R0 Tattoo Removal

Immediate Repeat Passes Using PFD

Conventional laser tattoo removal typically uses nanosecond Q-switched lasers such as Nd:YAG 1064 nm to fragment pigment.
With the traditional approach, you treat once, wait 6–8 weeks, then repeat—often 10+ sessions in total.

The R0 method was developed to shorten this journey.

What is the R0 Method?

R0 is a protocol in which the same area is treated up to four times in a single visit.
Its core is a specialty liquid called PFD (Perfluorodecalin).

After a laser pass, white “frosting” microbubbles appear on the skin surface. These scatter light and greatly reduce the effectiveness of subsequent passes.
Traditionally, you’d wait many minutes for frosting to subside (often incompletely) or postpone to a future session.

With topical PFD, frosting clears in seconds, allowing the next pass within 1–2 minutes. This enables multiple effective passes in one appointment and can reduce total treatment time while still achieving meaningful pigment clearance.

Evidence

Biesman et al., 2013
Patients treated with an R0 approach achieved a ~30–50% reduction in total sessions versus conventional spacing, demonstrating the feasibility of immediate repeat passes.

Kauvar et al., 2020
With roughly three R0 sessions (≈ ~10 total laser passes), many cases reached ~70–90% pigment clearance, with low rates of adverse effects such as PIH (post-inflammatory hyperpigmentation).

(Study details summarized for patient education.)

Then why do we perform “three” passes, not four?

Although R0 allows up to four passes, in real clinical practice 2–3 passes are most common. Reasons:

1. Asian skin characteristics
   Fitzpatrick III–IV skin types have higher melanocyte reactivity and a greater risk of PIH. Excessive repeats can raise irritation and PIH risk beyond the benefit of further pigment break-up.

2. Safety balance
   Within three passes, we can check skin response and proceed safely. Beyond that, risks of erythema, pain, micro-burns, and normal-tissue injury rise disproportionately.

3. Diminishing returns
   Even with PFD, the amount of reachable pigment per visit is finite. After ~three effective passes, incremental clearance drops, while side-effect risk climbs if you simply increase energy.

Bottom line: “Up to four” is a technical ceiling; the optimal number for real-world safety and efficacy is often three.
At KKEUT Clinic, we prioritize skin safety and results—three passes is our default principle unless individualized assessment suggests otherwise.

Why doesn’t every clinic offer R0?

• PFD is costly and not always easy to source.

• Correct timing and dosing with pass-by-pass design requires experienced clinicians.

• A single visit can take 2–3× longer than a standard session.

High-throughput clinics may avoid R0 for these reasons.
At KKEUT, we value completion quality and reducing patient burden, so we consider R0’s efficiency worth the investment.

The KKEUT Approach

We avoid over-treatment and repeat passes only as needed, aiming for the maximum clearance your skin can safely tolerate that day.
Our priorities are faster overall clearance, fewer total visits, greater safety, and cleaner results.

Faster. Fewer. Safer. More complete.