Write in ink, not with ink

Write in ink, not with ink

Don’t Say:
I’ve written the letter with ink.

Say:
I’ve written the letter in ink.

Note:
We use in when we are referring to the final work. The drawing was done in charcoal Dora writes her letters in green ink. When we are referring id the instrumeni used we use with The children are learning to write with a pen Helen prefers to paint with a thin brush.