Seborrhea or seborrheic dermatitis is a skin disorder in which the sebaceous glands of the skin produce an excessive amount of sebum. Seborrhea typically affects the back, face and flanks causing scaly, flaky, itchy, red skin.
Desoldering braid, also known as desoldering wick or solder wick, is finely braided 18 to 42 AWG copper wire coated with rosin flux, usually supplied on a roll. The end of a length of braid is placed over the soldered connections of a component being removed.
Soft soldering uses very low melting temperature solder alloys, usually of tin and lead, and is not commonly used in fine jewelry. Solder is a nonferrous (without iron) metal alloy, the major percentage of which is usually the same as the metal being joined: gold, silver, copper, or brass.