When I worked in a kitchen with white cotton aprons and polyester/cotton, I could send them to installation laundry with any and every kind of food stain one can imagine. They ALWAYS got them out. I ALWAYS got my whites back gleaming.
They say you can't get the strength of soap they use because it is too caustic. I'm sure they didn't use a chlorine bleach too, because chlorine eats cotton over time.
Does anyone know where to get the soap they use, perhaps through another avenue? My whites are on my freaking nerves! :-@