finally...
i have done with bow...
finished and ready to ship. next week, i will be shipping it.
BTW:
my formula to write on bow etc.
materials needed.
1. gouache (white)
2. white (opaque) wood glue
3. water
put little amount of gouache in to pod and mix it with little amount of water until it dissolves completely.
then put some wood glue and mix it again.
with dip pen you can write permanently.
this method was used in permanent black indian and chinese inks in history. i just converted a little. they were using resin instead of glue and ashes for black powder.
maybe this information can be useful to someone :D