Hi! I don't make or use masks at this time and I don't know what lemon power is like. So I am totally shooting an arrow in the dark but I know that I have read up on for lemon that even with soap they suggest that you don't use Lemon EO with anything with your face because of the way it can react. Here are some details on lemon: How does Lemon work? • Antiseptic - Inhibits the growth of microorganisms such as bacteria or fungi. • Antidepressant - Helps uplift mood • Anti-nausea – reduces nausea • Astringent - Contracts, firms, and strengthens skin and other tissue; reduces secretions. • Circulatory Stimulant – helps to increase blood circulation • *Photosensitizing, phototoxic - May cause a skin reaction such as burning, irritation, or pigment change upon exposure to ultra-violet light (sunlight, tanning lights) • Tonic - Increases tone and vitality of skin, other organs or body systems Maybe this helps???