Application Note of Testing and Calibration Laboratory Competence Accreditation Criteria in Textile Testing Field

Scope This document is applicable to CNAS' accreditation activities for laboratories in the textile testing field. The items involving microorganisms in textile testing should meet the requirements of CNAS-CL01-A001 'Application Note for the Accreditation Criteria for Testing and Calibration Laboratories in the Field of Microbiological TestingRequirements for the Application Note of the Competency Accreditation Criteria in the Field of Chemical Testing. General 1. The laboratory shall establish and implement procedures related to laboratory safety and personnel health protection, and be equipped with safety protective equipment and facilities suitable for the detection range, including but not limited to personal protective equipment, smoke alarms, emergency sprays and Eyewash device, fire extinguisher, first aid kit, ventilation facilities, etc. 2. Personnel 6.2.2 The textile laboratory personnel shall meet the following requirements: a) When laboratory testing involves sensory testing, physical testing, chemical testing, dye fastness, microbial testing and other sub-fields, the laboratory is responsible for technical Managers should consist of several members and should be able to cover recognized sub-fields. The management personnel in charge of technology should have a bachelor degree or above in a related major, and have more than three years of laboratory work experience in a related field, or a college degree in a related major, and more than five years of work experience. If the academic qualifications do not meet the requirements, more than ten years of relevant professional work experience is required. The field of microbiological and chemical testing shall meet the requirements of application instructions in related fields. b) Persons with color vision/olfactory impairment cannot engage in color/taste evaluation or related testing activities. 2.3 Engaged in cotton hand pulling length, plush fiber hand pulling/hand row length, chemical short fiber mid-section normal density and fiber length, feather down content, cleanliness, fiber sensory qualitative, odor evaluation, pilling rating, color Personnel performing strong subjective testing work such as fastness rating and appearance rating should regularly evaluate relevant technical capabilities to ensure their continued competence. 3. Facilities and environmental conditions 3.1 Textile laboratory facilities and environmental conditions a) When testing requires sample balance and testing under specified temperature and relative humidity conditions, there should be a constant temperature and humidity room that meets the requirements of the standard; b) For textiles Color fastness, pilling, appearance and other items should be rated in a dedicated space to ensure that the rating results are not affected by other light sources in the adjacent area; c) The evaluation of odor should be carried out in a clean environment without abnormal odors . 6.3.2 The laboratory should establish a constant temperature and humidity room management and control program to effectively manage and control personnel entering the constant temperature and humidity area to ensure the stability of the constant temperature and humidity room temperature and humidity. 3.3 The temperature and humidity recorder or similar equipment should be used to continuously monitor the temperature and humidity of the constant temperature and humidity room to ensure that it is consistent with the specified temperature and humidity conditions. The temperature and humidity of different locations in the constant temperature and humidity room should be checked regularly. 3.5 When using venues and equipment outside the laboratory for appearance and weight inspection, the lighting device used for appearance inspection and its illuminance and the accuracy of scales and platform scales used for weight inspection shall meet the requirements of relevant standards. 4. Equipment 4.1 The textile laboratory shall be equipped with certified reference materials that meet the test requirements in accordance with the standards. If there is no certified reference material, the standard materials produced by authoritative institutions or recognized institutions in the industry can be used. Note: Textile standard materials include gray sample cards, sample photos, physical standards/standard samples, lining fabrics, blue wool standards, standard detergents, etc. 4.4 HVI cotton tester, fiber airflow fineness meter, etc. should preferably use certified reference materials or reference materials specified by standard methods for traceability. When the reference material cannot be obtained, the method of inter-laboratory comparison can be used. 4.10 The laboratory's periodic verification of reference materials can check the stability of reference materials through internal quality control results. Process requirements 2. Method selection, verification and validation 2.1 Method selection and verification 2.1.3 When using English standards as the test basis, unless the tester is proficient in using the foreign language standards, the laboratory should develop a Chinese work instruction. Other foreign language standards should have Chinese work instructions. Note: When multiple similar test standards are used to test the same item or parameter, the specific requirements of each method may be different, and it is not required that each test standard must have a work instruction, and a common one can be used to cover multiple similar Work instructions for testing standards, but must ensure that the differences between these testing standards can be clearly identified. 2.1.5 When changes in the laboratory may affect the implementation of the validated method, such as changes in the main parameters of the equipment, changes in environmental conditions, etc., the method verification should be repeated. 2.2 Method confirmation 2.2.1 When a laboratory uses a method beyond the scope of the standard, it should be confirmed in accordance with a non-standard method and developed into an internal technical document.
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