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Naiss Label | Quality Commitment & After-Sales Service Plan

Part 1: Quality Commitment Letter

Thank you for choosing Naiss Label as your trusted label printing partner.

To ensure our products meet international quality standards and customer requirements, we provide strict quality control, professional manufacturing processes, and reliable quality commitments.

1. Quality Management System Commitment

ISO Quality Certification

We strictly implement the ISO 9001:2015 Quality Management System and follow internationally recognized quality standards.

Our printing process complies with ISO 12647 standards to ensure accurate color reproduction, excellent registration precision, and stable printing performance.

Full Process Quality Control

We conduct comprehensive quality control throughout the entire production process:

  • Raw material inspection
  • Pre-press preparation
  • Printing process monitoring
  • Post-processing inspection
  • Finished product verification

Critical production stages are controlled by Quality Control Points (QCP) to ensure defective materials and products never enter the next process.

Product Traceability System

Every production batch has complete manufacturing records including:

  • Raw material batch numbers
  • Machine parameters
  • Quality inspection records
  • Production operator information

This ensures full traceability from raw materials to finished products.

2. Product Technical Quality Standards

Quality Item Standard Testing Method
Color Accuracy ΔE ≤ 2.0 (CIE Lab Color Difference Standard) X-Rite eXact Spectrophotometer
Printing Registration Accuracy ≤0.15mm Registration Inspection Equipment
Dot Gain Control ISO 12647-2 Standard Curve Densitometer / Spectrophotometer
Barcode Quality ANSI 3.0 / ISO 15416 Grade B or above Barcode Testing Equipment
Adhesion Strength 3M 600 Tape Test ≥ Grade 4 Cross-cut Test + Tape Peel Test
Scratch Resistance No visible scratches under 500g load Taber Abrasion Tester
Temperature Resistance -20℃ ~ +80℃ Constant Temperature & Humidity Test
Weather Resistance UV aging test ≥72 hours without fading QUV Accelerated Weathering Tester
Dimensional Accuracy ±0.3mm High Precision Image Measuring System
Die Cutting Accuracy Complete waste removal, no burrs, no tearing Visual Inspection + Microscope Sampling

3. Raw Material Quality Commitment

  • All face materials, adhesives, and backing papers are sourced from qualified suppliers complying with: RoHS, REACH, FDA requirements.
  • Adhesive performance including initial tack, holding power, and temperature resistance is tested according to ASTM standards.
  • Printing inks use environmentally friendly benzene-free and ketone-free inks complying with food contact material safety requirements.

4. Shipment Inspection Commitment

Every production batch is inspected according to AQL Sampling Standards (ANSI/ASQ Z1.4 / ISO 2859) .

Inspection Item Sampling Level AQL Value
Appearance Defects
(Dirt, scratches, color difference) 		Level II 1.0
Size / Die Cutting Deviation Level II 0.65
Functional Defects
(Adhesion / Waste Removal) 		S-3 0.4
Barcode Readability S-3 0.25

Each shipment is accompanied by:

  • COA (Certificate of Analysis)
  • Batch Quality Inspection Report

5. Non-Conforming Product Handling Commitment

Minor Defects

Replacement at a ratio of 1:1.1 based on defective quantity, or proportional compensation.

Serious Batch Defects

Full replacement or refund, including direct transportation costs caused by quality issues.

Emergency Replacement

Emergency production scheduling will be started within 10 hours to ensure fast replacement delivery.

Part 2: After-Sales Service Plan

1. Dedicated Overseas Customer Service Team

Role Responsibility Language Support
Account Manager Order communication, business coordination, and project follow-up Chinese / English
Quality Engineer Quality issue analysis, improvement actions, 8D report preparation Chinese / English
Technical Support Engineer Product application guidance, labeling process optimization Chinese / English
Logistics Coordinator Shipment tracking, customs assistance, delivery coordination Chinese / English

2. Response Time Commitment

P1 - Emergency

Mass functional defects affecting production.

Response: Within 2 Hours

Solution: Within 24 Hours

P2 - Serious

Batch quality issues requiring replacement.

Response: Within 4 Hours

Solution: Within 48 Hours

P3 - General

Individual appearance or dimensional issues.

Response: Within 8 Hours

Solution: Within 72 Hours

P4 - Inquiry

Product application, technical consultation.

Response: Within 12 Hours

Communication Channels:
Email / WhatsApp / WeChat / Video Conference

24/7 message support available. Immediate response during working hours.

3. Quality Issue Handling Process
(8D Closed-Loop Management)

D1 - Team Formation: Establish a dedicated improvement team after customer feedback.

D2 - Problem Description: Collect samples, photos, videos, and related evidence.

D3 - Temporary Action: Provide emergency replacement, sorting solution, or usage guidance.

D4 - Root Cause Analysis: Analyze problems using Fishbone Diagram and 5 Why Analysis.

D5 - Corrective Action: Develop and implement permanent improvement solutions.

D6 - Verification: Track improvement results for at least 3 production batches.

D7 - Preventive Action: Apply improvements to related products and processes.

D8 - Final Report: Issue 8D report and update FMEA database.

8D Report Submission Time:

  • P1 Quality Issues: Within 5 working days
  • P2 Quality Issues: Within 7 working days

4. Value-Added Services

Free Sampling Service

Provide up to 3 rounds of free samples during new project development, including different material and process comparisons.

Label Application Testing

Provide 100-500 pcs trial samples to help customers verify production line labeling performance.

Technical Training

Provide 1-2 online technical training sessions annually, covering material selection, labeling optimization, and problem solving.

Customized Packaging Solutions

Provide customized packaging solutions including:

  • Roll labels
  • Sheet labels
  • Inner box marking
  • Carton labels
  • Barcode solutions

5. Warranty Commitment

  • Standard Warranty: 12 months from customer receipt date.
  • Special Environment Warranty: For outdoor, freezing, chemical, or special applications, warranty terms can be discussed according to actual conditions.
  • Warranty Coverage: During warranty period, quality problems caused by material or workmanship defects, including adhesive failure, fading, blurred printing, and die-cut deformation, will be replaced by us.

6. Continuous Improvement Mechanism

We provide customers with quarterly Quality Performance Reports (QPR) including:

  • Monthly delivery pass rate (Target ≥99.5%)
  • Customer complaint statistics and trend analysis
  • CAPA corrective and preventive actions
  • Process capability index (Cpk) monitoring data
  • Future quality improvement plans

Quality Policy

Based on international standards, centered on customer satisfaction, continuous improvement, and the pursuit of zero defects.

Naiss Label

Quality Printing Solutions For Global Customers

24-Hour Customer Service / Email Support

We would love to hear from you.

If you’ve got great products your making or looking to work with us then drop us a line.