National Bobbin Company
Nirmal Tubes & Containers Pvt. Ltd.
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 Quality Control Devision
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Bharti Pulp & Paper Products Pvt. Ltd.
Nirmal Sales Corporation
Nirmal Exports Inc.
Nirmal Poly Plast & Packaging Pvt. Ltd.
Quality Control Devision
Since NTC's establishment, the company has been putting huge emphasis of Quality control test done at each stage of production, to ensure that the final output is as per the customer specifications.

The quality control system, which is a part of R&D department, carries out quality control test in effect for the control of raw materials purchased by NTC.This system is also in effect for inspecting and testing material during processing.

This system provides assurance that the material procured by NTC continues to meet the physical, chemical, functional, visual, and dimensional requirements needed for the customer.
Listed below are the specific tests on raw materials and finished products done at the quality control department at NTC.
TEST PERFORMED ON RAW MATERIAL...
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Basic weight of paperboard

Tensile strength

Tearing resistance

(calper) Thickness of paper

Air resistance

COBB test (water absorptiveness)

Ring crush (compression resistance)

Stiffness of paperboard

Bursting strength

TEST PERFORMED ON FINISHED TUBES AND CORES...
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Measuring length or height

Delamination of adhesive bonds due to water immersion & high humidity

Torque strength

End-supported beam strength

Internal bursting

Measuring moisture content

Axial (end to end) compression

Measuring inside & outside diameter

Measuring wall thickness

Measuring spindle fit

Side-to-side crush

INSPECTION CHECKS AND/OR TESTING OF IN PROCESS PRODUCTS...
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Mandrel check

Specification sheet check

Square cut check (winders)

Paper board check

Adhesive check

Gap width

Overlapped top and inside ply

Glue seepage (outside)

Wall thickness check

Length check

Glue bond or lamination check