Hair keratin begins to denature at 356°F (180°C). A healthy strand can tolerate brief high heat because the cuticle acts as a thermal buffer — but repeated passes, wet strands, or damaged hair remove that buffer entirely. The goal of a silk press is not to cook the curl out; it's to use one precise pass at the right temperature to temporarily reorient the hydrogen bonds in the cortex. Your GK Keratin treatment creates a protein lattice across the cortex that both improves heat tolerance and makes results last longer — this is why your silk press will behave differently than an untreated natural.

Your hair profile rule: Fine strands = start at 370°F max. The 4A sections (back + perimeter) tolerate slightly more than the 3C top. Never exceed 400°F on fine strands. One slow pass, then you're done.

Blow dryer temperatures under 200°F (93°C) sit well below the keratin denaturation threshold. At this range, you're using heat for two purposes: drying (removing water weight that causes breakage during manipulation) and stretching (elongating the curl pattern without disrupting its hydrogen bond structure). The curl memory remains intact — the style will revert with water, unlike a silk press.

Low heat is your highest-frequency styling tool. It's used after every wash day for a diffused wash & go, for blow-out prep before a twist out, and for "heat stretching" — the technique that makes protective styles last longer and reduces single-strand knots by keeping hair elongated. Key insight from research: A 2019 study published in International Journal of Trichology found that hair dried with a dryer at a moderate distance caused less surface damage than air drying, because prolonged water contact causes the cortex to swell and stress repeatedly (hygral fatigue). For high-porosity hair like yours, fast removal of water = less damage, not more.