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Nas Naran lime juice manufacture (Practical Action Brief)

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Nas naran is a variety of lime which has a less sharp flavour than most other varieties, making it a more refreshing drink. The skin of the fruit has a glossy and dimpled appearance.

Recipe[edit]

Juice 14%
Sugar 12%
Water 74%
Preservative: Sodium metabisulphate 230ppm. (0.023%) (70ppm SO²)
Colouring A few drops of green food dye if necessary

Method[edit]

Wash whole fruits and discard any fruit which is bad.

Cut the fruits in half and squeeze out the juice by hand or with a squeezer (this can be two grooved wooden rollers). Separate the seeds from the juice by squeezing through muslin cloth.

Mix the sugar with the water and filter the solution through a muslin cloth. (Sugar often contains a lot of dirt and foreign bodies.) Heat the sugar syrup to 95°C then add the Nas Naran juice, heat the mixture to 90°C, add the preservative, heat all the ingredients at 90°C for 1 minute. Then start the filling operation maintaining the temperature of the juice at 90°C.

Hot fill the juice into bottles which have been cleaned and then steamed to sterilise them, and are still hot so they do not crack when hot juice comes in contact with them. The bottles should be filled as quickly as possible so that the juice is not heated for longer than necessary, or recontaminated because it has cooled down before being sealed in the bottle. The lip of the bottle should be clean and dry (wipe with clean tissue paper) before placing the cap on it. Lay the bottles on their side to cool for 15 minutes. This is a most important step to avoid contamination while the cap fits firmly down onto the glass lip as the vacuum forms.

Equipment list[edit]

  • Bottles, crown caps and labels
  • Crown capping machine
  • Cooking facilities, gas ring, electric ring, etc
  • Stainless steel saucepan
  • Thermometer in protective jacket
  • Stainless steel cutting knife and spoon
  • Wooden spoon for stirring
  • Steam generator/Cutting board/Scales
  • Measuring cylinder/Funnel
  • Liquidiser/Muslin

Reference and Further Reading[edit]

Lime Oil and Juice, (Practical Action Technical Brief)
Mixed Fruit Juice Manufacture, Practical Action Technical Brief
Fruit Juice Processing, Practical Action Technical Brief
Small-scale Production of Ready-to-drink Pineapple Juice, Food Chain No27 Oct. 2000