Understanding the Concept:
Tablet manufacturing defects can arise from mechanical issues with the tablet press, tool wear, or formulation imbalances. Identifying the root cause is critical for troubleshooting during industrial processing.
Analysis of Defects and Causes:
• Sticking: Occurs when tablet formulation material adheres to the die wall or punch faces. A primary formulation-related cause is excessive moisture in the granules resulting from improper drying. Residual moisture increases capillary adhesion forces, causing the material to stick to the metal tooling.
• Capping and Lamination: Characterized by the partial or complete separation of the top or bottom crowns (capping) or the splitting of a tablet into distinct layers (lamination). These defects are typically caused by air entrapment, excessive fines (not a low content of fines), or insufficient binder (too much binder usually prevents capping).
• Picking: A specific form of sticking where material adheres to engraving or lettering on the punch faces. It is caused by inadequate lubrication or wet granules, whereas excessive lubricant typically leads to soft tablets or prolonged disintegration times.
Thus, option (D) correctly pairs a tablet defect with its formulation-related cause.