78 votes

What is the code for the rings stamped on the top of canned food?

There’s no hidden code in the rings, they are just there to stabilize the thin metal. A flat sheet is weaker and more flexible than one with ridges - the same reason why roof and wall metal is usually ...
Stephie's user avatar
  • 59.6k
30 votes

How can I tell if a broth carton with a twist cap is sealed?

Give it a slight squeeze. If it’s letting air out, you’ll be able to continuously squeeze until liquid comes out. If it is sealed it will resist further squeezing after only a slight squeeze. ...
Eliot G York's user avatar
28 votes

What is the code for the rings stamped on the top of canned food?

While it is absolutely correct that the beads and panels in a can end add strength and rigidity, there can be encoded information stamped into the can ends, but it's probably not what you're thinking ...
gnicko's user avatar
  • 1,067
18 votes
Accepted

What is the padding with red substance inside of steak packaging?

That "padding" is an absorbent pad made of paper and plastic; the "red substance" inside is the juices (often mistakenly believed to be "blood") that have seeped out of the meat; the purpose of the ...
Allison C's user avatar
  • 594
16 votes
Accepted

How safe and durable is commercial meat packaging when exposed to alkaline and acidic marinades?

Low and high density polyethylene (PE) and polypropylene (PP) are the two common plastics used in food packaging and food storage containers. Your Ziploc/Rubbermaid etc. containers and bags are ...
borkymcfood's user avatar
  • 5,361
15 votes
Accepted

How can I tell if a broth carton with a twist cap is sealed?

After several edits to incorporate suggestions from comments [now gone] The thing to take away from this answer is that the seal itelf is not the primary indicator of tampering. Because there are many ...
Tetsujin's user avatar
  • 29.7k
13 votes
Accepted

Swollen meat packages (modified atmosphere packaging)

Now you've punctured it you don't have a week. It was packaged in a protective atmosphere, & you've broken the seal… not to mention, of course, that if it was continuing to increase in pressure, a ...
Tetsujin's user avatar
  • 29.7k
11 votes

Mousse de Canard, Mousse de Foie, Terrine de Campagne, expired by around 10 days

I'm sorry to say that your three packages are no longer safe for consumption. Expiry dates are usually pretty conservative and food may still be good several days past them, but the concerning factor ...
Kareen's user avatar
  • 722
10 votes

Gases used in packaging food?

CO2 is carbon dioxide and N2 is Nitrogen gas. In either case, this is referred to as "Modified atmosphere packaging", which means the food is packaged in something other than simply "...
Catija's user avatar
  • 16.5k
9 votes
Accepted

What are Chicken Paws?

There actually seems to be a difference between a chicken paw and a chicken foot. According to a 23-page publication from the University of Pennsylvania: Chicken Feet = feet and shank Chicken Paws = ...
Sue Saddest Farewell TGO GL's user avatar
9 votes
Accepted

What are certified synthetic colors?

The FDA recognizes 9. Here's how they put it on their official website: Certified colors are synthetically produced (or human-made) and used widely because they impart an intense, uniform color, are ...
Jolenealaska's user avatar
  • 58.5k
9 votes
Accepted

Why is there a sheet of paper in packages of minced meat?

The paper isn't for you. It's for the robots. Packaged ground meat like that is ground, portioned, and packaged automatically. The blocks of ground meat are formed by extruding them into an endless ...
Sneftel's user avatar
  • 29.2k
7 votes
Accepted

Refrigerate after opening, but why?

The canning process makes food safe: existing bacteria and fungi are killed, the intrusion of new pathogens is prevented by sealing the container. (More e.g. here.) As soon as you open the can or jar,...
Stephie's user avatar
  • 59.6k
6 votes

Why are holes punched into rice packages?

