As much as he disturbed people on this board, CSI-guys technical questionings were never adequately addressed and still leave me wondering if the technology cannot be overcome and/or copied.
CSI-guy, who simply disappeared after March 16th with nine posts in eight days only on this board had these remarks.
Partial repost of post #2321.
1. "Most advanced high end technologies" - No, the current technology dates from the 1990's with little change. In fact, it actually dates from the 1920's. The X-ray alloy analyzer is current, but even its technology dates back half a century. And it's not SSTY's.
2. "unique and irreplaceable nature of reliability" - Who knows exactly what this means? My guess is that they are trying to say that SDNA has unique codes that cannot be duplicated and is fully reliable. Wrong again. SDNA uses elements for its encoding. Real elements not synthetic ones - there are no such things - so this means that anyone else could make up the SDNA marking ingredients if they knew the ingredients. How do you find out the ingredients? A low-cost mass spec will give you all of the elements in their exact amounts. A simple chemical math routine will give you the recipe. All you need is one SDNA-doped label.
3. "Cannot be copied, counterfeited" Wrong. See above. It can be done in a day or two. The only benefit would be to keep changing the codes constantly, which is possible, but not practical.
4. Low cost - yes it is. It can be relatively low, depending upon the elements used.
5. There has never been any independent tests to show if something marked with SDNA is burned up, that it can be identified from the residues or ashes. This is speculation and SSTY has never produced any independent testing documnentation to verify its claims for indestructibility. In theory, SOME of the rare earths have high vaporization points. But SDNA is also made with non-rare earths with very reduced vaporization points, some as low as 500 degrees.
6. There is a claim that the marking elements are inert and non-volatile. This is just not so. Many of the rare earths have deadly effects and some are suspected carcinogens; others have devastating effects upon certain target organs and a few have never been tested for lethal dose limits. Only a couple of the elements, which must be inorganic (metals)to be visible to the analyzer, are truly inert and non-toxic. Go and fetch off the internet the MSDS information for the elements involved and satisfy yourself: La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Er, Yb and likely Rb, Sr, Y, and Zr as well. For true non-toxicity, there are only a couple elements that qualify and are economically viable.
