Tuesday, November 3, 2009

Purple Agar-agar Preparation


1. Dissolve one packet of Bites Agar Agar Powder (Jelly powder) and 250gm of fine sugar together and mix well.


2. Pour the mixture into 1 litre of cool water. Stir and bring to boil over low heat until mixure is dissolved.

3. Pour in feel drops of the clarified colourant which extracted from purple cabbage just now into mould.

4. Put mould into the refrigerator for 1 hour and serve chilled.



From the picture above, we can see that 22 has darker colour compared to 31. 22 is natural colorant, anthocyanin, while 31 is artificial colourant. The darker colour in natural colourant might be caused by degradation while boiling, which is undesirable. On the other hand, artificial colourant is more heat-stable and can withstand the temperature rise during boiling, hence, there is no colour changes in it. However, we can boil the agar solution in shorter period to minimise degradation of natural colourant. So that, the colour will be more attractive.

No comments:

Post a Comment