Application & typical recommended dosage: GC-S is the most effective & most safety hair straightener as known so far, it will lead the trend of hair care and make it true to enjoy hair beauty comfortably and without worries. 15%--25% Benefits: High-effective in straightening hair and significantly reduce hair volume. Without formaldehyde and glyoxal which cause cancer. Meet OSHA. Shorter time of hair treatment than formaldehyde having to be left in the hair for 72 hours for better straightening. Significantly increase the ease of combing of hair with frizz reduction. Higher naturally radiant shine than formaldehyde. More resistant to humidity absorption Storage: In accordance with local regulations, store in original container protected from direct sunlight in a dry, cool and well-ventilated area. Keep container tightly closed and sealed until ready for use. Package:  200kg/drum or 25kg/drum