Dennis Bernard Professional

Straightlines™

Experience the innovation of the STRAIGHTLINES® Smoothing and Straightening System driven by 4Bond Advanced Nanoplasty Technology. The 4Bond Advanced Nanoplasty Technology utilizes nanoparticles to achieve straight and smooth hair. These nanoparticles are infused into all STRAIGHTLINES® formulations. When applied to the hair, these nanoparticles penetrate the hair shaft, helping to realign the hair structure and reduce frizz, resulting in straighter and smoother hair. 

STRAIGHTLINES® formulas are plant-based offering a natural approach to hair care, harnessing the power of botanical ingredients to nourish and strengthen hair. Enriched with amino acids, STRAIGHTLINES® promotes healthy hair growth, repairs damage, and enhances shine. Moreover, the  formaldehyde-free formulation ensures gentle treatment, avoiding potential irritants and toxins, making it an ideal, effective and smart solution for those seeking beautiful, vibrant, luscious locks.  

10 products
Lasting results
12 months
Formaldehyde-free
0% formaldehyde
Aldehyde-free
0% aldehydes
For all hair shades
1 step mix

Lasts up to 12 months

Superior hair straightening

Transform frizzy, hard-to-manage hair into a sleek, shiny finish with STRAIGHTLINES™ Nanoplasty. Powered by 4Bond Advanced Nanoplasty Technology, this formaldehyde-free treatment uses heat and an amino-acid and vegan keratin enriched formula to realign hair for lasting straightening.

Results:
Smoother, straighter hair for 6 to 12 months, depending on hair growth.
Aftercare:
Help prolong results with STRAIGHTLINES™ Smoothing Shampoo and Masque.
Stylist holding STRAIGHTLINES™ One Step Permanent Straightening in the salon

Real salon results

From frizz to sleek

One service, up to 12 months of smooth, shiny, manageable hair, on brunette and blonde shades alike.

Curly, frizzy brunette hair treated with STRAIGHTLINES™, before
Curly, frizzy brunette hair treated with STRAIGHTLINES™, after
BeforeAfter
Drag to compare

  • Frizz gone

    Curly, hard-to-manage texture realigned into a smooth, sleek finish.

  • Mirror shine

    Amino acids and vegan keratin leave hair glossy and soft to the touch.

  • Built to last

    Smoother, straighter hair for 6 to 12 months, depending on hair growth.

1 step mix

Powered by nanoplasty technology

STRAIGHTLINES™ nanoplasty technology uses heat and an amino-acid-enriched, formaldehyde-free formula to realign hair for up to 6 to 12 months.

  1. 01

    Prep & apply

    Clarify hair and towel-dry. Apply the STRAIGHTLINES™ formula through the entire head, then cover and process according to hair type.

  2. 02

    Rinse, blow-dry & straighten

    Rinse excess product, leaving about 80% in the hair. Blow-dry completely, then flat iron in small sections at the recommended temperature and passes for your client's hair type.

  3. 03

    Cleanse & finish

    Let the hair cool, then wash and rinse with STRAIGHTLINES™ Smoothing Shampoo and Masque. Rinse and blow-dry to reveal the finished look.

Heat & passes by hair type

Flat iron settings

Customize every transformation with STRAIGHTLINES™ Nanoplasty. After processing and rinsing as directed, blow-dry hair completely, then straighten small sections with a titanium flat iron.

Straight320–356°FPasses 12–15
Wavy356–374°FPasses 15–20
Curly, color-treated374–392°FPasses 20–25
Curly, virgin392–419°FPasses 20–25
Coily, Type 4A320–356°FPasses 24–28
Coily/coarse, Type 4B320–356°FPasses 28–30

Stylist tip: Begin at the lowest recommended temperature and adjust for hair condition. Follow the complete service instructions.

Pro stylist tip+

Send clients home with STRAIGHTLINES™ Smoothing Shampoo and Masque to support their aftercare routine and help maintain their results.

Where to buy

Find STRAIGHTLINES™

STRAIGHTLINES™ is available through our distribution partners and local beauty distributors nationwide. Questions? Call us toll free at 1-800-541-5456.

STRAIGHTLINES™ products in a salon

Questions

FAQ

What is nanoplasty?

Nanoplasty is a permanent straightening service that uses heat and an amino-acid-enriched formula to realign the hair fiber. STRAIGHTLINES™ pairs it with vegan keratin for a smooth, shiny finish without formaldehyde or aldehydes.

How long do results last?

Results last 6 to 12 months, depending on hair growth and aftercare.

Is it safe for color-treated or blonde hair?

STRAIGHTLINES™ is formulated for all hair shades. As with any chemical service, perform a strand test and consultation before treating.

How is it applied?

It's a one-step mix. Clarify, apply, process, rinse leaving about 80% of the product in, blow-dry completely, flat iron in small sections, then cleanse and finish.

What should clients use at home?

Send clients home with STRAIGHTLINES™ Smoothing Shampoo and Masque to protect and extend their results.

Who can buy STRAIGHTLINES™?

STRAIGHTLINES™ permanent straightening is a professional product for licensed stylists and salons.