The German-engineered Quadrostar Pro Yellow Laser is an improved version of the commonly used Dual Yellow / Combination laser. Due to its special wavelength of 577nm, the ProYellow laser represents the gold standard for vascular treatments and epidermal pigmentation treatments.

“Glass Skin Laser” – The Pro Yellow Laser Difference

The yellow laser has been dubbed the “Glass Skin Laser” due to its efficacy in achieving bright, glowy skin. In addition, the ProYellow also helps to reduce pigmentation, reduce redness, treat acne conditions, and reduce red facial veins.

The main difference between the ProYellow laser and other skin rejuvenation lasers is its unique wavelength. Compared to its predecessor, the DualYellow/Combination laser, the ProYellow laser has a specific wavelength of just 577nm, instead of a mixture of 532nm (green) and 577nm (pure yellow light).

visible light wave length for lasers

This specific wavelength of 577 nm means that the ProYellow Laser can be used to safely treat various conditions such as pigmentation, rosacea, red acne marks, uneven skin tone etc, as the wavelength of 532nm is believed to leave Asian skin more susceptible to hyper-pigmentation. 

pro yellow laser target

“The majority of visible unwanted skin spots, discolorations or redness (blood vessels), are rooted in a deeper vascular network of veins that that extend beyond the treatable depth of traditional green (532nm) lasers. Not addressing these areas can result in recurrence and the inability to effectively treat deeper pigmented and vascular issues.”

The ProYellow laser, because of its ability to reduce vascular (blood vessels and redness) conditions, also helps to prevent pigmentation and prolong laser results after clearance of pigmentation.

What is it used for, and how does the Pro Yellow Laser work?

Retinal Physician - Clinical Experience With Multispot Yellow 577 ...

From the laser absorption graph above, the 577nm wavelength of the ProYellow laser is effectively absorbed by both melanin (pigmentation) and oxyhaemoglobin (blood vessels).

Therefore, the ProYellow laser can treat both pigmentation issues, and other conditions that causes redness such as facial veins, rosacea, and acne problems.


Where possible, pigmentation problems should always be treated by a multi-modal approach. This means combining pigmentation solutions such as topical creams, medication, and different lasers for best results.

This is because most pigmentation problems involve different types of pigmentation and each is treated by different laser settings. 

The ProYellow laser, with the 577nm wavelength, treats mainly epidermal pigmentation. Common epidermal pigmentation includes:

  • Freckles
  • Sun spots
  • Age spots
  • Melasma (epidermal type)
  • Café au lait birthmarks

The energy from the Pro Yellow laser is absorbed by both melanin (pigments) and the underlying blood vessels. This results in breakdown of pigments and at the same time, reduces the blood supply to the skin cells that produce these pigments. This will prevent these skin cells from producing pigments and ensure longer-lasting results.

Vascular Conditions

Vascular conditions cause redness and flushing on the face. This is due to the dilation of small superficial blood vessels in the skin. They can appear as red spots, or visible threads on the skin.

The Pro Yellow laser can treat vascular conditions such as:

  • Facial/nose veins and blood vessels 
  • Redness and rosacea 
  • Cherry angiomas, Telangiectasia, etc.

The ProYellow laser effectively shrinks or completely eliminates these blood vessels, resulting in reduced redness and a more even complexion.


The yellow light energy from the ProYellow laser treats acne caused by P.acne bacteria by killing these bacteria. At the same time, it also reduces redness caused by inflammation and shrink sebaceous glands that produce sebum (oil).

Red acne marks, also known as PIE (Post- inflammatory Erythema), form due to increased blood circulation at badly-inflamed acne. This marks are redness that persist even after the acne heals. The ProYellow laser can very effectively reduce these red marks by reducing the blood vessels in these areas.

Skin brightening aka Glass skin

‘Glass skin’ is a term made popular by Korean doctors and celebrities.

It was coined as ‘glass skin’ as the treatment achieves a glow that makes the skin look smooth and bright. The ProYellow laser is a treatment that is responsible for the ‘glass skin’ effect. 

The ProYellow laser achieves the ‘glass skin’ effect by:

  • instantly brightening the skin due to the effect of the yellow light energy
  • Heat energy from the laser gets absorbed into the skin dermis and improves the skin’s collagen structure
  • Reduces redness for an even skin tone
  • Reduces imperfections such as pigmentations

The ‘glass skin’ results are more obvious in patients with less oily skin/acne-prone skin. This is because oily skin tend to absorb less of the laser energy.

Frequently Asked Questions about Yellow Laser

Is there any downtime?

For pigmentation treatment, some pigments will look darker initially right after the treatment. This is the ‘end point’ that doctors will look to achieve so as to remove the pigments effectively. This slight ‘darkening’ of the pigments usually last 3-7 and is not obvious. In some cases, such as freckles or sun spots, some scabbing might be needed to remove the pigments. The scabbing usually falls off after 3 – 4 days.

For removal of red veins and red acne marks, flushed skin will be expected due to the heat. Flushing will last from 2 – 24 hours and gradually subside. 

‘Glass skin’ protocols usually has no downtime except for slight pinkish skin for 15-30mins. 

What should I do before and after the treatment?

Avoid strong sun exposure for at least 1 week both BEFORE and AFTER the ProYellow laser. Avoid scrubbing and exfoliation for 1 week after the procedure if there is any scabbing.