Preform and Container Wall Thickness Measurement Log

Inspection log for recording wall thickness at defined measurement points on molded preforms or containers to verify even material distribution, dimensional consistency, and drop-performance readiness.

Inspection Details

• Inspection date and time recorded
• Product type identified
• Lot, batch, or run number recorded
• Measurement standard or SOP referenced
  Enter the internal specification, drawing number, or SOP used for this inspection.
• Inspector name and signature completed

Sample and Setup Verification

• Sample count matches inspection plan
• Measurement tool identified and verified
  Record the caliper, ultrasonic gauge, micrometer, or other approved instrument used.
• Measurement tool within calibration date
• Parts conditioned to inspection temperature
  Confirm parts were stabilized per SOP before measurement to reduce thermal variation.
• Defined measurement points available and understood
  Confirm the inspector has the correct measurement map for neck, shoulder, body, base, or other defined points.

Wall Thickness Measurements

• Neck or finish thickness within tolerance
  Record the measured thickness at the neck or finish measurement point.
• Shoulder thickness within tolerance
  Record the measured thickness at the shoulder measurement point.
• Body thickness within tolerance
  Record the measured thickness at the body or sidewall measurement point.
• Base or heel thickness within tolerance
  Record the measured thickness at the base or heel measurement point.
• Minimum wall thickness meets specification
  Enter the thinnest measured point from the sample set and compare it to the minimum acceptable thickness.

Material Distribution and Defect Review

• Wall thickness variation is within allowable range
  Confirm thickness variation across defined points does not exceed the product specification or control limit.
• Thin spots, sink marks, or localized thinning observed
  Mark Yes only if a defect is present. Any localized thinning is a non-conformance requiring review.
• Flash, warpage, or deformation affecting measurement
  Identify any condition that could distort the reading or indicate molding instability.
• Surface damage or contamination affecting inspection
  Note scratches, contamination, or handling damage that may affect measurement accuracy or part acceptability.

Disposition and Closeout

• Inspection result
• Corrective action or disposition documented
  Record rework, segregation, engineering review, or other disposition if any measurement is out of tolerance.
• Supervisor or quality reviewer approval