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.
How to thicken thin skin There are a variety of prescription and proprietary formulations that are directed toward increasing the collagen content, hence the tickness of the skin. Retinnol (vitamin A) and tretinoin (Retin A) are effective although irritating off of the face. and can only be used periodically except on the face.