Obsidian

Most demi-permanent blacks read as a wet shadow on dry hair. Obsidian carries a cool blue undertone that catches light, so the depth never collapses into a single matte plane. Use it where a permanent jet-black would be overkill but the client still wants the full depth of a level 1.

The client who walks in with naturally near-black hair that has dulled, faded warm at the lengths, or absorbed coppery oxidation from the last colour. Also the corporate client who wants the visual authority of true black without committing to a permanent grow-out.

• Asian and Mediterranean clients refreshing natural-black bases
• Clients with permanent black 4–6 weeks post-service, faded to brown-warm
• Editorial / fashion-week looks calling for high-contrast jet

Apply neat to clean, towel-dried hair. The blue undertone does the heavy lifting — no need to add a violet or ash booster. Process for the full 20 minutes to lock the depth into the cuticle. Expect 6–8 weeks of true depth before noticeable warm shift.

• Clean midshafts and ends — no shampoo barrier
• Process 20 minutes; do not undercook a level 1
• Rinse cool to seal the cuticle and lock the blue reflect