After many years of making Mixed Media collages, I have my favorite materials for adding black lines to my work. I draw with Sharpie pens (or other similar markers) of all sizes as well as my fat chunky crayon which is sacred in my studio. It is important to vary the size of the drawing tip when creating an interesting piece. Often time, I find that when I grab my really thick Sharpie pen or even a really thin one, the contrast in size and density of the mark is just what the piece needed. The painted paper shown is what I will then tear into smaller pieces to compose a new collage. Remember, water soluable products will smear if you are not careful with what other products you are using. Also, add chalk pastels as the last step when drawing into your work because they too smear.