Solder can be shiny or dull depending on the type and composition. Lead-based solders tend to have a shiny appearance, while lead-free solders can appear duller. Additionally, the surface finish of solder joints can influence their shine, with properly formed joints typically having a shiny appearance.
dull
Dull?
No, cotton is typically a dull fabric and not shiny in appearance.
Slate is typically dull in appearance. It has a matte finish and does not have a shiny or reflective surface.
Tellurium has a shiny luster.
To identify a cold solder joint on your guitar, look for a dull or grainy appearance on the solder connection. To fix it, reheat the joint with a soldering iron until the solder flows smoothly and forms a shiny, solid connection.
dull
dull
shiny
It is shiny.
Shiny
High purity must be shiny, but if oxidized it will become dull
It could be dull or shiny. It doesn't matter.
Dull?
Iron is not beautiful but dull is an exaggerated word.
Movement. The components being soldered need to be fixed, stable, and clean to allow the solder joint to solidify and adhere properly. Movement of components will cause a 'dry' joint which will be electrically unreliable and have a dull appearance.
shiny