Wow, Sudsman, a lot of variables to consider...
Don’t know if this is enough information to go on, but see what you can come up with.
For this scenario, let’s assume we’re talking about 80% cotton bath towels, Martex brand, commercial grade, used 2 to 3 times between laundering.
Available water temp. 130-140 degrees.
18 lb. FL with 3 possible main wash times: 25, 21 or 13 mins. The main wash cycle can be manually repeated to add additional baths. 3 possible rinses, 2 mins. each, with the option of manually adding more.
Electric Tumbler. Current drying time on 6 full sets of bath linen is about 15 mins.
The color content is strictly white.
City water supply, not unusually hard, but no additional water softening.
Products available:
For this application, let’s assume dry bleach with 9% available chlorine.
Powdered detergent with a blend of alkalinity and detergency, intermediate quality ($32 for 50 lbs.) It’s not Ecolab. Moderate alkalinity; no heavy duty breaks. And a softener/neutralizer.
The machine will be operating with the normal recommended load. Gees, I don’t own enough linen to overload it.. LOL
Desired quality is bright white, fluffy, clean-smelling bath linen with a pH level that’s comfortable to the skin. Sterilization is not a necessity.
Turn-around time is not a factor.
No ironing. So the scorching issue is not a factor. They would come from the dryer, get folded and put on the shelf.
Not looking for an exact formula; just something to start with. Or, some guidelines for coming up with my own formula. I could always go to the supermarket and pick up a box of All-Temperature Cheer and some Snuggle, but then doing the laundry wouldn’t be any fun. Besides, this is all so much more interesting.