The holes let the bags breathe, so they can be compressed without popping, and packed more densely. Spoiling and spreading bugs aren't generally huge issues. Rice doesn't really spoil or go stale or ...
Cascabel's user avatar
  • 58.2k
6 votes
Accepted

Tetrapaks vs. canned food

It depends on the damage to its layers. This is the layout of a tetrapak container: Now, obviously the container should not be considered safe if layers 1-3 are compromised. But small damage in ...
Pablo Oliva's user avatar
6 votes

how to store rice for 12 hours so it doesn't dry out

For eating rice cold, I find it best to cool it by rinsing with cold water as soon as it's cooked. Then drain well, pack into a close fitting container, and refrigerate. It also works well if you plan ...
Chris H's user avatar
  • 44.1k
6 votes

Why does industrially produced tagliatelle come in nests?

When making egg pasta at home if it's not used right away it's common to flour slightly and wrap into nests to dry. This is a simple and effective way to do dry your pasta without it hanging over ...
myklbykl's user avatar
  • 5,084
6 votes

Why is there a sheet of paper in packages of minced meat?

Can't tell from the picture, but in many places the "paper" is actually absorbent. It collects any juices, keeping things looking neat and tidy.
moscafj's user avatar
  • 75k
6 votes
Accepted

Why does spinach come in an airtight bag?

The airtight bag has an atmosphere of mostly nitrogen. This displaces the oxygen in regular air, which in itself prevents decay but also reduces the moisture content which further prevents decay. ...
dbmag9's user avatar
  • 12.1k
5 votes

how to store rice for 12 hours so it doesn't dry out

I have a sister-in-law who has gluten intolerance, so she travels with plastic storage bags with rice in them, in case she arrives at a destination or airport where non-wheat convenience foods are not ...
PoloHoleSet's user avatar
  • 3,634
5 votes
Accepted

Can one prepare yogurt in sealed glass jars?

Short answer: No. More detailed answer: strictly yes, you can seal it, but it is useless for any purpose, and specifically, it won't preserve your yogurt. Yogurt is not preservable at home, in any way....
rumtscho's user avatar
  • 139k
4 votes

Refrigerate after opening, but why?

In addition to Stephie's safety answer, there is another reason: Many foods undergo undesirable flavor or texture changes due to reacting with the oxygen in the air (oxidation), losing or gaining ...
derobert's user avatar
  • 13.2k
4 votes

How safe and durable is commercial meat packaging when exposed to alkaline and acidic marinades?

I'm not quite clear about what you mean, but food packaging is generally deemed safe. If you are suggesting cutting the bag open, adding a marinade, and refrigerating in the bag within the typical ...
moscafj's user avatar
  • 75k
3 votes

how to store rice for 12 hours so it doesn't dry out

At our home we regularly eat leftover cold rice the next day with breakfast or lunch. The trick is to be sure that it is not exposed to air and not refrigerated. We leave it in the pot that it was ...
squidlydeux's user avatar
3 votes

Why are holes punched into rice packages?

The bags are less likely to burst when the air can move in and out of them. Last thing you want is a bunch of bags to pop during shipping.
R. Richards's user avatar
3 votes

Reuse of Food Grade Tins

Different types of tins are intended for storing different types of foods (dry crackers are very different from cheeses that contain some moisture). And as mentioned previously, linings can chip when ...
wombar's user avatar
  • 146
3 votes

Ice Cream Bar Wrapping Machine Suggestions?

There are many food grade presized "Cello"/"Cellophane" bags. They all use more modern plastics, but are continued to be called "Cello". Here is one that has an adhesive ...
Zak's user avatar
  • 318
3 votes

Lyle's Golden Syrup tin design, why is it like this and how to clean it

The same issue exists with paint cans: the trough in the rim fills up with paint. Solution there: bang two or three nail holes in the trough so the paint can drain back into the can. The lid will ...
Stephanie's user avatar
3 votes

Why is butter usually labeled "Sweet Cream"?

My paternal Grandmother (who lived in the mountains of North Carolina), had only one milk cow. Every morning and evening my Uncle would milk this cow. My Grandmother would skim off the cream and put ...
Debny's user avatar
  • 31
3 votes

How can I package durian flesh so that its fragrance cannot be detected?

I would recon you´d need a glass or metal container, as aroma-molecules can diffuse though plastic. This is basically the same Problem users of certain "herbs" have, so naturally there is a lot of ...
Daniel's user avatar
  • 244

Only top scored, non community-wiki answers of a minimum length are eligible