Here is a picture of a Treet Silver Blade.
It doesn't look like a Carbon blade. Poppi, come tell us.
Malocchio is an expert on Treet razor blades.
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Well...The difference between silver carbon ,black carbon and Gillettes famous blue carbon blades is determined by the metal alloying percentages,and to a lesser extent the processing of the metal...If you really want an in depth explanation ,dive into this: http://www.google.com/patents/US6763593 ...too deep for my old brain !!
Be careful, they're sharp.Next up is the Treet 7 Day blade.
The one I tried was going strong at the end of the seventh shave.Now if it last 7 days as advertised, I don't know but it's going to be fun finding out.
Read the post/link that maloccio posted. As I said, I'll stay with GPP blades and my Wilkies. They shave great and no irritation.