A hand dipped into a washtub, permitting washing by hand only.
A washtub with a hand in it restricts the garment to hand washing. In the ISO system it carries an implied temperature limit of about 40°C, which the symbol itself does not state.
In the ISO 3758 system a hand in the washtub restricts the garment to hand washing, excluding machine processes.
Contexts: Laundry
The temperature limit that goes with it is part of the standard rather than part of the drawing, which is why the symbol alone does not tell a reader how hot the water may be.
Contexts: Laundry
An open-topped vessel with sloping sides, a wavy line across its opening, and a hand reaching down into it from above.
Both are built from objects, and both are used in laundry contexts.