Demi Hair Assalt Deep
DEMI Hair Assalt Deep is the professional Japanese hair color solution for clients seeking rich, natural brunette results with complete gray coverage. The 10+ in-stock shades span depth levels D-4 through D-9 - covering the full natural dark-to-light brown range - and each depth is available in Warm Beige (WB), Cool Beige (CB), or Bright Beige (BB) tone options. The formula combines DEMI's low-ammonia oxidation technology with built-in conditioning agents, producing a smooth, shine-rich finish after processing. It is designed for repeated professional salon applications on the same client without compounding dryness or texture degradation.
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Buying guide
DEMI Hair Assalt Deep: Choosing Shades and Getting Salon-Quality Results
DEMI Hair Assalt Deep covers the professional Japanese hair color series that delivers rich, naturally dimensional brunette results across depth levels D-4 to D-9. This guide is written for colorists and salon professionals who want a clear map of the shade system, practical advice on developer pairing, and guidance on where this line fits within a client's ongoing color plan.
Which Clients Benefit Most from DEMI Assalt Deep
DEMI Assalt Deep is best suited for clients with natural or previously colored brown hair who want gray coverage, a color refresh, or a slight depth adjustment within the natural brunette range. It is not a high-lift or fashion color product. Clients who say they want to 'get back to their natural color,' 'cover grays without looking unnatural,' or 'make their hair look healthy and dark again' are the target profile for this line.
How the Shade Structure Works: Two Axes
Every Assalt Deep shade has two coding elements: a D number for depth (D-4 darkest, D-9 lightest in the range) and a tone suffix (WB, CB, or BB). The D number sets how dark the result will be; the suffix sets the warmth or coolness of the brown. Choosing the right shade means making both decisions clearly rather than defaulting to a shade name that seems approximate. A client who says 'medium brown, not too warm' would be placed at D-7 CB or D-7 BB, not D-7 WB.
Why DEMI's Low-Ammonia Formula Matters for Repeat Services
One of the practical advantages of DEMI Assalt Arias over higher-ammonia European color lines is the reduced cumulative damage across repeat services. Lower ammonia means less cuticle disruption per application. For clients who color every six to eight weeks for years, this compounds into a meaningfully better hair texture and less breakage over time. DEMI also includes conditioning polymers in the color base, which leave the hair feeling smoother after the first rinse without a separate treatment step.
Selecting the Right Depth for the Client
Start by assessing the client's natural or underlying processed depth. Match or go one level darker than the existing depth for a refreshing result. For gray blending rather than full coverage, going one level lighter than the main base (for example, D-7 on a D-8 natural base) creates a softer root-to-end blend that extends grow-out gracefully. For complete gray coverage on a dark natural, D-5 or D-7 at 1:1.5 with 3% developer will give reliable, even results.
Matching Tone Variants to the Client's Complexion
WB (Warm Beige) works best with golden, olive, and yellow-based skin undertones. CB (Cool Beige) is a better fit for pink, neutral, or cool-based skin tones and for counteracting previous brassiness. BB (Bright Beige) is the most universally flattering option with no strong warmth or coolness - it suits a wide range of skin tones and is the lowest-risk choice when there is uncertainty about the client's undertone. In practice, many colorists use BB at first visit and adjust to WB or CB on the second visit based on the client's reaction to the initial result.
Developer Selection: When to Use 3% vs 6%
Use DEMI's 3% (10 vol) developer for gray coverage and tonal deposit without any lift. The result will match the depth on the shade card closely. Use 6% (20 vol) if the client's natural hair is slightly darker than the target depth and one level of lift is needed alongside the deposit. Avoid 9% (30 vol) or higher within the Assalt Deep line, as the increased lift will introduce unwanted warmth during the oxidation phase and pull the result away from the calibrated WB, CB, or BB axis.
Application Differences: New Color vs Regrowth
For first-time color, apply the mixed formula from roots to ends in one step, working section by section from the nape upward. For regrowth services, apply only to the new growth and keep the application off previously colored hair unless a deliberate tone refresh of the mid-lengths is part of the service plan. Overlapping color on ends repeatedly builds up a darker, heavier zone at the root junction that becomes harder to correct over time.
Post-Color Care Instructions for Clients
Advise clients to wait 48 hours before the first shampoo, use color-safe sulfate-free products, and apply a heat protectant before any thermal styling. The CB (Cool Beige) variants are more prone to fading toward warmth as the ash tones are water-soluble and wash out faster. A blue-tinted shampoo used once or twice a week between services helps CB clients maintain the cool tone for longer between visits.
What to Stock If You Are New to DEMI Assalt Deep
If you are stocking the Assalt Deep range for the first time, D-5 WB, D-5 BB, D-7 WB, D-7 BB, and D-7 CB cover the highest-demand segment of the natural brunette range and work across the widest variety of client profiles. D-4 WB is valuable for dark-hair clients and dense gray, and D-8 WB or D-8 CB fills in the lighter medium brown requests. These seven shades will handle the majority of Deep Natural color services without requiring the full shade matrix at opening.
