The fresh aluminium foil we received is the model for freshness, and there is also a frozen model, which differs in thickness. This time we mainly review is this fresh aluminium titanium foil. The outer packaging is a long strip of colourful cardboard box, looks more delicate, tear open the box and the same as conventional aluminum foil can be used, the inner layer of the box also has a paper serration, much better than the traditional plastic wrap steel serration.
When the aluminium foil arrived, I found that it was much thinner and softer than the usual barbecue aluminium foil, i.e. tinfoil. Using a micrometer to measure its thickness, the thickness of aluminium titanium foil is about 0.006mm, compared to the general tinfoil, the thickness is 0.012mm. this thickness and metal strength is not suitable for heating and cooking, if not used properly or easy to break, the official recommendation is to be used for preservation of freshness, it is not recommended to be used for grilling and heating. And aluminium titanium foil on the food parcel also has some requirements, food on the harder part to remove before wrapping, otherwise aluminium titanium foil may appear broken.
However, the whole wrapping experience is not bad, although it does not have a strong adhesion like PE cling film, but it can also completely fit the ingredients, and it is very convenient to use.
Fresh Rui up official claim that aluminium titanium foil compared to ordinary PE cling film can extend the preservation time of the ingredients, that actually still have to run a try. Although there is no refrigerator inside the studio, but still for this test specifically to get a refrigerator to. Incidentally, this refrigerator is a second-hand refrigerator from a classmate, when we first got it, there was a lot of smell in the freezer, although it has been put in a few days, but we had to put some deodorant in the refrigerator, which may slightly affect the smell of the food, but it does not affect the final conclusion. We prepared two kinds of vegetables and one kind of fruit, namely green vegetables, lettuce and watermelon, and let the aluminium foil and PE cling film do the comparison, meanwhile, there was a group without any wrapping material as the control group, the watermelon was cut into two halves, so it was not possible to prepare three portions, so there was no control group. All vegetables and fruits were wrapped on the same day of purchase.
The watermelon was wrapped overnight and taken out the next day, the appearance looked similar, there was no obvious change, but the watermelon under the PE film could obviously smell the smell in the refrigerator, that is, the string of smell, while the watermelon wrapped in aluminium and titanium foil did not have any smell at all, at least I couldn't smell it, which means that the aluminium and titanium foil has a very good effect of isolating the odour. Of course, although the smell is obvious, but the audience can not personally smell, so we also use some instruments to assist the detection of some other characteristics of the aluminium titanium foil, such as this ATP rapid fluorescence detector, the instrument's manual is said: "Since all living cells contain a constant amount of ATP, so the ATP content can clearly indicate the sample in the sample. The amount of microbial and other biological residues is used to determine hygiene."
The unit of detection of this tester is the RLU Relative Light Unit and does not quantify the surface of the object being measured in absolute terms, so the data we get when using this tester to test the surface of food can only be compared using the difference, not directly comparing the data.
Since the watermelon is everything in two, I personally think it's sort of controlling for the variables, so I measured the RLU value once before the package, which was 30519, and then I'm now doing a second test.
As the watermelon was everything in two, I personally think it sort of controls for the variables, so the RLU value was measured once before parceling and was 30519, and then a second test is now carried out. Also going on at the same time were the vegetables, before parceling we did a quick ATP test on the vegetables using a swab, and then after leaving them for 2 days took them out and tested them again. Let's look at the lettuce first, before putting it into the refrigerator, the RLU values of lettuce were 13731 for PE wrap and 13626 for aluminium-titanium foil, and after taking it out, the values were 15567 for PE wrap and 13731 for aluminium-titanium foil; and the RLU values of bok choy before putting it into the refrigerator were 5796 for PE wrap and 4182 for aluminium-titanium foil, and after taking it out, the values were 12096 for PE wrap and 8772 for aluminium-titanium foil. At the same time, the unwrapped lettuce had already lost more water softly, the exterior of the lettuce wrapped with PE cling film had already experienced some softening and water loss, and some of the external leaf ends had turned yellow, while the lettuce wrapped with aluminium and titanium foils was relatively fresh, with basically no yellowing of the leaves, and the stems were still relatively crunchy; the bok choy was in a similar situation, with the exterior of the unwrapped lettuce having lost water, the exterior of the wrapped PE cling film having lost water, the wrapped PE cling film having lost water, the wrapped PE cling film having lost water, the wrapped PE cling film having lost water, the wrapped PE cling film having lost water. The situation is similar for bok choy, the unwrapped external leaves have lost their moisture, the wrapped PE cling film is still relatively fresh, only that the external leaves have a yellowing of one leaf, and the wrapped aluminium and titanium foil bok choy is still very green, with no loss of water or yellowing, and it is still relatively fresh.
