Edge paint testing for handbags is primarily to ensure the durability and aesthetics of the product during actual use. Edge paint is a process used to treat the edges of leather or other materials, and its main functions include:

1.Edge protection: Preventing edge wear, fraying, or cracking, extending the bag’s lifespan.
2.Enhanced aesthetics: Making the bag’s edges smoother and cleaner, enhancing the overall texture and quality.

3.Water and stain resistance: High-quality edge paint has certain water and stain resistance properties, reducing damage from liquid penetration during daily use.
The purpose of edge paint testing is to verify the quality of the edge paint process, such as:
- Whether the edge paint is even, without bubbles or buildup;
- Whether peeling or cracking occurs after friction, high and low temperatures, and bending tests;
- Whether the color remains stable after long-term use, without discoloration or fading.
These tests ensure consistent product quality, thereby improving customer satisfaction.
How Does Fiedle Ensure Edge Paint Quality? — Solutions Forged from 24 Years of Experience
Based on our deep understanding of edge paint issues, Fiedle has established a comprehensive quality assurance system:
For example, how do we detect edge oil?

- Visual Inspection
Purpose: To check if the paint edge is evenly applied, and to ensure there are no bubbles, impurities, runs, or missed areas.
Method: Observe the edge under natural light or standard light source; check for color consistency and smooth, neat edges.
- Tactile Inspection
Purpose: To determine if the paint edge is completely dry, if the surface is smooth, and if it feels rough or sticky.
Method: Gently touch the paint edge with your finger to feel for smoothness and a smooth, non-grainy texture; ensure there are no uncured layers of oil.
- Flex Test

Purpose: To test the flexibility and adhesion of the paint edge, preventing cracking or peeling.
Method: Repeatedly bend the product edge multiple times (simulating high and low temperature environments); observe for cracks, peeling, or flaking.

- Abrasion Test
Purpose: To simulate everyday wear and tear and test the abrasion resistance of the paint edge.
Methods: Rubbing Test: Use a friction tester or cloth/sandpaper to rub the edge a certain number of times; check for peeling, discoloration, or severe wear of the edge paint.
- Water Immersion/Wet Rubbing Test:
Purpose: To verify the waterproof and stain-resistant properties of the edge paint.
Method: Wipe the edge several times with a damp cloth and observe for color loss or peeling; or immerse a portion of the sample in water for a period of time, then remove and dry it, and observe any changes.
- High and Low Temperature Test (Environmental Aging Test)

Purpose: To test the stability of the edge paint under extreme temperatures.
Method: Place the item in a high-temperature chamber (e.g., 60°C) and a low-temperature chamber (e.g., -20°C) for several hours each (environmental simulation instrument); after removal, check for cracking, softening, deformation, etc.
- Adhesion Test (Tape Test)
Purpose: To test the bonding strength between the edge paint and the material.
Method: Apply a special adhesive tape (e.g., 3M tape) to the dried edge paint surface and quickly peel it off;Observe whether the edge paint is taken away or peeled off.
Refer to the following industry standards:
Relevant requirements in QB/T 2880-2007 “Backpacks and Handbags”;
Relevant ISO or SATRA leather testing standards.
Over Fiedle’s 24 years in the manufacturing industry, we have observed a common challenge: too many products ultimately fail due to overlooked edge paint quality. It is precisely for this reason that we have established an industry-leading edge paint testing system — not merely to pass inspections, but to guarantee that every Fiedle handbag endures the test of time.
True quality is not defined by flawless perfection when new, but by the enduring elegance it maintains after years of use. When you choose a Fiedle handbag, you are selecting more than a product; you are embracing 24 years of our relentless pursuit of quality and our uncompromising dedication to every detail.
Let’s create something timeless — together.
Contact us today to discuss your project, request a sample, or simply learn more about how Fiedle craftsmanship can elevate your collection.