FAQ
Frequently asked questions
FAQ
Frequently asked questions
What does the D number mean in DEMI Hair Assalt Deep shade names?
The D number is the shade depth on a 1 (black) to 10 (lightest blonde) scale. In the Assalt Deep range, D-4 is the darkest (dark brown) and D-9 is the lightest (light brown) available. D-5 to D-7 covers the medium to medium-dark brown range that most natural brunette clients fall into. The D number tells you how dark the result will be, independent of the warmth or coolness of the tone.
What is the practical difference between WB, CB, and BB in DEMI Assalt Deep?
WB (Warm Beige) adds golden warmth to the brown result. CB (Cool Beige) introduces an ash or cool quality that reduces brassiness and works well for clients with pink or neutral skin tones. BB (Bright Beige) is the most neutral, with a clean luminosity that suits a wide range of complexions without leaning warm or cool. When the client is undecided, BB is the safest default choice.
What percentage of gray can DEMI Hair Assalt Deep cover reliably?
At darker depths (D-4 to D-7) with a 1:1.5 ratio and 3% developer, the formula provides reliable coverage on hair with up to 80-90% gray or white hair. At lighter depths (D-8, D-9), very high white-hair concentrations blend rather than fully mask - producing a softer graduated result that many clients prefer over opaque coverage at lighter depths. For resistant gray, adding gentle salon heat reduces processing time and improves penetration.
What are the practical benefits of DEMI Assalt Deep's low-ammonia formula for long-term clients?
Lower ammonia reduces cuticle disruption per application. For clients who color every six to eight weeks over years, this translates to less cumulative dryness and breakage compared to higher-ammonia professional lines. The conditioning polymers built into the DEMI base also mean the hair feels smoother after rinsing without requiring a separate treatment step after every service.
What DEMI Assalt Deep shade is best for a client with naturally dark brown hair (level 4-5) wanting gray coverage?
D-4 WB or D-5 WB are the best matches for a level 4 to 5 natural base. D-5 WB is generally preferred because it reads definitively brown even in strong lighting, whereas D-4 can appear near-black in some lighting conditions. If the client prefers a cooler result, D-5 CB is the cooler alternative at that depth. Both provide reliable dense gray coverage with a 1:1.5 ratio and 3% developer.
Should I use D-7 or D-8 for a client wanting a medium natural brown result?
D-7 is medium brown and D-8 is light medium brown. If the client has a natural level in the D-7 to D-8 range, D-7 will give a slightly richer, more dimensional result while D-8 will be softer and lighter. For clients with existing gray who want to stay lighter, D-8 gives a more blended result. For clients who want coverage that fully matches their natural dark mid-lengths, D-7 is the more accurate choice.
What is the standard processing time for DEMI Hair Assalt Deep at room temperature?
Standard processing time is 30 minutes at room temperature. With gentle salon heat, this reduces to approximately 20 minutes. Do not process for longer than 40 minutes under any conditions - extended processing beyond the optimum window does not add coverage and risks scalp irritation or tone shift as the pigment continues to oxidize past the intended endpoint.
Can I mix two DEMI Assalt Deep shades together to create an in-between result?
Yes, custom shade mixing within the Assalt Deep range is a common professional technique. Mixing D-5 and D-7 in a 50:50 ratio will produce a result at approximately D-6. Mixing WB and CB variants can neutralize toward a BB-equivalent result. Keep a record of any custom mixes by weight so the result can be reproduced on the client's next visit.
How can I verify the DEMI hair color I receive from skinsli.com is authentic?
Skinsli sources DEMI products through authorized Korean and Japanese wholesale channels. Products arrive in original, sealed DEMI packaging with batch codes that match the Japanese domestic market. If any product you receive has damaged seals, missing labeling, or packaging that differs from DEMI's standard presentation, contact support with a photo and the batch code for verification and replacement.
How should I store DEMI Assalt Deep color tubes in a salon setting?
Store tubes at room temperature in a closed cabinet or drawer away from direct sunlight and heat sources. Avoid storage near sinks or in areas with high humidity fluctuation, as moisture can affect the tube seal over time. Mark opened tubes with the opening date and use within four to six weeks. Unopened tubes stored correctly remain stable for 24 to 36 months from the manufacture date printed on the tube.
Is a patch test required for each new DEMI Assalt Deep service?
A patch test is mandatory before the first service and should be repeated if three or more months have passed since the client's last color application. Apply mixed color to the inner arm, observe for 48 hours, and proceed only if there is no reaction. Sensitization to oxidative color ingredients can develop unexpectedly, including in clients with a long history of color services.
Which DEMI Assalt Deep shade will give the warmest, most golden brunette result?
D-5 WB produces the richest warm golden-brown in the medium dark depth range. At the lighter end, D-7 WB gives a warm medium brown with honey direction. For the warmest overall effect, use WB at the deepest practical depth for the client's goal, as warm pigment at darker depths reads as richer and more saturated rather than brassy.