How to ensure the quality of custom shopping bags when placing an order with Tienyih? | Custom Shopping Bag Manufacturer | Non Woven, Canvas & Paper Bags

How to ensure the quality of custom shopping bags when placing an order with Tienyih? | Sustainable paper bags for retail.

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

TIEN YIH’s FAQ page helps buyers quickly understand our custom shopping bag manufacturing services, including non woven bags, cotton canvas bags, kraft paper bags, insulated bags, sublimation printed bags, laminated bags, tote bags, take-out bags, and promotional packaging bags. Here you can find useful answers about material selection, printing methods, bag structures, handle options, customization process, order requirements, sample development, and production support.

Whether you are sourcing reusable bags for retail stores, supermarkets, food delivery, trade shows, promotional campaigns, or sustainable packaging programs, our FAQ section helps clarify common buyer concerns before placing an order. Learn how TIEN YIH supports international buyers with factory-direct custom bag solutions, flexible design options, wholesale production, and practical packaging recommendations for different business applications.