Abstract: The present invention is directed to a shear-thinning gel composition for producing a dry, water-stable and electronically conductive ink, comprising (a) dispersed electrically conductive graphite flake particles and (b) at least one further type of electronically conductive particles selected from carbon black and conductive pyrolyzed plant carbon components in a specific ratio of (a) to (b) as well as (c) a dissolved binder based on or consisting of shellac dissolved in a suitable solvent, where-in the ratio of the total of the electrically conductive particles (a)+(b) and the dissolved binder (c) and the weight proportion of the electrically conductive particles in the composition are specified.

Abstract: A bin-like arrangement with a mesh near its bottom collects dust from near the doctor blade of a Yankee cylinder in a paper making machine; a trough-like arrangement having a sloping bottom at the lower end of the bin receives the dust, and a plurality of horizontal air jets are provided at different heights at different points along the trough to entrain and remove the accumulated dust, preferably through a suction outlet. The system greatly reduces the dust released to the adjacent environment, without interfering with normal doctor blade operation, and without interfering with normal handling of the separated paper.