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That means the signal is entirely in the tin layer, if one is present. Not a good thing, as tin is not a very good conductor. Tin has about seven times the resistance of copper). So anything at 1MHz or higher should not have a tin layer. It needs to be bare copper. That means video cable, digital audio cable, RF coax or Category data cables all need to be bare copper. No tinned copper.
White tin is the normal form of the metal and has many uses. Unfortunately, white tin will turn into gray tin if its temperature falls below 13.2Â°C. This change can be prevented if small amounts of antimony or bismuth are added to white tin. Tin resists corrosion and is used as a protective coating on other metals. Tin cans are probably the most familiar example of this application. A tin can is actually made from steel.