> Does the higher the thickness of the silver plating indicate the better quality?
It might not be unless you had too much money. Silver is expensive and performs worse at the eating utensil-functions than steel. It may one day have been useful as a means to prevent rust (in which case a thin layer would have been sufficient), but nowadays with stainless it just adds to the cost and makes knifes blunt, so it only makes sense as an investment, in other words for people with more money than they need. But then why bother going through the process of silver-plating utensils? You might as well buy a block of silver. In which case, if you really want to use it for a utensil, you might use it for a hammer. In which case it would add to the functionality because silver is heavier. To prevent silver chipping off, it could be steel-plated. So why do we have silver plated steel cutlery and not steel plated silver hammers?