Visible filth: wash until the material substance is removed. Any extremely difficult residual stain is assessed separately.
Invisible filth: wash until purification is reasonably certain.
The two methods differ because visible filth can be checked for removal directly while invisible filth requires a supported judgment.
Opening interactive controls...
Types of Impurity and Methods of Purification
Visible filth: wash until the material substance is removed. Any extremely difficult residual stain is assessed separately.
Invisible filth: wash until purification is reasonably certain.
The two methods differ because visible filth can be checked for removal directly while invisible filth requires a supported judgment.