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Q. Flash Q. Sink Marks Q. Warpage Q. Weld Lines
Q. Short Shots Q. Silver Streak Q. Flow Mark Q. Jetting Mark
Q. Discoloration Q. Surface Blisters Q. Brittleness  
Q. Poor Surface Finish Q. Delamination Q. Burn Marks  

 
 
    Q. Sink Marks
    Machine/Pressure
    Related Causes		     Mold Related Causes   Resin Related Causes
  1. Increase Injection Pressure
  2. Increase Injection Hold Time
  3. Decrease Melt Temperature
  4. Increase Injection Time
  5. Increase Cooling Time
  6. Decrease Injection Speed
  1. Increase Runner, Gate or Sprue Size
  1. Resin Overdried