Determining Textile Aqueous Extract Ph Values Using ISO 3071 Methods
ISO 3071 specifies 0.1 mol/L KCl extraction at a 20:1 ratio to measure textile surface ion exchange and prevent false compliance readings.
ISO 3696 Grade 3 Water
Purity Classification
Laboratory water standards for textile testing define specific chemical and physical limits for dissolved ions to prevent contamination of test specimens. Using iso 3696 grade 3 water ensures that routine analyses such as pH measurements and dye extraction tests are free from interference by mineral impurities. This grade represents water of sufficient purity for wet chemistry work and general reagent preparation in mills.
Consistent purity maintains the reliability of the test results.
Chemical Property
Electrical conductivity is the primary metric for assessing the concentration of inorganic ions in the water. For iso 3696 grade 3 water, the electrical conductivity must not exceed five microsiemens per centimeter at twenty-five degrees Celsius. This limitation ensures that no mineral salts interfere with the pH extraction of the textile specimen.
Low dissolved solids content minimizes electrochemical interference during measurement.
Testing Application
Textile laboratories utilize this medium for preparing dye solutions and washing test specimens in standard colorfastness trials. When analyzing wool or cotton extraction under iso 3696 grade 3 water, the absence of active chlorine prevents fiber damage and color changes that would skew the evaluation. The water is suitable for most general wet processing tests.
Preparation Method
Reverse osmosis or single distillation processes produce the required purity from municipal water supplies. This water must be stored in polyethylene or borosilicate glass containers to prevent the leaching of silica into the iso 3696 grade 3 water before testing.