How to control the color difference in packaging printing?
答：
Visual color matching under standard light source (D65 light source).
KBT-D65A Double Light Source Viewer_Film & food Packaging Testers_Link Testing Instruments co. ,Ltd
Instrument measurement of ΔE (CIELAB):
Internal control requirements: ΔE < 1.5 (for precise packaging), and for general packaging, ΔE < 2.0 - 3.0.
Control Point:
The printing pressure and the parameters of the screen roller are fixed.
The pre-press proofing was approved by the client.
Standard sample sheets are retained for each batch.
What are the common quality issues in blister packaging of medicines?
答：
1. The adhesion between aluminum foil and PVC is not strong:
Insufficient sealing temperature or pressure; Fluctuation in the thickness of the aluminum foil coating
Common detection equipment:
Heat Seal Tester LTH-H3_Film & food Packaging Testers_Link Testing Instruments co. ,Ltd
2. Bubble wrap rupture
Thickening due to excessively high molding temperature; Rough mold with burrs
Common detection equipment:
Leak Tester LTY-01_Container Packaging Testers_Link Testing Instruments co. ,Ltd
3. Aluminum foil pinholes
Excessive pinholes in the raw aluminum foil (refer to GB/T 22638)
Common detection equipment:
Aluminum Foil Pinhole Tester LTZK-02_instruments_Link Testing Instruments co. ,Ltd
4. Poor tearability
Excessive heat sealing strength; Inappropriate tear design
Common detection equipment:
Elmendorf Tearing Tester LTLD-1000Z_Film & food Packaging Testers_Link Testing Instruments co. ,Ltd
In the quality control of packaging, which documents are essential?
答：
Standard Operating Procedure: Testing methods, sampling plan (e.g. AQL 0.65–1.5).
Inspection records: incoming material inspection reports, process inspection reports, and finished product inspection reports.
Equipment management: Calibration certificates for heat sealing machines, tensile testers, thickness gauges, etc.
Traceback record: Batch number, supplier information, exception handling form.
Customer requirements: drawings, color charts, test protocols.
Sealing becomes brittle and breaks easily
答：
Reason: Excessive sealing temperature, excessive pressure or prolonged time
The edge of the upper sealing device is sharp or the polytetrafluoroethylene cloth is damaged.
The bottom silicone rubber is too hard.
The adhesive penetrates into the interior of the film, reducing its toughness.
Solution: Based on the characteristics of the inner sealing layer material, select the appropriate heat sealing parameters.
Check and improve the surface condition of the heat sealing knife, and ensure that the polytetrafluoroethylene cloth is intact.
Select a silicon rubber pad of the appropriate hardness
The common test equipment:
Heat Seal Tester LTH-H3_Film & food Packaging Testers_Link Testing Instruments co. ,Ltd
Automatic Tensile Tester XLW-500N_Adhesive Testers_Link Testing Instruments co. ,Ltd
Heat sealing quality testing methods and standards
答：
ASTM F88/F88M Stretch tester for measuring peel strength at the heat seal General flexible packaging
GB/T 8808 Heat seal tester to simulate actual process parameters Composite film
YY/T 1432-2016 To determine heat seal parameters by sealing strength of the sample heat seal Medical device flexible packaging
The common test equipment:
Automatic Tensile Tester XLW-500N_Adhesive Testers_Link Testing Instruments co. ,Ltd
Heat Seal Tester LTH-H3_Film & food Packaging Testers_Link Testing Instruments co. ,Ltd
