The initial artwork is titled Japanese Bamboo Painting. The second piece is known as Degas Portraits à La Bourse. Both are executed using a single brush stroke technique. However, the first utilizes ink, while the second employs oil.... I hope this provides some clarity for you.....
Image 1: This artwork exemplifies vine charcoal. The medium for vine charcoal is created by incinerating plant materials like bamboo to different textures. Image 2: This represents a chalk drawing. Made from finely crushed minerals and fossilized shells combined with a gum or resin, chalk is a soft, calcium-based drawing medium.