OhLook wrote in post #18130510
Interesting. I always like to see how things are done BTS. Does this device function without putting visible fumes into the shot?
Yes...the fan just blows air over the dry ice so what comes out the end is simply cold air. Any 'fumes' from the dry ice dissipate (evaporate?) quickly.The old school way of doing this is to hold a colander filled with dry ice directly over the scoop and let the cold air cascade down. And while that works reasonably well, any air movement in the room (strobes/air conditioner) has pretty large affect on that falling air. This gun provides a bit of 'force' from the fan to keep it concentrated on the scoop.
And to provide a little sense of the scale of the project coming up from just a logistics point of view: I need to accommodate about 250 1/2 gallon containers of ice cream in freezer space. It gets complicated because it needs to be in the freezers for a few days at -5° in order to temper, so I can't shuttle it between different places. I currently have 3 stand alone freezers as well as 2 that are part of refrigerators but suspect that i need to have more and I'm wishing my math skills were better in trying to figure out exactly how many cubic feet of storage the product requires.
Here's a scoop that's being worked on in the cold box...a styrofoam box packed with dry ice on sides and above, with a hinged door. Work a little, close the door to re-freeze...repeat.
please log in to view hosted photos in full size.