Thinking of getting the Mesoestetic COSMELAN treatment pack to apply at home. How long I need to keep the mask on for? (photo)

Please, could you tell how long I need to keep the mask on for... I am of Indian and Caribbean decent so quite tanned. I recently had the 30% TCA peel done for hyperpigmentation on my upper lips which looks like Hitler's moustache developed 2 years back. Did not do anything for it. In the past, I also had some glycolic peels.