mugs noise

[jennywren]

I have just put a mug in water and there was a loud crack, can't see anything wrong with the mug, would it be wise and do another and put that one in the bin

[Andrew]

You could try pouring boiling water into it to see if it leaks. Cracks expand under that type of heat but obviously contract when cold. We've been caught out with that before when a mug looks perfectly fine to the eye and leaked when making coffee.

[jennywren]

What a great idea, and how simple many thanks, maybe it could in the tip section.

[gstk]

we stopped dunking over a year ago as we had too many of those noises. The thought of a mug cracking and spilling the contents over a customer was too frightening. We let cool naturally and doesnt take long.

[jennywren]

I always use a fan but as there was only two mug I was lazy and use the water method. Won't do that again in a hurry. I used hot water and nothing once again many thanks for that

[Justin]

Are you ensuring water is at least room temp?

[Ian M]

I always use warm water & never have a problem.

[Paul]

when i used water and heard a noise of crack mug goes stright in the bin! i dont want to end up in court when mug goes in bits when full of hot fluids :/
Also when I heard a crack and keept the mug I notice crack line after few uses. specialy when tea left some color stain. then yo can see the crack very clearly.
in the bin i say.

[jennywren]

Are you ensuring water is at least room temp?

Maybe n,ot as it is cold I didn't run the tap long. Still it back to the fan

[Andrew]

From my experience it tends to be different mug supplies that do it. Some will dip in cold water with no problem whilst others you nearly always get a ping noise when contracting.