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HAIRBEAURON 4D PLUS [STRAIGHT]
4D
4D SeriesStraight

HAIRBEAURON 4D PLUS [STRAIGHT]

*There is a slight gap between the plates in a 4D Plus [STRAIGHT] which will disappear with repeated use. This is intentionally designed to eliminate unintended warping by allowing room for the plates to naturally close as a result of the introduction of heat and repeated use. When customers first use the HAIRBEAURON 3D & 4D Plus [STRAIGHT], we recommend warming the plates to maximum heat. This will make them significantly easier to close. With time, the ends will move closer and eventually, they will close fully and will be easier to close, even while cool.

Denaturation of hair proteins will occur when a high temperature of 360°F is applied to hair. Hair may even break off after 10 to 20 seconds. However, by using the HAIRBEAURON 4D Plus [STRAIGHT] at the high temperature of 360°F for an extended period of time, hair transforms into something beautiful.

※If you apply the high-temperature device to hair treated with coating agents or oils, their components may cause chemical changes due to the heat and damage hair. Please do not use in this way. By straightening the same section of unruly hair at a high temperature on a daily basis, you will experience increased luster and moisture and long-lasting straight hair with a silk-like texture. 

(Retail: $450.00)

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  • 01 4D-density flat iron — accessible entry into Bioprogramming™ straightening.
  • 02 Plates reshape the cuticle without water or product.
  • 03 Low temperature; safe for color-treated and chemically serviced hair.
  • 04 Pairs with a Repronizer 4D Plus (or higher) for the Mitsudonose technique.
Density 4D
Temp. range 120 – 360 °F
Plate / Barrel Bioprogramming ceramic
30mm
Weight 425 g
Voltage 100–240 V AC · 50/60 Hz
Warranty 2 years US market
Origin Assembled in Japan
Authorized BTD / US

4D-density Bioprogramming™ flat iron — an accessible entry into the HairBeauron straight line.

Clamp a section near the root and draw slowly through to the ends. Do not hold on one section for more than 30 seconds at high-temperature settings.

Low-temperature setting is viable for most textures. Safe on color-treated, chemically serviced, and fragile hair.

Pair with a Repronizer 4D or higher for the Mitsudonose technique.

Register within 60 days to activate the 18 Months US warranty.

The Equation for Beauty
P = λ(nD)t — Lumielina's Equation for Beauty

The power to become beautiful is a function of the density of the Bioprogramming field (D) and the time spent within it (t). Choosing a higher density is choosing a higher ceiling.

§ Why this D

Where 4D
sits.

Every Lumielina device is rated by the density of its ionic field. Higher D compresses more work into the same time — less heat exposure, more durable result. Pairs of equivalent D (Repronizer + HairBeauron) form the discipline of Mitsudonose.

Flagship
107D

The field device. Maximum density. Client hair no one else will touch.

High
27D

Fine hair that refuses to hold memory.

Pro
7D

Day-to-day professional work.

Core
4D • you are here

Entry point to the Lumielina system.

P-value ∝ D × t
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