GB/T 38134-2019General technical specification for professional clothing (English PDF)

4.1 Instructions for use

4.1.1 The instructions for use of professional clothing shall comply with the provisions of GB/T 5296.4.

4.1.2 The identification mark shall reflect its professional attributes and characteristics.

4.2 Size specifications

4.2.1 The size setting of professional clothing shall meet the requirements of GB/T 1335.1, GB/T 1335.2 or GB/T 6411.

4.2.2 The specifications of main parts shall be designed according to the relevant regulations of GB/T 1335.1, GB/T 1335.2 or GB/T 6411. the measured object; visually inspect at a distance of 60 cm; compare with the sample card of GB/T 250.

5.3 Determination of physical and chemical properties

5.3.1 Test the washing dimensional change rate in accordance with the provisions of GB/T 8630; use GB/T 8629-2017, A-type standard washing machine; set the washing program of 4G; for those that express washing by hand, set the washing program of 4H; for the drying method, use program A.

Test the dimensional change rate after dry cleaning in accordance with FZ/T 80007.3; use the mild dry cleaning method. For the dimensional change rate after washing, randomly select three finished products in the batch for testing; take the average value of the three products as the test result. If the test result includes shrinkage and elongation at the same time, take the average of the two samples of shrinkage or elongation as the test result. For the dimensional change rate of the woven fabrics, mark according to the corresponding measuring part; for the dimensional change rate of knitted fabrics, take the coat length and the chest circumference as the vertical and horizontal measuring parts. Take the trousers length and the crotch (measure from the bottom of the crotch in a direction perpendicular to the length of the trousers to the side of the trousers) as the vertical and horizontal measuring parts; take the average value of left and right crotch as the calculation basis in horizontal direction.

5.3.2 Test the lightfast color fastness in accordance with GB/T 8427-2008, of which the exposure is exposed to phase-I according to method 3.

5.3.3 Test the fuzzing and pilling performance of the finished product in accordance with the provisions of GB/T 4802.1-2008, in which the combed woven fabrics and ordinary knitted fabrics are executed according to method E; the loose-structure combed woven fabrics and carded woven fabrics are executed according to method F; the rest of the woven fabrics are executed according to Method D. Wool knitwear and wool-like knitwear are implemented in accordance with the provisions of GB/T 4802.3-2008; turn the combed product 14 400 r; turn the carded product 7 200 r.

5.3.5 Test the burst strength in accordance with GB/T 19976-2005; the diameter of the steel ball shall be (38 ± 0.02) mm.

5.3.6 For the appearance test method after washing, wash and dry the samples by 5.3.1; then, combine with the requirements in Table 1, and assess according to the assessment method in GB/T 21294.

5.3.7 For other items of physical and chemical properties, test in accordance with GB/T 21294. Among them, chose the single-fiber lining for the arbitration

5.3.4 Test the tear strength in accordance with GB/T 3917.2 […]