Table 1. Determination of pork quality classes

Pork quality class	pH24h	Drip loss (%)	L* value
PSE pork	< 6.0	≥ 5	≥ 50
RSE pork	< 6.0	≥ 5	42–50
RFN pork	< 6.0	2–5	42–50
PFN pork	< 6.0	2–5	≥ 50
DFD pork	≥ 6.0	≤ 2	< 42

PSE, pale, soft, exudative; RSE, reddish-pink, soft, exudative; RFN, red, firm, non-exudative; PFN, pale, firm, non-exudative; DFD, dark, firm, dry.