Coating Line Substrate Changeover Quality Verification

Inspection template for verifying cleaning, treat-level recheck, and first-piece approval when switching substrates on a coating line to prevent additive transfer, contamination, and adhesion defects.

Changeover Authorization and Line Identification

• Current substrate, next substrate, and job order match the production traveler
• Line, coating system, and product identifiers are posted and legible at point of use
• Changeover start time recorded
• Previous substrate removed from the line and segregated to prevent mix-up
• Required PPE and chemical handling controls are in place for the cleaning process

Cleaning, Purge, and Contamination Control

• Coating heads, rollers, pumps, hoses, and transfer points are visibly clean and free of residue
• Cleaning method completed per SOP for the previous substrate and coating chemistry
• Purge material or flush cycle completed and documented
• Waste purge, wipes, and removed residue are contained and disposed of per procedure
• No visible contamination sources remain in the coating path, including dust, fibers, oil, or loose debris
• Environmental conditions in the coating area are within site limits for the new substrate
  Record the applicable environmental reading used by the site, such as relative humidity or another controlled parameter.

Substrate Preparation and Treat-Level Recheck

• Incoming substrate lot, roll, or batch identification matches the approved changeover record
• Substrate surface is free of visible damage, oil, moisture, or release contamination
• Treat level or surface energy recheck completed on the first material from the new substrate
• Measured treat level or surface energy
  Enter the measured value and compare it to the site specification for the new substrate.
• Measured treat level meets the minimum specification for the new substrate

Startup Conditions and First-Piece Approval

• Line speed, temperature, cure settings, and coating application settings are set to the approved startup recipe
• First piece or first sample from the new substrate is identified and retained for review
• First-piece appearance is acceptable with no streaks, fisheyes, pinholes, skips, or contamination defects
• Adhesion or bond performance check completed on the first piece when required by SOP
• First-piece approval status

Release, Documentation, and Corrective Action

• Any non-conformance, deficiency, or containment action documented
• Affected material isolated pending disposition if a defect or contamination issue was found
• Line released to production after all critical items passed
• Inspector signature