Advanced Formulation
Color Correction Scenarios
Underlying Pigment & Tonal Shift
Developer Chemistry
Color Law & Science
100

A level 5 client wants a cool level 7. You’ll need to formulate with this tone.

What is blue or blue-violet to neutralize orange?

100

A client’s hair is brassy orange after bleaching. What toner base should you use?

What is blue?

100

The exposed pigment at level 6 is this.

What is orange/red?

100

This volume of developer lifts 1–2 levels with deposit.

What is 20 volume?

100

Complementary colors on the wheel are used to do this in hair color.

What is neutralize unwanted tones?

200

When covering over 75% gray, your formula should include this percentage of neutral.

What is 50% or more?

200

You removed box black color, but it lifted unevenly. You should apply this before continuing.

What is a color balancing filler or protein filler?

200

Level 9 hair has this dominant underlying pigment.

What is yellow?

200

This developer is best for gray coverage and permanent color.

What is 20 volume?

200

The law of color states that all hair color is created from this.

What are the three primary colors?

300

You want to create a level 9 neutral blonde on level 5 hair. This process is required.

What is pre-lightening then toning?

300

A client’s blonde turned murky green. What’s the best solution?

What is apply a warm/red-based tone to neutralize?

300

As you lighten, the undertone shifts from red → orange → yellow. This is called this.

What is the law of contributing pigment or underlying pigment?

300

Using 40 volume developer with lightener does this to the hair.

What is lifts up to 4+ levels and swells the cuticle significantly?

300

Melanin is the pigment in hair. The two types of melanin are these.

What are eumelanin (black and brown pigment) and pheomelanin (red and yellow pigment)?

400

For maximum vibrancy when applying a vivid over prelightened hair, you should ensure the hair is at this level.

What is level 10/pale yellow?

400

Over-toned hair with violet-gray hues requires this type of tone to correct.

What is gold or yellow?

400

This term describes how the underlying pigment influences your final result.

What is tonal contribution or influence of undertone?

400

Using high-volume developer with a demi-permanent color (toner) can lead to this issue. 

What is ineffective deposit or unnecessary cuticle swelling (with no lift)?

400

This is the process of replacing missing pigment in hair that has been over-lightened or stripped.

What is repigmentation or filling?

500

To deepen a previously lightened client evenly, you must do this before applying final color.

What is a filler or repigmentation step?

500

You need to correct an overly ash root melt into warm mids. Your best option is this

What is neutralize ash at roots with warmth and balance tone through midshaft?

500

You lightened a level 3 to a level 8. Expect this undertone and adjust with this toner.

What is orange/yellow, tone with blue/violet?

500

Developer works through this chemical process that removes melanin.

What is oxidation or the oxidation-reduction reaction?

500

To go from level 10 platinum to level 4 rich brunette without green undertones, you must do this.

What is fill with warm tones (copper/gold) before applying brown?