Tests perfomed on raw materials

• Weight of paperboard 
• Tensile Strength
• Tearing Resistance
• Thickness (Caliper)
• Stiffness of Paperboard
• Bursting Strength
• Compression Resistance
• Water absorptiveness

Testing done on finished tubes and cores

• Measuring Outside Diameter
• Measuring Wall Thickness
• Measuring inside diameter
• Measuring lengths or heights
• Measuring moisture content
• Measuring compression
• Delamination of Adhesive Bonds due to water immersion
• Defamation of Adhesive Bonds due to high humidity

Inspection Checks and /or Testing of in Process Products

• Mandrel check
  
• Specification sheet check
• Overlapped Top Ply
• Overlapped inside Ply
• Glue seepage (outside)
• Length Check (winders)
• Wall Thickness Check
• Inside Ply
• Sawcut (winders)
• Kecutter Burrs
• Trim Check (recutters)
• Screwing (recutters)
• Exterior Marks (general Appearance)
• Paperboard Check
• Adhesive Check
• Gap width
• Overlapped inner plies or body plies Glue seepage (inside) Plice Check
• Outside diameter check Glue bond or lamination check Excessive beveling (recutters)
• Poor separation of cuts (recutters)