The invention relates to a composition for the oxidation dyeing of keratin fibers, in particular human keratin fibers and more particularly the hair, comprising, in a medium that is suitable for dyeing, at least one oxidation dye, characterized in that it comprises more than 5% by weight of the composition of at least one oxyethylenated rapeseed fatty acid amide. The other end is attached to a flexible elongate element wound on a drum which is part of a speed control means. The shield system can be used on horizontally storing dock levelers or vertically storing ones.