Understanding Hair Color
Techniques: Single vs.
Double Process
HAIR SALON
NEWBURRY BOSTON
blondeandbrondesalon.com
INTODUCTION
Hair coloring is one of the most transformative and
creative aspects of hairstyling. Whether you're
refreshing your natural shade, covering grays, or
opting for a bold new look, understanding the different
coloring techniques is essential for achieving the
desired result. Two foundational approaches in hair
coloring are single process color and double process
color. Though they may sound similar, they differ
significantly in technique, timing, purpose, and results.
In this guide, we will explore each method in detail to
help you make informed decisions—whether you're a
stylist, a student, or a client seeking clarity.
Before diving into single and double process coloring,
it’s important to understand what “processing” means.
Hair color processing refers to the chemical reaction
that occurs when hair dye is applied and left on the
hair for a specific amount of time. During this period,
the hair’s pigment is either deposited or lifted
(lightened), depending on the technique and products
used.
The type of process selected depends on several
factors, including:
The client’s natural hair color
The desired end result (lighter, darker, more
vibrant, etc.)
The hair’s current condition and history of
chemical treatments
Time and budget constraints
What Is Hair Color Processing?
What Is Single Process Color?
Single process color involves applying one color
formula to the entire head in a single step. This
method is widely used for covering gray hair,
darkening or lightening hair by a few levels, or
enhancing natural tones with richness and shine. It
is typically performed using permanent, semi-
permanent, or demi-permanent color.
Key Features of Single Process Color:
One-step application: The color is applied once
and processes uniformly across the hair.
Time-efficient: Usually takes 30–45 minutes,
making it a quicker option.
Low maintenance: Ideal for clients seeking
subtle changes or regular gray coverage.
Gentler on hair: Especially when using demi- or
semi-permanent formulas.
Common Uses:
Covering gray hair
Adding shine and tone to natural hair
Refreshing faded color
Slightly darkening or warming up the hair
color
Enhancing depth and dimension
What Is Double Process Color?
Double process color, as the name suggests, involves
two separate steps: first, the hair is lightened
(bleached), and second, a toner or color is applied to
achieve the final desired shade. This method is
typically used for dramatic transformations—such as
going from dark brown to platinum blonde or creating
vivid fantasy colors like pastels, purples, or blues.
Key Features of Double Process Color:
Two-step procedure: Lightening followed by
toning or coloring
High-impact results: Allows for significant color
changes
Customization: Offers precise control over tone
and vibrancy
Time-intensive: Takes longer than single process
(up to 2–4 hours or more)
Common Uses:
Achieving platinum blonde
Creating bold or pastel fashion colors
Correcting uneven or brassy tones
Lifting dark hair to a much lighter level
Removing previous color to start fresh
Both single and double process coloring techniques
offer unique benefits and suit different needs. While
single process color is ideal for subtle changes and low-
maintenance looks, double process color unlocks
dramatic
possibilities
and
vibrant
results.
Understanding these differences empowers clients to
make informed decisions and helps professionals
deliver exceptional, customized services.
When done thoughtfully and professionally, either
approach can result in beautiful, healthy hair that
reflects the client’s personal style and vision.