Writing, drawing, painting and modelling utensils; mechanical pens, signing and marking pens; pencils, color pencils and copying pens as well as replacement cartridges for these; propelling pencils; ball point pens, refills, felt and fiber pens plus refills; chalks for drawing and artists; devices for the application of writing, marking and highlighting liquids; correction fluids and devices for writing, drawing, painting and signing; auxiliary and operational devices for overhead projectors for visual applications such as transparent films in sheets and as webs for writing with special pens, specially coated films for copiers, correcting devices for films; cases, pouches, tins, plastic containers, metal containers, glass containers, paper and cardboard packaging for transport, keeping, presenting or use of writing utensils; writing boards, films for boards for writing with special fiber pens; teaching aids (except apparatus) to the extent included in class 16

Magnesium oxide