Hey there! As a supplier of knitted interlining, I know how crucial it is to ensure the quality of our products. After all, the quality of knitted interlining can significantly impact the performance and durability of the final garment. In this blog, I'll share some practical methods on how to test the quality of knitted interlining.
Visual Inspection
The first step in testing knitted interlining is to conduct a visual inspection. This is a simple yet effective way to spot any obvious defects at a glance. Lay the interlining on a flat surface under proper lighting, and check for holes, snags, or uneven knitting. These kinds of flaws can weaken the interlining and cause problems during the garment - making process or in the final product's use.
Another thing to look for is color consistency. If the interlining is supposed to be a single color, make sure there are no noticeable color variations or streaks. Inconsistent coloring might indicate issues with the dyeing process, which could affect its overall appearance and quality. With our Lightweight Lining Fabric, we take extra care to ensure a uniform color, so you see a consistent and high - quality look when you do your visual check.
Tensile Strength Testing
Tensile strength is a key indicator of the quality of knitted interlining. It refers to the ability of the interlining to withstand pulling forces without breaking. A high - quality interlining should have good tensile strength to ensure it can hold up during the garment's manufacturing, wearing, and washing processes.


To test the tensile strength, you can use a simple DIY setup. Cut rectangular samples of the interlining according to standard dimensions. Then, attach the sample to two fixed points and gradually apply a pulling force. You can use weights or a small - scale pulling device for this purpose. Measure the maximum force the sample can withstand before it breaks. Compare the results with industry standards to gauge the interlining's quality. Our team always tests the tensile strength of Tricot Lining Fabric to ensure it meets or exceeds the expected levels, so it can serve you well in your garment - making projects.
Shrinkage Testing
Shrinkage is another critical factor when it comes to knitted interlining. Nobody wants a garment to shrink or distort after the first wash, right? To test the shrinkage rate of the interlining, cut a square or rectangular sample and mark clear, accurate dimensions on it.
Wash the sample in a washing machine according to the recommended settings for the interlining. After washing, let it dry naturally. Then, measure the dimensions of the sample again. Calculate the difference in dimensions to determine the shrinkage rate. For a high - quality knitted interlining, the shrinkage rate should be within an acceptable range. Through strict shrinkage testing, we ensure that our interlining, like the Bump Interlining Fabric, maintains its shape and size after laundering, providing long - lasting performance for your garments.
Adhesion Testing
If the knitted interlining is an adhesive type, adhesion testing is essential. Good adhesion is necessary for the interlining to bond properly with the fabric, ensuring the garment's structure and stability.
To perform an adhesion test, adhere a sample of the interlining to a piece of fabric according to the specified bonding conditions, such as temperature and pressure. Then, try to peel the interlining from the fabric. A high - quality adhesive interlining should have a strong bond, and the peeling should require a significant amount of force. If the interlining comes off easily or leaves residue on the fabric, there might be problems with the adhesive quality. We extensively test the adhesion of our adhesive interlining products to guarantee reliable performance in real - world applications.
Softness and Hand - feel Testing
The softness and hand - feel of knitted interlining greatly influence the comfort of the final garment. After all, you want your customers to feel comfortable wearing the clothes you make.
To test the softness, simply touch and feel the interlining with your hands. A high - quality interlining should have a smooth, supple texture without any rough or stiff areas. You can also compare it with other samples of known high - quality interlining to get a better sense of its softness level. Additionally, consider how the interlining drapes. A well - made interlining should drape nicely, following the natural curves of the body, which is important for both the appearance and comfort of the garment. Our team is constantly working on improving the softness and hand - feel of our interlining products to provide the best user experience for you.
Breathability Testing
Breathability is an important aspect, especially for garments worn close to the skin. A breathable interlining allows air to circulate through the fabric, preventing the build - up of heat and moisture.
One simple way to test breathability is the "warm - hand test." Place your hand on the interlining and then cover it with another piece of fabric for a short time. If you can feel warmth and moisture building up quickly, the interlining might have poor breathability. A more accurate method is to use a professional breathability tester, which measures the rate of air permeation through the interlining. We recognize the importance of breathability and make sure that our knitted interlining allows for good air circulation, so your garments will be comfortable to wear in various situations.
Color Fastness Testing
Color fastness is crucial, especially if you're using the interlining in high - quality or fashion - forward garments. You don't want the color to fade or bleed onto other fabrics. To test color fastness, you can perform a simple wet - rubbing test. Dampen a white cloth and rub it gently on the interlining. Check if there is any color transfer onto the white cloth.
For a more comprehensive test, you can also wash the interlining sample with other light - colored fabrics and observe if there is any color bleeding. High - quality knitted interlining should have good color fastness to ensure the long - term appearance and quality of the garment. We take color fastness seriously and have strict quality control measures in place to ensure our products meet the highest standards.
In conclusion, testing the quality of knitted interlining is a multi - step process that involves various aspects, from visual inspection to technical tests. By conducting these tests, you can ensure that the interlining you use in your garments meets the requirements and provides the best performance.
If you're in the market for high - quality knitted interlining, I'd love to have a chat with you. We're committed to providing top - notch products and excellent service. Feel free to reach out for more information and start a purchase negotiation. Let's work together to bring your garment - making ideas to life!
References
- Textile Testing Manual by ASTM International
- Encyclopedia of Textiles and Apparel Quality Assurance

