Grate Fels-Naptha Soap.
In a large pot add the grated soap and a couple inches of water. Heat on low until all the soap is dissolved.
Add 1/2 cup Borax and one cup Super Washing Soda.
Add some extra hot water and stir.
Pour the mixture into a bucket. I use a five gallon pail.
Fill the bucket with hot water. Stirring the mixture a few times.
I add orange oil for fragrance, about 20-25 drops.
Let the mixture sit overnight. It will solidify and little and become kind of "gloppy". I use between 1/4 to 1/2 cup per load of laundry.
I enjoy making this laundry soap, and it is very economical and cheap to use. It is fragrance free, unless you add the essential oil of course, and it is non-sudsing, so it is great for front loading washing machines. Overall this works very well. I will spot treat heavily soiled or stained areas before washing items.