3.1. Colour profile
The CIEL⁄a⁄b⁄ and CIELCH colour characteristics varied significantly for all pretreatment concentration in UBF of all cultivars except for Luvhele UBF were there was no significant difference in the a⁄ values across all organic pretreatment and varying pretreatment concentration (Table 1). L⁄ values of all UBF pretreated with lactic acid was significantly higher (p < 0.05) than flours pretreated with other organic acid. UBF for all non-commercial banana cultivars also recorded significantly low a⁄ values for lactic acid pretreatment across all concentrations. Recorded low a⁄ and high L⁄ values in all pretreated UBF can be attributed to the antibrowning effects of organic acid pretreatment. Organic acid pretreatment helps prevent antibrowning discolouration of foods which leads to unpleasant and undesirable colour characteristics. Colour stability and maintenance of pink and red colouration of pork and beef have been reported by the action of dip treatment in ascorbic and citric acid solutions (Huang, Ho, & McMillin, 2005). Similar reports was also shown by De Souza, O’Hare, Durigan and de Souza (2006) on the effect of organic acid on sliced fresh fruits, with results of analysis suggesting that colour of sliced mango cultivars were