What is food wrap made of?

Well, until 2004, saran wrap was made from polyvinylidene chloride. However, S.C Johnson decided to change the formula to LDPE (low densite polyethylene) in 2004 because they had concerns about the effect of the chloride on the environment. How do I know this? Because I sell saran doll hair. Yep, it's made from polyvinylidene chloride (not LDPE), and it's what most Barbie dolls are rooted with. Tina from www.dollyhair.com