Blocks & Bulk Formats
Chocolate supplied as solid 5 kg blocks rather than callets. Lower cost per kilogram, less surface area exposed to air in storage, and no loss to the bottom of a bag.
The trade-off is handling: you chop before you melt, and portioning means cutting rather than weighing. Blocks make sense when you melt 3 kg or more at a time or run a tempering machine. For seed tempering and frequent small batches, callets are the better format.