Artificial methods Edit. For crystallization (see also recrystallization) to occur from a solution it must be supersaturated. This means that the solution has to contain more solute entities (molecules or ions) dissolved than it would contain under the equilibrium (saturated solution).
Yep, good old water will instantly tighten your skin if it is cold enough. Fill a basin with half ice and half water. Submerge your face for about 10 seconds and pat dry. You skin will take on a pink hue and your pores will be closed. You can also use this trick to dry nail polish instantly.
Newer non-surgical technology helps tighten the skin by focusing controlled radiofrequency energy on the deeper layers of the skin. This warming of the tissue stimulates collagen growth at the level which causes tighter firmer skin. The device and technology can be used to tighten the face/jawline/neck area as well as contour areas of the body such as the arms, upper thighs, knees, and abdomen.