Lawson and Katam shipped by DHL arrived a few days later to Boston, US. Nice! First time i applied Lawson and Katam 50/50 on my roots using three TSP each. Only use for some but increasing white hairs on my roots. Smooth mixture and easy to apply with no drips. I used a foil cap and wrapped a heated hair towel above it and then let it sit for four hours (reheating the towel every half hour). I did not wash my hair after with diluted shampoo (which I later regret) as you recommended, but did a final cold rinse with diluted apple cider vinegar. My hairs felt really smooth, look shinier, and a little darker than my natural black/dark brown hair. The white hairs turned a light reddish/brown orange that compliment some of my lighter brown hair. A day later, my head itch like crazy because I skipped the shampoo part, which I did do on my second henna three weeks later with no itch! Thank you!