Chemical Services is 1 of 13 topics on the Texas Class A Barber written exam — part of fadejunkie's 299-question practice bank. Below are 15 real Chemical Services questions with real answers.
A client on finasteride for hair loss asks what side effect they should watch for. What's the one most commonly flagged?
Changes in sexual function. Finasteride is linked to changes in sexual function in some users — that's the side effect clients are typically warned about.
Which hair characteristic determines how well a client's hair will absorb haircolor?
Porosity. Porosity, how open the cuticle is, governs how much and how fast hair absorbs haircolor product.
Is red considered a warm or cool tone on the color wheel?
Warm — blue, green, and violet are the cool ones.
What's the barbering term for how warm or cool a haircolor reads?
Tone.
Hair that's too porous to hold color evenly needs something applied first to even out the absorption before the final formula goes on. What's that corrective product called?
Fillers. Fillers even out porosity and deposited color before the final formula, giving you a more predictable result on damaged or over-porous hair.
What's the primary oxidizing agent used to develop haircolor?
Hydrogen peroxide. Hydrogen peroxide is the standard oxidizing agent that activates color developers and lightens the natural pigment during processing.
Red and blue are two of the three primary colors on the color wheel. What's the third?
Yellow. Red, blue, and yellow are the three primary colors — every other hue on the wheel is mixed from those three.
What's the actual reducing agent found in alkaline perm solution?
Ammonium thioglycolate. Ammonium thioglycolate is the reducing agent that breaks the disulfide bonds in alkaline perm solutions — alkanolamines are used to raise the pH, not to reduce the bonds.
Which relaxer type has been around the longest and remains the most widely used?
Sodium hydroxide. Sodium hydroxide relaxers are the oldest and still the most common type on the market, even with gentler alternatives now available.
In perm and lightening services, an 'activator' goes by another common industry name. What is it?
Accelerator. Accelerator and activator are used interchangeably in the industry for the additive that speeds up processing.
A client wants their previously colored hair restored to match their natural shade. What's that service called?
A tint back. A tint back is specifically the service of coloring hair back to its natural shade — retouching just addresses new growth, and pre-softening is a prep step.
Dandruff shampoos rely on a cationic (positively charged) ingredient to do their job. What is it?
Quaternary ammonium compounds. Quaternary ammonium compounds are the cationic ingredient at work in most dandruff shampoo formulas.
Why should you avoid judging a client's existing haircolor under fluorescent lights?
Fluorescent bulbs distort how color looks. Natural or incandescent light gives you a true read.
Roughly what pH range do most hair conditioners fall into?
3.0 to 5.5. Conditioners are formulated acidic, typically in the 3.0 to 5.5 range, which helps close the cuticle after a more alkaline service.
Why steer clear of aniline derivative tints on a mustache?
They carry a real allergy and irritation risk that close to the eyes and mouth — safer options exist for facial hair color.
These are a sample. Try the Chemical Services practice quiz or flip through the Chemical Services flashcards for free. A one-time $15 lifetime pass unlocks full multi-topic study and the complete 299-question bank across all 13 tested topics.
Chemical Services is one of 13 topics tested on the Texas barber written exam. See the Texas Barber State Board Exam Guide for the full exam process, or browse every topic on the Practice Question Hub or the Education Hub.