The trays to make clear ice usually have a compartment that’s sacrificial (where the non-clear part of the ice goes and is cut off) from what I’ve seen.
Yeah, there’s no better way than directional freezing. Either you freeze big old slabs in a way that pushes the dissolved gases (and many dissolved solids) away from the crystal structure of slowly freezing ice and then cut it after the fact, or you directionally freeze something that has an outlet to push the gases down so that you pull the frozen ice from the top compartment before the bottom compartment freezes.
The trays to make clear ice usually have a compartment that’s sacrificial (where the non-clear part of the ice goes and is cut off) from what I’ve seen.
Yeah, there’s no better way than directional freezing. Either you freeze big old slabs in a way that pushes the dissolved gases (and many dissolved solids) away from the crystal structure of slowly freezing ice and then cut it after the fact, or you directionally freeze something that has an outlet to push the gases down so that you pull the frozen ice from the top compartment before the bottom compartment freezes.