1 For a thinner stitch, less material is woven together.  Elasticity - Stitches on your knee need to be more elastic than those on your forearm, because your knee must be able to bend. Without proper elasticity, the stitches can snap and come out, or even tear the wound and delay healing.
1 Through the 1950s and 1960s, the use of exterior lead-based paint declined significantly, and ended by the early 1970s. 2  In 1971, the federal Lead Poisoning Prevention Act was passed.  In 1978, the federal government banned consumer uses of lead paint.
Some states have adopted this or similar definitions of lead-based paint. These definitions are used to enforce regulations that apply to certain activities conducted in housing constructed prior to 1978, such as abatement, or the permanent elimination of a lead-based paint hazard.