Par-frying is a partial frying step applied to blanched potato strips before freezing, which sets the crust, develops initial colour and reduces end-user preparation time, with oil type and uptake level forming part of the product specification.
In trade practice
Oil temperature and belt speed are controlled to achieve the target colour grade and oil uptake within the contracted range. The oil type used in par-frying must be declared on the label and in trade documentation, as it affects allergen status and nutritional profile. Processors monitor oil quality continuously, since degraded frying oil transfers off-flavours and affects colour consistency. Buyers specify a reference colour chart grade and conduct test fries on retained samples to verify conformance.
In a specification
Specifications state the oil type permitted for par-frying, the maximum oil uptake as a percentage of product weight, and the colour grade range measured against a defined reference scale after a standardised finish-fry.