ASTM D3887 Fabric Density Test Standard
1. Scope This test method is applicable to all kinds of knitted fabrics, such as warp knitting, weft knitting and so on.
1.1 Overview of the method --- Use a magnifying glass and other instruments to measure the number of courses or wales per unit length in the warp or weft direction of the fabric.
1.2 Significance and usage --- This method is used for commercial shipment acceptance testing. If the buyer and seller disagree on the reported results, such as numerical deviation, etc., the buyer's and seller's test room should evaluate whether the samples were taken from the same batch of fabrics.
1.3 Instruments and equipment---Any magnifying or computing equipment (such as magnifying glass, ruler, small needle, microscope, etc.).
2. Sampling
2.1 Obtain samples in accordance with Section 6 or the agreement between the buyer and the seller.
2.2 Take a sample from a roll or batch with a width of at least 2 meters in length.
2.3 Constant temperature and humidity---Place the sample in a constant temperature and humidity chamber to constant weight (weigh every 2 hours, and the weight is constant when the difference between the first and last two weights does not exceed 0.1%).
3. Step
3.1 Measure the number of courses and wales outside 1/10 of the width and 0.5 meters (0.5 yards) from the end of a horse or roll.
3.2 Unless otherwise specified, the front side of the fabric is usually measured.
3.3 If the fabric contains 10 loops per cm (25 loops per inch) or more, measure the number of wales and courses of at least 5 cm (2 inches) at 5 different locations per lot.
3.4 If the fabric contains less than 10 loops per cm (less than 25 loops per inch), measure the number of wales or courses within at least 10 cm (4 inches) at 5 different locations per lot.
3.5 If the fabric has a pattern or pattern, determine the number of wales or courses in the entire cycle length of the fabric pattern.
3.6 Use a chart to represent 3.3-3.4 The number of vertical rows or columns/in 25 or more and less than 25. The minimum measurement distance is 2 inches (5 cm)
4 inches (10 cm) The number of measurements (position) 5 5 4. Calculate and calculate 5 different positions The average of the number of columns or columns per 2.5 cm (1 inch), to the nearest 0.1 columns or columns.
5. Report
5.1 Indicate that this test is performed in accordance with ASTM D 3887, and describe the materials and methods used.
5.2 Report the following:
-5.2.1 Average number of courses and columns per 2.5 cm (1 inch), first courses (wales/in) and then courses/in.
-5.2.2 List the size of the pattern cycle.
-5.2.3 List the temperature and humidity during the test, such as: standard environment for testing textiles, humidity conditions, etc.
6. Accuracy
6.1 Accuracy---This method has established the accuracy of horizontal and vertical density of knitted fabrics.
More about : Fabric Density Glass(Dual Lens)
Fabric Density Glass(Dual Lens) GT-C83B is designed for observing the warp, weft and density of various fabrics (cotton, wool, hemp, silk, chemical fiber fabric and blended fabric).
GESTER International Co.,Limited works very hard to understand your objectives, then create a program that can help you meet them.
With comprehensive knowledge on textile testing equipment,why not visit the highly recommended site GESTER Instruments to get a full appreciation of the best ?
GESTER International Co.,Limited has enlarged the scope of services, which can fully please customers' demands.
With a complete manufacturing plant, GESTER International Co.,Limited is able to meet the most stringent specifications, no matter the type of product. A dedicated team of experts handle these value-added services, ensuring that customer needs are met on time, consistently monitoring quality and performance of textile testing equipment to the highest international standards. Visit GESTER Instruments to learn more.
