Explain in detail of the principle of the processing of mix fruit jellies from pineapple, orange, lemon and gelatin.
Processing mix fruit jellies involves a series of steps that combine the principles of extraction, heating, boiling, and setting to create the final product. When using pineapple, orange, lemon, and gelatin, the following steps are commonly followed:
1. Preparation of fruits: The fruits (pineapple, orange, and lemon) are first washed and peeled. They are then cut into small, uniform pieces to ensure even distribution in the jelly.
2. Extraction of juice: The fruits are then crushed or juiced to extract their natural juice. This can be done using a juicer or by hand. The juice is typically sieved to remove any pulp or seeds.
3. Mixing with gelatin: Gelatin is a protein derived from animal collagen that provides the texture and structure to the jelly. It is mixed with water and allowed to bloom, or absorb water, before being heated to dissolve completely. The fruit juice is then added to the gelatin mixture and stirred to combine.
4. Heating: The fruit juice-gelatin mixture is heated gently to activate the gelatin and ensure it is completely dissolved. It is important to heat the mixture slowly and not let it boil, as boiling can break down the gelatin and affect the final texture of the jelly.
5. Boiling: Once the gelatin is dissolved, the mixture is brought to a boil. Boiling helps to thicken the mixture and remove any excess moisture, creating a concentrated jelly.
6. Setting: After boiling, the mixture is poured into molds or trays and left to cool and set. The mixture will solidify as the gelatin cools and forms a jelly-like consistency.
7. Cooling and packaging: Once the jelly has set, it is left to cool completely before being unmolded or cut into individual portions. The jellies are then packaged in airtight containers to preserve freshness.
Overall, the principle of processing mix fruit jellies from pineapple, orange, lemon, and gelatin involves combining fruit juice with gelatin, heating, boiling, and setting to create a delicious and vibrant treat. The key to a successful jelly is ensuring the gelatin is properly dissolved and the mixture is heated and boiled gently to achieve the desired texture and consistency.