Estimate how many laser tattoo removal sessions you need. Uses the Kirby-Desai scoring model across 6 clinical factors: skin type, location, ink colour, density, scarring, and cover-up status.
"In over 25 years in the body art industry, the question I hear most from people in regret isn't 'how much does removal cost?' — it's 'how long will it actually take?' The Kirby-Desai model is the closest thing the removal field has to a clinical standard. I built this so you can go into your first consultation with realistic expectations rather than the optimistic nonsense that some clinics sell to get you in the door."
Founder & Piercing Expert
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</iframe>The number of laser tattoo removal sessions varies enormously based on clinical factors. The Kirby-Desai model quantifies six of the most predictive variables: Fitzpatrick skin type (fair skin responds faster), anatomical location (extremities remove slower than trunk), ink colour (black removes fastest; green and yellow are the most resistant), ink density (lightly applied designs respond in fewer sessions than heavily packed work), the presence of scarring or tissue change, and whether the design was placed over a pre-existing tattoo (cover-up). A simple, single-colour black tattoo on a Type II patient may clear in 4–6 sessions. A densely saturated multicolour tattoo on darker skin, especially on a foot or finger, may require 15 or more sessions with 6–8 week intervals — meaning years of treatment.
Laser tattoo removal works by targeting specific chromophores — molecules that absorb specific wavelengths of light. A Q-switched Nd:YAG at 1064 nm is highly efficient at shattering carbon-based black pigments. Green and yellow pigments require entirely different wavelengths (532 nm for red absorption complements green; 532 nm struggles with yellow). These pigments are also often formulated with synthetic organic dyes that fragment into persistent sub-particles rather than clearing cleanly. The result is that green, yellow, and fluorescent colours require more passes, often with specialised laser platforms (alexandrite at 755 nm is more effective on blue-green pigments), and frequently never clear to 100% — which is why honest removal practitioners discuss these limitations upfront.
The Kirby-Desai scale was published in the Journal of Clinical and Aesthetic Dermatology in 2009 as a validated tool for predicting the number of laser tattoo removal treatments required to achieve significant clearance. The scale assigns a numerical score across six variables — skin type (1–5), location (1–5), ink colour (1–4), ink amount (1–4), scarring (0–3), and cover-up status (0 or 4). A cumulative score below 4 suggests 1–3 sessions; scores above 15 indicate 10 or more sessions are likely required. While no predictive model is perfectly accurate — individual immune response and laser platform type introduce variance — the Kirby-Desai scale remains the most clinically grounded framework available for setting patient expectations before commencing treatment.
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