The method is based on subjecting the specimens to procedures simulating domestic laundering practices (one of the washing and drying procedures specified in ISO 6330 is usually used). Evaluation is performed by supplementing the overhead lighting arrangement with a spotlight suitably placed to highlight the creased area. The specimens are compared visually with plastic crease replicas under specified illumination.
ISO 7769:1992 history
2009ISO 7769:2009 Textiles - Test method for assessing the appearance of creases in fabrics after cleansing
2006ISO 7769:2006 Textiles - Test method for assessing the appearance of creases in fabrics after cleansing
1992ISO 7769:1992 Textiles; method for assessing the appearance of creases in durable-press products after domestic washing and drying
1985ISO 7769:1985 Textiles — Method for assessing the appearance of creases in durable press products after domestic washing and drying