Abstract
The supply of quality milk to consumption centres has failed to meet the requirements. Spoilage, refrigeration and distribution costs of milk are the major problems of the dairy industry. Due to lack of centralized organization of milk collection, processing and distribution, manufacturing dairy products of extended shelf. life appears to be the best solution for overcoming milk spoilage during storage. Manufacturing milk powder involves the appli. cation of appropriate treatments to obtain adequate storage stabi. lity. Reconatitutability teats indicated better dispersibilityin low beat pretreatment of milk powder. Packing in polythyIene lined heat sealable aluminium foil bags showed superior quality as regards overall reconstitutability of spray dried milk after 4 months at ambient temperature (25-35°C).
INTRODUCTION
Milk powder manufactured in Pakistan is mostly marketed in polye-thylene bags for economic reasons. Off•flavour development and degradation properties relating to reconstitutability of products thus mIrketed have apt-lighted the need for devising such processing cb.lng39 that could yield flavour stability with good and easy reconstitutability of dried milk, Maximum solubility of self-disp3rsiou could b3 obtained only with milk powder having bulk density of less thin 0.4 g m1-1. (Harper et al., 1963). High }.eat application during processing can cause irreversible denatura. Lion of casein which ultimately affeot8 the dispersibility of dry milk. Further-more, the rate of solugbiIity index is directly correlated to the time, temperature and moisture content of the dry milk during storage (Hall and Hedrick, 1966). Dried whole milk packed at temperature above the melting point of at and
*Food Technology Department, University of Agriculture, Faisalabad.
