Larger | Spin | 3D. Indium foil. Indium is often used to form air-tight seals between glass components because it is soft enough to mold itself to the shape of the glass, and because unlike rubber or other organic seal materials it is really 100% gas-tight and it doesn't release volatile compounds of its own.
Melasma is a chronic skin disorder that results in symmetrical, blotchy, brownish facial pigmentation. It can lead to considerable embarrassment and distress. This form of facial pigmentation is sometimes called chloasma, but as this means green skin, the term melasma (brown skin) is preferred.
There are various ways in which to treat facial melasma. Laser skin resurfacing and chemical peels have risks involved. With laser treatments, scaring can occur as well as pigment loss where facial melasma is treated. Chemical peels can cause an allergic reaction. Stronger peels can make your skin burn or peel. Swelling or redness can occur from partial laser treatment, but is not permanent.