It might damage the bench, but it is far more likely that a crucible on a lab bench and not on the ring or the asbestos pad will be mistaken by someone, possible someone other than the immediate experimenter, for a cold crucible and picked up to a detrimental effect.
When a crucible has been fired it is incredibly hot so the two most sensible reasons for using crucible tongs is firstly to prevent the users' hands from being burnt and secondly to prevent the bench in the laboratory from becoming damaged or burnt.
Adding water rapidly to a hot crucible might cause the crucible to brake.
the crucible might be hot hence it is handy
Manipulation of hot crucibles to avoid burns and contamination of the crucible.
A pot that hot enough to meth the metals.
Because fingerprints can add a considerable mass to the crucible when weighing it.
Adding water rapidly to a hot crucible can cause a violent steam explosion due to the rapid conversion of water into steam. This can lead to splashing of hot material, potential burns, and damage to the crucible and surroundings. It is important to add water slowly to prevent this dangerous situation.
Crucible tongs are huge forceps that are used to hold a hot crucible and remove it from the furnace. Crucible tongs are made from steel that can stand high temperature.
Hot as fire
Tongs should be used to handle a cooled crucible and lid to prevent burns or injury from residual heat. Fingers are not insulated against heat like tongs are, and using them to handle a hot crucible can result in burns. Tongs provide a safe and secure grip on the crucible and allow for better control when moving it.
Crucible tongs are made up of aluminum that used for moving the crucibleswhen they are still hot to cool it down.
A crucible must be cold before weighing to ensure accurate measurements. If a hot crucible is weighed, it can cause air currents and thermal convection that affect the scale's reading, leading to an inaccurate measurement of the crucible's weight. Additionally, weighing a hot crucible can risk damaging the balance or scale. Lastly, cooling the crucible allows for any residual materials to settle, providing a more precise weight.