuss bulk supply and private-label requirements with NANOLAB. Use the current product documentation for formulation-specific instructions.

Private Label & OEM2 min read

Coating Bottle Barcodes: A Successful Scan Is Not Full Verification

Reading a barcode once with a convenient scanner does not establish that the printed symbol meets every quality requirement for its intended supply chain. Include appropriate verification in the packaging approval process.