Chemical products in this class, including colouring substances for measuring and controlling instruments for registration of temperature, pressure, tension, and electric current, and including colouring substances for lettering, printing and colouring on sensitive plates, films, X-ray films,diapositive slides and copies on paper; dyes for manufacturing pastes for ball point pens and dye stuffs for manufacturing dyes for pastes for ball point pens; colouring substances and pigments for manufacturing light - resistant, washable, ageing -, and wipe - resistant colours, and inks, and Indian inks, and writing pastes for writing, drawing, printing, stamping, letter-franking, for colour ribbons and for registering instruments, and such colours, inks, and writing pastes themselves, colours, and colour-pastes for ball-point pens and drawing brushes; Dipping and marking lacquers for pencil fillings, Marking Lacquers, protective coating lacquers, and colours for fillings for ball-point pens