Well, my hair is strong and used to need double relaxing when I did relax it and it never became super straight. So depending on your hairs porosity you may be able to. I usually waited about 4 days then redid it for another 15/20 minutes.

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3B Live Curly Live Free Analysis: Texture = Medium Porosity = Normal Elasticity = Normal
3b-ish... normal to low porosity....med. texture
Wash: Desert Essence Coconut shampoo, Acure argon shampoo
Deep Trestment: Nature's Nectars deep conditioner/styler
Condition: Nature's Nectars luv-n-a-bottle, Nature's Gate pomegranate sunflower
LEAVE-IN:Nature's Nectars luv-n-a-bottle, Natures Gate pomegranate sunflower
STYLE: Nature's Nectars Sweet Shea butter blend, Ecostyler gel
hemp oil, jojoba oil
www.naturesnectars.net