AATCC EP-5 pdf free download

AATCC EP-5 pdf free download.Fabric Hand: Guidelines for the Subjective Evaluation of.
1. Purpose and Scope
1.1 This evaluation procedure describes guidelines for the presentation of fabrics fbr the evaluation of hand. Its purpose is to standardize the conditions under which a fabric is evaluated for one or more of the constituent elements of hand (for references on constituent elements of hand see Appendix A).
1.2 These guidelines may be used in the following circumstances:
1.2.1 When different people at different times wish to follow the same protocot for examining fabrics.
1.2.2 In training evaluators to detect and distinguish among different constituent elements or components of hand.
1.2.3 When an individual wishes to duplicate the conditions under which a fabric has been previously evaluated.
1.2.4 With a panel of individuals evaluating the same fabric(s).
2. Principle
2.1 An evaluator is presented a specimen in a prescribed manner and is asked to handle the specimen in a prescribed sequence.
3. Terminology
3.1 hand, n.— -the tactile sensations or impressions which arise when fabrics are touched, squeezed, rubbed or otherwise handled.
3.2 constituent elements of hand, n.—those components, qualities, attributes. dimensions, properties or impressions which make the sensation of touching one fabric different from that of touching another.
NOTE: The various terms comprising elements of hand can be categorized by physical attributes of compression, bending, shearing and surface (see Appendix A).
4. Uses and Limitations
4. 1 Effective use of these guidelines is limited by the ability of the evaluator to describe the sensations being felt. Care should be taken to determine if any evaluator exhibits impairment in touch and to determine if any variation between evaluators exists.
4.2 The validity of the data collected will be dependent on prior agreement regarding which constituent elements of hand are to be evaluated and mutual acceptance of a scale for evaluation.
5. Specimens
5.1 Test Specimens.
5. 1. 1 Take large enough test specimens from each sample to allow an evaluator to hold the specimen in both hands. In general, cut all specimens to greater than 200 mm (8 in.) and less than 900 mm (35.4 in.) in either length or width direction. All specimens are to be cut to the same size and shape, even if ratings are done at different times/dates.
5. 1.2 Identify the length and width direction of each specimen to provide a means to assess differences that may exist.
5.1.3 Avoid using a specimen more than one time for evaluation because stretching and crushing may change the fabric hand.
5.1.4 The number of specimens of each sample used is to be consistent with accepted statistical analysis and with the number of evaluators.
5.2 Specimen Marking.
5.2.1 Prior to conditioning and evaluation. specimens are to be prepared and marked by someone other than the evaluator.
5.2.2 Mark specimens to denote sample and specimen identification, the surface of the specimen to be evaluated and the length direction of the fabric (see 5.1.2). Use a pen or pencil, not attached labels, to mark the specimens with identification, directional and surface informati on.
5.2.3 Condition specimens from the dry side fora minimum of 4 hat 21 ± 1°C (70 ± 2°F) and 65 ± 2% RH prior to evaluation. Report if other conditions are used (see 9.6).AATCC EP-5  pdf download.