TIEN YIH ENTERPRISE LTD. - TIEN YIH - Only one in the world: ISO 9001 certified and diversified manufacturer of custom shopping bags.

TIEN YIH Quality Assurance for Custom Shopping Bags | ISO 9001

Discover how TIEN YIH ensures custom shopping bag quality with ISO 9001 certification, strict inspection standards, and detailed tolerance specifications for all materials.

Quality Assurance & Inspection Standards for Custom Shopping Bags

Learn how TIEN YIH maintains superior quality control through ISO 9001 certification, comprehensive material testing, and strict AQL 2.5 inspection standards for all custom bag orders.

How to ensure the quality of custom shopping bags when placing an order with Tienyih?

TIEN YIH ENTERPRISE LTD. concentrates on custom shopping bag. It is rarely one- stop service and passed ISO 9001 manufacture in the world, but we are ISO 9001 certified that can custom paper bag, non-woven bag, canvas bag and insulated bag. Our quality policy: Integrity, Commitment, Innovation and Custom trust. Whether it is for customers, suppliers, or internal employees, we all follow the same principles as the basis for production.

What are the benefits of bulk purchasing?

TIEN YIH ENTERPRISE LTD. is good at mass production purchase order. Through multiple manufacturing and production capabilities, we will provide their own project plan to our customers based on their delivery time and quantity. A project plan includes raw material procurement, batch production schedule, inventory management and logistics deployment. During the contract period, we can ensure the stability of packaging costs, stable shipment and quality. This way can reduce the administrative and inventory management costs of batch purchases.

Tien Yih's quality inspection report and equipment

We have strict acceptability criteria for raw material. Take non-woven fabrics for example. SGS inspection raw materials are free of heavy metals, plasticizers, and fluorescent agents. We select eco-friendly water-based ink, and our suppliers also provide relevant inspection reports. We provide the test report includes the burst strength of raw material, tensile strength test, swing test and load test.

The scope of tolerance for custom shopping bag raw materials

Tienyih has accumulated 30 years of experience, and is very familiar with the raw material of promotional bags such as Kraft paper, non-woven fabric and cotton canvas fabrics. Before mass production, we will D-check with Pre-production sample which confirmed by customers. We keep the production records, and inspected by ourselves in order to ensure product quality. Here are some tips for the scope of tolerance for custom shopping bag raw materials:

Non-woven Shopping Bag:
  1. THICKNESS / WEIGHT: ± 10g/m²
  2. Size: ± 2cm
  3. Handles length: ± 2cm
  4. There will be an asymmetry of ± 2cm on top hem of front and back panels
Paper Bag:
  1. THICKNESS / WEIGHT: ± 10%
  2. Size: ± 1cm
  3. Paste papers: ± 0.5cm
Canvas Bag:
  1. THICKNESS / WEIGHT: ± 1OZ
  2. Size: ± 1cm
  3. There will be an asymmetry of ± 1cm on front and back panels.
Thermal Insulation Foam:
  1. THICKNESS / WEIGHT: ± 0.5mm
Quantity of delivery, inspection standards and manage defective products after shipment

Tienyih will formulate the proportion of production quantity loss according to our production experience. The actual delivery quantity can only be confirmed after production. Before placing an order, we will communicate the tolerance of the delivery quantity with our customers to ensure that the delivery quantity can meet their demand, and the payment will be requested based on the actual delivery quantity.

The quality inspection standard is based on the international AQL 2.5. Before shipment, we will inform our customer site acceptance by phone or mail.

According to defective products, you can make any dissent within seven days after receiving the goods. After discussion between the two parties, the quantity can be reduced, or the re-production by way of return and exchange (reproduction takes 30 - 45 working days).

How can we guarantee that our custom shopping bags meet consistent quality standards across large bulk orders?

TIEN YIH's ISO 9001 certification combined with AQL 2.5 international inspection standards ensures every batch of custom shopping bags meets strict quality benchmarks. With 30 years of production experience, we provide detailed pre-production samples for your approval, comprehensive material testing (burst strength, tensile strength, load testing), and transparent tolerance specifications for non-woven, paper, canvas, and insulated bags. Our quality-first approach guarantees consistency, reduces administrative costs, and stabilizes packaging expenses across your entire procurement cycle.

TIEN YIH's comprehensive quality management system delivers peace of mind for bulk purchases through detailed project planning that covers raw material procurement, batch production scheduling, inventory management, and logistics deployment. Before mass production, customers receive pre-production samples (D-check) for approval, ensuring design accuracy and material specifications. The company follows international AQL 2.5 inspection standards and provides transparent communication regarding delivery quantity tolerance based on 30 years of production experience. For defective products, TIEN YIH offers a seven-day dispute window with flexible solutions including quantity reduction or reproduction (30-45 working days), demonstrating commitment to customer satisfaction. By partnering with TIEN YIH, retailers, promotional packaging companies, and international brands gain factory-direct access to eco-friendly custom shopping bags with verified quality certifications and proven manufacturing excellence.