http://housewares.about.com/od/kitchenwareaccessories/f/ststeel_RO.htm
Found on the web the information article is below.
No, they are not the same quality, and vary considerably in price. At first glance, on the packaging, it may look like 18/10, but a closer inspection may reveal, that it is actually only 18/0. No wonder the price was so good; a neat marketing ploy. And if these specs are missing altogether, this product may not really be stainless steel. So let’s have a look at these differences.
A. Stainless steel is a composite of different steels and varies in terms of grades for different uses. The main ingredient is chromium, and nickel has been added to provide a resistance to corrosion.
Therefore 18/10 means 18% chromium and 10% nickel. The higher the nickel content, the more protection from corrosion. Prices vary considerably depending on these specs, so don’t be fooled into thinking you are buying the best quality, if the nickel content is 0%.
However, some manufacturers will label utensils with a slighter higher than 8% nickel content, such as 8.3% as 18/10, since it doesn’t quite fit in the 18/8 category, and this is allowable. A little deceiving, none the less.
It should be noted that even the best stainless steel is subject to occasional pitting and corrosion.
These can usually be removed with a stainless steel cleanser.
When shopping, take time to open the package and handle a utensil. An 18/10 spoon has a great ‘feel’ in your hand, the polish is terrific and they are very elegant looking. These are definitely well worth the higher price.
And last, check the packaging for other product information, especially international or national standards, to ensure this product meets acceptable standards for your area. After all, you want to be sporting these new table tools for years to come.
Basically the higher the number the higher nickle content and the more expensive or better quality the piece is.