Opacity
In addition to the light will lead to the deterioration of the food reactions can also cause changes in protein and amino acids. Vitamin C by making it easier to light the role with other food ingredients, resulting in a huge loss. According to the research analysis showed transparent glass bottles of milk, vitamin C losses dark bottled milk higher than 14 times, the light also causes oxidation of milk smell, as well as the loss of nutritional value nuclides, such as cracking methionine, tinplate cans opacity makes the highest rates of vitamin C saved.
Good sealing
Packaging containers is very important barrier to air and other volatile gases preservation of nutrients and sensory quality. Comparison of various fruit juices proof containers, container oxygen transmission rate directly affects the preservation of juice browning and vitamin C; oxygen through the low metal cans, glass bottles and plastic laminated aluminum foil, paper preservation of vitamin C well, among the best cans.
Reduction of tin
Tin tin filled with the inner wall will remain in the role of oxygen in the container, reduce the chance of food ingredients to be oxidized. Reduction of tin on the pale fruit juice flavor and color have a good preservation effect, and therefore do not use canned juice cans painted iron than other packaging materials juice cans filled with better nutrition preservation, brown slight change, acceptance flavor quality is better, and thus extend the storage period.