Most varicose and spider veins appear in the legs due to the pressure of body weight, force of gravity, and task of carrying blood from the bottom of the body up to the heart. Compared with other veins in the body, leg veins have the toughest job of carrying blood back to the heart. They endure the most pressure.
Curing a thermosetting resin transforms it into a plastic, or elastomer by crosslinking or chain extension through the formation of covalent bonds between individual chains of the polymer. Crosslink density varies depending on the monomer or prepolymer mix, and the mechanism of crosslinking:
If primer is applied correctly, it does not damage the nail bed. Curing techniques: Slower curing time. Acrylic liquid and powder are applied to the nail and the acrylic nails. Faster curing time. Most gel nails are cured under uv-light; some cure with a gel activator and do not require uv-light (no-light gels). After effects