I've heard and seen religious Jews painting the backs of the tefillin straps black, and they claim a kabbalistic reason somewhere in the Schulchan Auruch. Does anyone know anything about this, the ...
Is there a problem with wearing tefillin whose paint has started to chip off? Would such a situation require one to get the tefillin repainted? Can someone still be yotzei by tefillin whose paint is ...
When painting tefillin, are there any requirements regarding the ink (other than the need to be black)? Or is any ink okay to use? Like in the comments to this answer, shoe polish is recommended. Is ...
What are some suggestions for keeping the Tefiliin Retzuos black? How can I prevent the Retzuos from needing to be painted and/or replaced?