Jessica's colorful and detailed artworks are made in watercolor and colored pencils. Sometimes she uses gouache, a more opaque type of watercolor paint. On more rare occassions she is working in acrylics.

The brand of watercolor paint is Winsor & Newton, and the pencils are Derwents, which are used after the painting is finished for highlighting chosen areas and to deepen shadows and sharpening up details.

Jessica uses a Swedish brand of watercolorpaper, with a very fine grain that responds well to small detail painting.