Abstract: An arrangement for dispensing color paste, a shading apparatus, a method, a computer program product, and a memory. The arrangement includes a piston pump including a feed channel. The feed channel is provided with a substantially different amount of color paste per travelling length unit when the piston is moving towards the first end of the cylinder than when the piston is moving towards the second end of the cylinder. The arrangement further includes a valve connected to the feed channel, a dispensing channel connected to a first outlet channel of the valve for conveying color paste into a can, and a by-pass feed channel connected to a second outlet channel of the valve for conveying color paste past the can for the paint to be shaded.

Abstract: An arrangement for dispensing colour paste, a shading apparatus, a method, a computer program product, and a memory means. The arrangement comprises a piston pump comprising a dispensing channel. The dispensing channel is provided with a substantially different amount of colour paste per travelling length unit when the piston is moving towards the first end of the cylinder than when the piston is moving towards the second end of the cylinder. The arrangement further comprises a valve connected to a dispensing channel. The valve has a dispensing channel connected to a first outlet channel of the valve for conveying colour paste into a can and a by-pass feed channel connected to a second outlet channel of the valve For conveying colour paste past the can for the paste to be shaded.