Is one allowed to wash for challah if on their hands are printed numbers, pictures, letters.
"צביעה באוכלים" (coloring in foods) - the stringent view of some poskim
Understanding the Concept of Something That Was Attached to the Ground or a Tree Going into Shabbos and Then Became Detached on Shabbos (Muktzeh);
Some Important Examples Which Sometimes Come Up and to Be Aware of;