Q: Recipes?
A:
Sulfur with Coal Washing : in chemical plant, 3 sec, 5 coal, 50 water = 1 sulfur, 3 coal
Sulfur with Coal Washing (expensive): in chemical plant, 3 sec, 5 coal, 50 water = 1 sulfur, 2 coal

Plastic Bar with Sulfur : in chemical plant, 5 sec, 3 sulfur, 30 steam, 1 plastic bar = 2 plastic bar
Plastic Bar with Sulfur (expensive) : in chemical plant, 5 sec, 5 sulfur, 30 steam, 1 plastic bar = 2 plastic bar

Q: does recipes allow productivity modules?
A: yes, they should.