Turning a batch into a product
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Fix the number first
Decide what density you finish at and write it down. For a concentrated syrup that number is partly chosen for you by the standard of identity and by any state rule above it; for a formulated one you are choosing it, and it governs how long the product keeps. Either way it stops being a judgment the moment you decide to sell.
Then fix the bottle
The bottle decides the net quantity on the label, the panel the label has to fit, and whether a hot fill is even possible. Changing it later changes all three. For a hot-packed syrup it also narrows the choice sharply, because most of what is on the shelf for pourable food is PET and a hot fill rules PET out.
Then the label, and not before
Net quantity comes from the bottle and the fill. The statement of identity depends on whether you hit the density. Labels ordered before those are settled are labels reprinted, and the reprint always costs more than the wait did.
What stops being optional
- A recorded density reading for every batch, with the instrument and the temperature.
- A batch code that connects a bottle on a shelf to the day it was made.
- A formulation in weights rather than volumes, so somebody else can make it.
- Somewhere legal to make it, which is a different question from whether you may sell it.
The part that catches people
Home practice finishes a syrup when it looks right and adjusts to taste. Production finishes to a measured number and does not adjust, because the number is what the label claims. That is a change in how you work rather than a change in the recipe, and it is the one people underestimate.
Decide the shelf life and be able to defend it
A date on a label is a claim. For a concentrated syrup at a proper density it is a conservative one; for a formulated syrup it is the claim most likely to be wrong, because the keeping quality follows a concentration you chose. Decide it from the measurement rather than from what the competition prints, and hold stock back to check it.