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.
Tantamount to firming up your body through exercise, you can firm up your face and smooth out wrinkles by exercising your facial muscles. Surgical face lifts and chemical injections are expensive, painful and dangerous, where face exercises are free and easy, and you can do them in the comforts of your own home.