1.Non- pervious to the light

Shine can make food unhealthy and change protein and amino acid.Vitamin will lose so much if put under shine and have chemical reaction with other ingredient. There are report says, containing milk in glass bottle is lose 14 times vitamin C when in high color bottle. Shine make milk oxidized which has a peculiar smell, at the same time, it schizolysis nuclide and methionine so that reduce the milk nutrition.After all, tin cans non-pervious to light keep a higher rate of vitamin C then other cans.

2.Good sealing ability

Package cans play an important role in keep the air and other volatility air out of the food and keep a good condition in nutrition and sensory quality. Compare with every kinds cans of fruit juice, tell us the cans OTR direct influence the fruit juice have brown stain reaction and vitamin C quantity. A lower OTR can which including tin can, glass bottle, aluminum foil and paper box keep a high rate of vitamin C, while tin can is the lowest OTR in them.

3.Tin’s reducibility

 Tin will oxidized with the vestigital oxygen, so that reduce the food be oxidized. Tin’s reducibility keep the light color fruit, juice’s style and color in a good condition. So containing juice with imprinting tin cans keep the juice not go bad and reduce the brown stain reaction. Keep the health juice a longer life.

4.Supply available tin

Tin can usually prints internal to improving the corrosion preventive.except some light color fruit and juice.For metal itself electrochemistry ability, the internal be printed can will have little Fe digest which exist nearly 1-10 ppm ferrous in sealing food, this is easy absorb by human body. Referred fruit and vegetable themselves don’t contain much Fe. For example, drink tin can contains 350 ml liquid which have 1.75 mg ferrous (Account the ferrous 5ppm) is take out 10% our body daily need ferrous. If the fruit and vegetable juice have enough vitamin C, the ferrous will more easily for us to absorbing. So drink tin can has a well ability of supplying available tin.

For the referred futures, tin cans give us a full sealing environment except hot so that keep the food out of shine, oxygen, wet and fragrance which break the food smell. The tin cans is the best package material which keep a high rate vitamin C so that keep the food high protein.