Is there a difference between parchment paper for writing on and the type you use in cooking? I have tried searching this question many different ways but to no avail. My instinct and common sense say the processing is probably exactly the same but I would like to be sure.
Parchment paper for cooking is coated with silicone.  Therefore, most traditional writing implements would not even be able to leave a permanent mark on it.

In addition to the coating, at least one brand says it uses additional manufacturing steps to strengthen its cooking parchment paper:


  A spokesperson for Reynolds Consumer Products, says that the company’s
  parchment paper is pressed into a sheet, then dipped into an acid
  bath, washed, and “passed over a series of hot rotating drums that
  realign the fibers and give the paper its strength,” before the
  silicone coating is applied.