Air Soluble Marking Pen - Hmmmm

      I started early this morning trying to knock out a few of those microwave bowl cozies that seem to be in fashion these days.  I had cut out my fabric and special batting last night, and just had to do some straight sewing. 
      After the fabric and batting are sewn together, the next step is sewing the tucks (which turn it from a flat piece to a bowl shape).  The instructions I was using suggested using an air or water soluble pen to mark the sewing lines.
     I happened to have just received an air AND water soluble pen as part of a gift.   I carefully folded, measured, and  marked two pink lines on each of 8 pieces.
     I don't (yet) have a dedicated sewing room, so my cutting table and iron are currently in the basement, and my sewing machine is in the living room.
     By the time I got up the stairs from the cutting table to the sewing machine, the lines had disappeared!  Air soluble it is indeed!  I am sure there is a great use for this little notion, but right now, I am not sure what it is!   Not a disaster, since these are pretty easy to do just at the machine, but a good lesson learned.   

The marked corner.  

     

The bowls awaiting the next step! 

        Hope to get these finished tomorrow!   
Take care,
Gretchen