It seems that the effect of preservation of freshness is indeed there, can probably extend a day or two this way. And the official provided a report issued by the standard technical services (Shanghai) Co., Ltd, the report shows that the test of the aluminium titanium foil samples on the antibacterial rate of Escherichia coli more than 99.9%, on the antimicrobial rate of Staphylococcus aureus reached 99.1%, indicating that the product is still have a certain antimicrobial effect.
If you need to freeze, this frozen aluminium titanium foil also has a good effect, we cut two pieces of pork about the same size in the refrigerator after a period of time out of the freezer, the use of thermocouple thermometer attached to the surface of the package for 20 minutes to observe the thawing speed, you can see that the aluminium titanium foil wrapped pork, the temperature in the beginning of the higher than the plastic wrap wrapped, because of its relatively good thermal conductivity, the temperature can be quickly At the same time, the aluminium foil side of the liquefaction of the formation of water droplets is relatively more, at this time to use the hand to pinch the pork, aluminium and titanium foil side of the pork is relatively softer, the effect of heat conduction is indeed better.
As the test took a long time to prepare, we just moved office, the site is not yet set up, the test environment is relatively simple, not a professional laboratory environment, the test results are only for your simple reference. Aluminium titanium foil can isolate air by closely fitting the surface of the food, to a certain extent, inhibit the growth of bacteria, the preservation effect is indeed better than ordinary cling film, but still need to pay attention to the food, especially vegetables, itself is still not recommended to keep too long. In addition to the refrigerator things or to fast in and out, so that the refrigerator will be less odour.
Of course the fresh pistil of aluminium titanium foil can also be in the preservation of food and ingredients, to a certain extent, to avoid the string of smell, so that the refrigerator smell will not be so bad, the smell of the ingredients themselves can be well preserved. In addition, aluminium foil is relatively safe and healthy compared to plastic cling film, according to the official manufacturer, the test report issued by the Guangzhou branch of the Standards Technical Services Co., Ltd, the aluminium foil samples sent to the test did not detect any plasticisers in the composition, can be considered relatively safe.
As for the most concerned about the price, the current double eleven promotional price is 2 boxes of 45 yuan, each box is 30cm * 30m, discount 0.75 yuan / m, ordinary PE cling film is 2 boxes of 28.7 yuan, each box of 30cm * 100m, discount 0.14 yuan / m, there is indeed a certain price gap, but during the epidemic, in case you are unfortunate enough to be blocked by the community, with the fresh pistil of the fresh! Aluminium titanium foil, can let the food put a period of time, this small amount of money I think is still acceptable.
Finally summed up the fresh Rui up fresh aluminium titanium foil, the advantages of one, the material is thin, soft, plasticity is good, fit the ingredients package convenient; second, there is a certain antimicrobial effect, to a certain extent, can extend the preservation time of food, so that the ingredients are relatively hygienic and fresh; third, the effect of the isolation of the smell is good, to prevent the cascade of flavour. However, compared with PE cling film, it is easy to break, need to dry the water before wrapping and remove the hard part; in addition, the price is really more expensive than cling film. Of course, in the current epidemic, food preservation, it is always good to have one more day.
