Abstract: A solid paste dispenser and a slider for use therewith that enable the effective use of solid paste for sticking purposes by reducing any paste remaining unused, while not damaging a paper or like surface. The solid paste dispenser has a slider holding a stick of solid paste thereon, and the slider can be raised and lowered in a cylindrical body by its threaded engagement with a screw rod forming an integral part of a tail plug attached to one end of the cylindrical body so that the solid paste may have a distal end free to protrude from the cylindrical body and retract thereinto. The slider has a plate portion and a cylindrical portion projecting from the center of the plate portion on its side holding the solid paste thereon, and the screw rod extends through the cylindrical portion in a threadedly engaged relation therewith.

Abstract: A slider for a solid paste dispenser has a planar base portion and a tubular portion projecting from the center of the base portion into a solid paste. A screw rod extends through the base and tubular portions and is engaged therewith in threaded manner, and the tubular portion has as an integral part thereof a radially outwardly extending protrusion or a number of such protrusions so formed as to satisfy the equation S0?SM?S1+S2+ . . . +Sn where S0 stands for the area (cm2) of the upper surface of the base portion, S1 to Sn each stand for the area (cm2) of the lower surface of one of the n protrusions, and SM stands for a maximum area (cm2) of S1 to Sn in which each of S0 and S1 to Sn excludes the area occupied by the tubular portion.

Abstract: A multi-color writing instrument such as a ballpoint pen or mechanical pencil, which is adapted such that a selection of a writing color can be easily performed even under poor lighting conditions and/or by a person with poor eyesight. The writing instrument includes a plurality of reservoir tubes containing different writing colors, which are accommodated in a barrel. Operating portions are provided on the reservoir tubes and exposed outside the barrel. The operating portions can be differentiated from each other by touch. Thereby a specific one of the reservoir tubes can be selected by the operating portions for use.