Are Air Tight Ice Cream Scoops Also Water Tight?

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The discussion centers on testing new prototypes of ice cream scoops designed to be airtight and potentially watertight. The manufacturer is exploring how to seal the handles effectively and is currently testing them by filling the handles with air and submerging them in water to check for leaks. It is suggested that the air pressure inside the handle should exceed the external water pressure to ensure that any leaks would produce visible bubbles. The goal is to determine the necessary PSI to guarantee watertight integrity if the prototypes can hold air without leaking. Effective sealing is crucial for the functionality and durability of the ice cream scoops.
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I work for a company that manufactures ice cream scoops. We are trying to come up with a new way of sealing our fluid into the handles of the scoops. As we are getting new prototypes of a new sealing device, it has been given to me the task of testing these prototypes. I have been putting the prototypes in, I then fill the handles of the scoops up with air and place the scoops underwater to see if they will leak. My question is, if the new prototypes leak air, will they be watertight. How many PSI of air should it be able to hold in order for the scoop to be watertight? Any help would be very much appreciated!
 
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If you are filling it with air and then putting them in water, then I would start with enough aire pressure to ensure that whatever water pressure is outside the handle doesn't collapse the handle. Since you are looking for leaks, you would need some pressure higher than the water so as to produce bubbles if there is a leak.
 

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