Abstract: The present disclosure refers to monitoring a printing fluid, in an example, a device is disclosed wherein the device N comprises a light emitter to illuminate a fluid line comprising a flowing printing fluid; an image sensor to capture a diagnostic image of the fluid line once it has been illuminated; and a processor connected to the detector being the processor to compare the diagnostic image to a baseline and to determine a printing fluid quality parameter based on the comparison.

Abstract: An example retaining device includes a retaining feature to retain an article, and a first arm. The first arm projects in a first direction and includes a first protrusion extending away from a first face of the first arm. The first protrusion is to engage another article to retain the retaining device relative to the other article. The first arm includes a second protrusion spaced apart from the first protrusion and extending away from the first face of the first arm. The width of the second protrusion increases in the first direction so as to provide a sloped surface.

Abstract: Certain examples described herein relate to liquid waste containers delimiting an opening for receiving liquid. The liquid waste container comprises a receptacle for liquid waste and a bistable arrangement having first and second stable states such that when the bistable arrangement is in the first stable state, liquid can be received into the receptacle through the opening, and when the bistable arrangement is in the second stable state, liquid is prevented from exiting the receptacle through the opening. The example liquid waste container further comprises an actuator arranged to engage the bistable arrangement and to cause the bistable arrangement to transition from the first stable state to the second stable state.

Abstract: An example retaining device comprises a retaining feature to retain an article, and a first arm. The first arm projects in a first direction and comprises a first protrusion extending away from a first face of the first arm. The first protrusion is to engage another article to retain the retaining device relative to the other article. The first arm comprises a second protrusion spaced apart from the first protrusion and extending away from the first face of the first arm. The width of the second protrusion increases in the first direction so as to provide a sloped surface.

Abstract: In an example there is provided a method for electro-magnetically shielding a circuit board assembly. The method comprises depositing a solder material at multiple locations on a substrate, heating the solder material according to a predetermined thermal profile and coupling an enclosure to the substrate at the locations to provide an electromagnetic shielding for components attached to the substrate. The locations are arranged on the substrate such that a size of a largest aperture of the circuit board assembly is below a pre-determined threshold size value.