The effect of storage temperature on the quality and formation of blooming defects in chocolate confectionery


  • Lenka Machálková Mendel university in Brno, Faculty of Agronomy, Department of Food Technology, Zemedelska 1, 613 00 Brno
  • Luděk Hřivna Mendel university in Brno, Faculty of Agronomy, Department of Food Technology, Zemedelska 1, 613 00 Brno
  • Šárka Nedomová Mendel university in Brno, Faculty of Agronomy, Department of Food Technology, Zemedelska 1, 613 00 Brno
  • Miroslav Jůzl Mendel university in Brno, Faculty of Agronomy, Department of Food Technology, Zemedelska 1, 613 00 Brno



chocolate, storage temperature, blooming, colour, hardness


The study aimed at assessing changes in the quality of certain types of chocolate products over the storage period with particular focus on the formation and development of fat and sugar bloom in chocolate products. Seven products were selected in collaboration with a chocolate factory to undergo monitoring and analysis and stored at four temperature regimens (6 °C, 12 °C, 20 °C and 30 °C). Five samplings were carried out over the storing period (18 weeks) for evaluation of the dynamics of changes in their quality. Each sampling was accompanied by sensory evaluation; selected physical attributes were also analysed: changes in colour (∆E*ab) within the CIE (L*a*b) system and changes in hardness using the TIRAtest 27025. The results showed a significant effect of storing temperature on the intensity of changes in the quality of products. The results of sensory evaluation of selected products showed that the highest quality for the majority of descriptors was achieved by products stored at temperatures of 6 °C and 12 °C. As regards samples stored under the temperature regimen of 20 °C, the products started to show visible differences, caused primarily by the formation of fat bloom while storing at 30 °C proved to be extremely unsuitable for all the tested products. Since storing temperatures of 6, 12 and 20 °C did not considerably affect hardness and colour of each product, no distinct changes occurred under such temperature regimens. From the aspect of analytical measurements of colour and hardness of each product, storing at temperatures of 20 °C can be termed appropriate. In all the analyses, the effect of the temperature regimen of 30 °C was significantly negative due to defects caused by blooms on the chocolate, meaning that such temperatures are not advisable for storing chocolate products, even over a short term.


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Adenier, H., Chaveron, H., Ollivon, M. 1993. Mechanism of fat bloom development on chocolate, Shelf life studies of foods and beverages, Chemical, Biological, Physical and Nutritional Aspects, G. Charalambous (ed.) Elsevier Sciences Publishers, BV p. 353-386.

Afoakwa, E. O., 2010, Chocolate Science and Technology, Times by Aptara Inc., 275 p. ISBN 978-1-4051-9906-3.

Afoakwa, E. O., Paterson, A., Fowler, M., Vieira, J. 2008. Effects of tempering and fat crystallisation behaviour on microstructure, mechanical properties and appearance in dark chocolate systems, Journal of Food Engineering,

vol. 89, no. 2, p. 128-136.

Afoakwa, E. O., Paterson, A., Fowler, M., Vieira, J. 2009. Fat bloom development and structure-appearance relationships during storage of under-tempered dark chocolates, Journal of Food Engineering, vol. 91, no. 4, p. 571-581.

Ali, A., Selamat, J., Che Man, Y. B., Suria, A. M. 2001. Effect of storage temperature on texture, polymorphic structure, bloom formation and sensory attributes of filled dark chocolate, Food Chemistry, vol. 72, p. 491-497.

Beckett, S. 2008. The Science of Chocolate, 2nd ed., Cambridge: The Royal Society of Chemistry, 240 p. ISBN: 978-0-85404-970-7

Briones, V., Aguilera, J. M. 2005. Image analysis of changes in surface color of chocolate, Food Research International, vol. 38, p. 87-94.

Briones, V., Aguilera, J. M., Brown, CH. 2006. Effect of surface topography on color and gloss of chocolate samples, Journal of Food Engineering, vol. 77, p. 776-783.

Bui, L. T. T., Coad, R. 2014. Military ration chocolate: The effect of simulated tropical storage on sensory quality, structure and bloom formativ, Food Chemistry vol. 160, p. 365-370.

Čopíková, J. 1999. Technologie čokolády a cukrovinek, (Technology of chocolate and confectionery) Praha VŠCHT, 1st ed., 168 p., ISBN 80-7080-365-7.

Hartel, R., W. 1999. Chocolate: Fat Bloom During Storage, The Manufacturing Confectioner, vol. 79, no. 5, p. 89-99.

Jinap, S., Ali, A., Man, Y., Suria, A. 2000. Use of palm mid-fraction in dark chocolate as base filling center at different storage temperatures, International Journal of Food Science and Nutrition, vol. 51, no. 6, p. 489-499.

Kumara, B., Jinap, S., Man, Y. B., Yusoff, M. S. A. 2003. Comparison of colour techniques to measure chocolate fat bloom, Food Science and Technology International, vol. 9, p. 295-299.

Mexis, S. F., Badeka, A. V., Riganakos, K. A., Kontominas, M. G. 2010. Effect of active and modified atmosphere packaging on quality retention of dark chocolate with hazelnuts, Innovative Food Science and Emerging Technologies, vol. 11, no. 1, p. 177-186.

McCarthy, M. J., Reid, D. S., Wei, D. 2003. Fat bloom in chocolate: New directions in research, The Manufacturing Confectioner, vol. 83, no. 9, p. 89-93.

Nattress, L. A., Ziegler, G. R., Hollender, R., Peterson, D. G. 2004. Influence of hazelnut paste on the sensory properties and shelf-life of dark chocolate, Journal of Sensory Studies, vol. 19, no. 2, p. 133-148.

Nöbel, S., Böhme, B., Schneider, Y., Rohm, H. 2009. Technofunctional barrier layers for preventing fat bloom in triple-shot pralinek, Food Research International, vol. 42, no. 1, p. 69-75.

Rašper, V. 1963. Technologie čokolády a cukrovinek, (Technology of chocolate and confectionery) Praha, VŠCHT, 276 p.

Sonwai, S., Rousseau, D. 2010. Controlling fat bloom formativ in chocolate – Impact of milk fat on microstructure and fat phase crystallisation, Food Chemistry, vol. 119, no. 1, p. 286-297.

Svanberg, L., Ahrné, L., Lorén, N., Windhab, E. 2011. Effect of pre-crystallization process and solid particle addition on cocoa butter crystallization and resulting microstructure in chocolate model systems, Procedia Food Science, vol. 1,

p. 1910-1917.

Timms, R. E. 1984. Phase behavior of fats and their mixtures, Progress Lipid Research, vol. 2, p. 1-38.

Třešňák, K. 1999. Barvy a barevné modely (Colors and color models), Svět tisku, vol. 6, p. 58-60.

Wacquez, J. 1975. Fat Migration into enrobing chocolate, Manufacturing Confectionery, vol. 55, p. 19-23.

Wootton, M., Weeden, D., Munk, N. 1970. Mechanism of fat migration in chocolate enrobed goods, Chemical Industry, vol. 32, p. 1052-1053.

Ziegleder, G. 1997. Fat migration and bloom, The Manufacturing Confectioner, vol. 77, p. 43-44.




How to Cite

Machálková, L. ., Hřivna, L. ., Nedomová, Šárka ., & Jůzl, M. . (2015). The effect of storage temperature on the quality and formation of blooming defects in chocolate confectionery. Potravinarstvo Slovak Journal of Food Sciences, 9(1), 39–47.

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