THE SPECIFICATION IS AS FOLLOWING : 1. Method of bleaching- using Peroxyde of Hydrogenium.2 . Whiteness : 85 93 3. Sinking Time :6 sec. Max4. PH 5,5-7,5. 5.Water holding capacity: 1g cotton holds 23g water. 6. Surface active substances: less than 2mm. 7. Humidity <8%. 8. Fluorescence- not present.9 . Fiber Length :13 16mm If you need please call me at +8618751003703 Ms Phoenix Tao