The leaf then becomes the printing plate. Leaves can be printed to suggest traditional block designs or used in allover patterns, bands, circles, etc. When heat set, the prints are permanent on cloth. Or collect leaves on a trip. Then try printing with other things from nature to personalize quilts . . .
Students bring photo negatives of any size to expose to sunlight.
Or do photograms, using leaves, flowers, scissors, paper cut-outs, etc. It helps to do a demonstration initially, so students can see what they will be working with. Then hold a planning session to determine an initial project. After they have experienced the process, plan blocks for a quilt or parts of a garment. The fabric will be totally unique in a beautiful deep blue.