Advanced Colorimetry and Grey Blending Course

Lesson 1 • The Color Wheel in Hair Context

Applies the standard color wheel to hair tones, warm-cool relationships, and tonal correction. Bridges abstract color theory to real-world hair color decisions.

Lesson 2 • Pigment Theory and Subtractive Mixing

Introduces primary, secondary, and tertiary pigments and subtractive color mixing rules. Provides the pigment logic underlying all hair color formulation decisions.

Lesson 3 • Physics of Light and Color

Covers electromagnetic spectrum, visible light wavelengths, and how surfaces absorb or reflect color. Establishes the physical basis for understanding hair color behavior.

Lesson 1 • The Biology of Grey Hair

Explains melanocyte decline, hydrogen peroxide accumulation, and the resulting loss of pigment. Establishes why grey hair behaves differently from pigmented hair during coloring.

Lesson 2 • Anatomy of the Hair Shaft

Details cuticle, cortex, and medulla layers and their roles in color uptake. Grounds formulation decisions in the physical structure of the hair strand.

Lesson 3 • Melanin Types and Distribution

Distinguishes eumelanin and pheomelanin and explains how their ratio determines natural hair color. Predicts underlying warm tones revealed during lightening.

Lesson 4 • Hair Texture and Density Considerations

Analyzes how fiber diameter and follicle density affect color saturation and processing time. Adapts formulation and timing to individual hair characteristics.

Lesson 1 • Tone and Reflect Notation

Decodes primary and secondary tone codes used in professional numbering systems. Allows precise selection of tonal direction for any desired result.

Lesson 2 • International Level System

Defines the 1–10 depth scale and explains how each level corresponds to melanin concentration. Enables accurate cross-brand level identification and formulation.

Lesson 3 • Reading and Interpreting Color Charts

Teaches systematic use of manufacturer color charts, swatch books, and digital tools. Builds confidence in selecting shades that match the intended result on diverse hair types.

Lesson 1 • Client History and Hair Analysis

Gathers chemical history, lifestyle factors, and previous color records to inform safe formulation. Prevents adverse reactions and sets realistic outcome expectations.

Lesson 2 • Consultation Documentation and Records

Establishes a consistent record-keeping system for formulas, results, and client feedback. Supports continuity of service and professional accountability over time.

Lesson 3 • Goal Setting and Expectation Management

Aligns client desires with achievable outcomes based on hair condition and grey level. Establishes a shared service plan that prevents dissatisfaction and builds trust.

Lesson 4 • Grey Percentage Estimation

Introduces visual and sectioning methods to estimate the proportion of grey in the overall head. Accurate estimation drives formula selection and coverage strategy.

Lesson 1 • Mixing Ratios and Formula Customization

Explains standard and modified mixing ratios and when to deviate from manufacturer defaults. Enables precise formula customization for resistant or porous grey hair.

Lesson 2 • Developer Selection for Grey Coverage

Matches developer volume to grey percentage, hair condition, and desired depth change. Prevents over-processing while ensuring sufficient oxidation for full coverage.

Lesson 3 • Coverage Requirements by Grey Percentage

Defines minimum pigment load needed for full coverage at each grey percentage range. Prevents under-formulation, which is the leading cause of coverage failure.

Lesson 4 • Selecting the Correct Depth and Tone

Guides depth and tone selection to match natural base while flattering skin tone. Balances coverage reliability with aesthetic harmony for each individual client.

Lesson 1 • Application for Resistant Grey Hair

Addresses the unique challenges of coarse, resistant grey strands that repel color uptake. Combines pre-softening, formula adjustment, and technique to overcome resistance.

Lesson 2 • Processing Time Management

Defines optimal processing windows for different grey percentages and hair conditions. Prevents under- or over-processing through disciplined timing protocols.

Lesson 3 • Root Application Methods

Covers brush, bottle, and fingertip application techniques for precise root saturation. Proper root application is the foundation of seamless grey coverage.

Lesson 4 • Sectioning and Parting Systems

Establishes systematic sectioning patterns that ensure complete saturation of all grey areas. Consistent parting prevents missed sections and uneven coverage.

Lesson 1 • Highlighting for Grey Integration

Uses foil highlights to soften the contrast between grey and pigmented sections. Creates dimension that makes grey appear intentional and stylish rather than neglected.

Lesson 2 • Grey Blending vs. Full Coverage

Defines the spectrum from full coverage to full grey embrace and the blending zone between. Helps clients and stylists choose the right strategy for lifestyle and maintenance goals.

Lesson 3 • Toning Grey Hair for Desired Effect

Uses toners and glosses to shift grey hair toward silver, pearl, or warm champagne tones. Transforms natural grey into a polished, intentional color result.

Lesson 4 • Balayage and Freehand Grey Blending

Applies freehand painting to create gradual, natural-looking transitions into grey. Reduces regrowth visibility and extends time between appointments.

Lesson 1 • Managing Chemical Damage During Correction

Establishes safety protocols for correcting color on compromised or over-processed hair. Balances the need for correction with the imperative to preserve hair integrity.

Lesson 2 • Diagnosing Coverage Failures

Identifies root causes of incomplete coverage including under-formulation, porosity, and resistance. Systematic diagnosis prevents repeating the same error in the corrective service.

Lesson 3 • Correcting Unwanted Cool or Ashy Tones

Resolves over-toned, muddy, or green-cast results on grey hair caused by excess ash pigment. Restores warmth and vibrancy without compromising coverage integrity.

Lesson 4 • Correcting Unwanted Warm Tones

Addresses brassiness and orange tones that emerge on grey hair after oxidative color. Applies complementary pigment logic to neutralize warmth without over-darkening.