UV Coating Cure Verification Log - MEK Double Rub

This log verifies whether a UV or electron-beam coating has reached the job-specific cure baseline using MEK double-rub results, tack checks, and adhesion observations. It is meant to capture a pass/fail decision tied to the actual work order, substrate, coating lot, and test conditions. The output is a documented cure verification record, not a full laboratory report.

Use it when your process calls for a practical shop-floor check of cure before moving product to the next step, especially after UV or EB coating. It fits production release, first-article checks, and in-process verification where the baseline is defined by your SOP or customer spec. If you need formal qualification, long-term durability testing, or a full adhesion study, this template is not enough on its own.

A trained quality inspector, line lead, or process technician should complete it, following the site SOP and any customer-specific test method. The person running the test should understand solvent handling, sample selection, and how to recognize softening, smear, transfer, or coating lift. If your procedure requires a witness or approval step, this log can capture that handoff.

Use it at the frequency defined by your procedure, such as each job, each lot, first-off approval, or after process changes. Many shops also use it when curing parameters change, after maintenance, or when a defect trend suggests incomplete cure. The key is consistency: the same job should be tested the same way every time unless the procedure says otherwise.

It supports quality-control documentation practices commonly used under ISO 9001-style systems and can help demonstrate controlled verification of a special process. It may also support internal EHS controls for solvent handling and exposure awareness, depending on how MEK is used at your site. The template does not replace your SOP, customer specification, or any required lab method.

Common mistakes include not identifying the exact sample or test area, using inconsistent rub direction or pressure, and failing to record the ambient conditions when the procedure requires them. Another frequent issue is treating a visual pass as enough even when tackiness, smear, or color transfer is present. The log works best when the acceptance baseline is defined before the test starts.

Yes. The template is designed to hold your job-specific baseline, so you can tailor the rub count, acceptable appearance, and disposition rules to your coating system and customer requirements. If your process uses different solvent, stroke count, or cure indicators, update the fields and instructions so the record matches your actual method.

This log can be used as a standalone paper form or adapted into a digital workflow with required fields, photo attachments, and approval routing. It pairs well with lot tracking, non-conformance records, corrective action logs, and release-to-production checkpoints. If you integrate it with MES or QMS tools, keep the job ID, sample ID, and disposition fields consistent across systems.

If the coating softens early, shows tack, or transfers color or smear, record the non-conformance and stop release until the cause is reviewed. Typical follow-up actions include checking cure settings, lamp output, conveyor speed, coating thickness, substrate compatibility, and contamination. The template includes a disposition area so you can document rework, hold, scrap, or retest decisions.