While One Does Love Pure Soap For Laundering
And one should having enough types and in quanity to start a small general store, using soap for wash day bit by bit is essentially waterproofing one's laundry.
Just as with the tallow/fat fabric softeners of old soap does leave some residue which does not rinse out. Several hot and or very warm water rinses in soft water will remove a bulk of it, but traces still remain. This is the "built in fabric softener" affect many soap makers marketed their products as in direct competition to laundry detergents.
And one should having enough types and in quanity to start a small general store, using soap for wash day bit by bit is essentially waterproofing one's laundry.
Just as with the tallow/fat fabric softeners of old soap does leave some residue which does not rinse out. Several hot and or very warm water rinses in soft water will remove a bulk of it, but traces still remain. This is the "built in fabric softener" affect many soap makers marketed their products as in direct competition to laundry detergents.