It should tell you in the instructions. I just finished one with grid lines and all the stamped bits disappeared as soon as I gave it a gentle wash. My instructions said to make sure you don't get the aida wet until you have finished. i'm very happy with the results.
Enjoy your cross stitching 
Alphabetical Girls' and Boys' Names Oct '25
Word pairs. New game 9th November
What colour car do you have or did you used to drive?


