that it
Game set and match !
Game set and match !
Originally posted by Dietrich Maerz
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Here is the original text from Dr. Hansen:
"Here is the preliminary IR spec information. My suspension having been lifted, i was interestes in the interpretation of the other results. These results differ in a significant componant, in that a specific compound DER 664 UE was identified. This is a Dow Chemical product patented in germany in 1959, significantly after the war.
While it is true that epoxy resins were used pre war (actually earlier than the IG Farbin information stated), the compound is a specific bisphenolic A siliconated resin with a very specific patent date. Siliicon bisphenolic resins were evluated by both Shell and Dow in the late 1940s as powedered coatings for wiring. It was later that these were used in paints. Dow produced this compound ininitally, but this was only used in marine and bathroom paints in the early 1960s. It was not until the late 1960s that this resin was used for retail use in commerical paints. This is based on communication from Dow Chemical, Dupont, Sherwinn Willliams, and Glidden paints. Electronic information is not available as they said this predated their electronic files.
This cross is a rounder in all respects with regard to the beading, core and paint and has been evaluated as being a genuine rounder in all respects by members of this forum on a previous thread. The possibilities, as we have seen with other RKs of an eaxact duplication of beading charactereistics and cores is essentially impossible, therefore I do think we can conclude this is a fake rounder. It is a rounder and a representative example of that maker.
For those believers in the rounder, how can the presence of a 1959 patent date be compatible with wartime production?
I will try to get the photos of the information later. A compaison was made with linseed oil- no match. The match with DER 664 UE was within a 95% confidence limit."
So it's not just Bisphenol-A (what the english investigation showed conducted by Allan Pilch with 3 rounders a little earlier than the one done with one Rounder by Dr. Hansen), regarding to this US-based investigation, it is DER 664 UE.
"Here is the preliminary IR spec information. My suspension having been lifted, i was interestes in the interpretation of the other results. These results differ in a significant componant, in that a specific compound DER 664 UE was identified. This is a Dow Chemical product patented in germany in 1959, significantly after the war.
While it is true that epoxy resins were used pre war (actually earlier than the IG Farbin information stated), the compound is a specific bisphenolic A siliconated resin with a very specific patent date. Siliicon bisphenolic resins were evluated by both Shell and Dow in the late 1940s as powedered coatings for wiring. It was later that these were used in paints. Dow produced this compound ininitally, but this was only used in marine and bathroom paints in the early 1960s. It was not until the late 1960s that this resin was used for retail use in commerical paints. This is based on communication from Dow Chemical, Dupont, Sherwinn Willliams, and Glidden paints. Electronic information is not available as they said this predated their electronic files.
This cross is a rounder in all respects with regard to the beading, core and paint and has been evaluated as being a genuine rounder in all respects by members of this forum on a previous thread. The possibilities, as we have seen with other RKs of an eaxact duplication of beading charactereistics and cores is essentially impossible, therefore I do think we can conclude this is a fake rounder. It is a rounder and a representative example of that maker.
For those believers in the rounder, how can the presence of a 1959 patent date be compatible with wartime production?
I will try to get the photos of the information later. A compaison was made with linseed oil- no match. The match with DER 664 UE was within a 95% confidence limit."
So it's not just Bisphenol-A (what the english investigation showed conducted by Allan Pilch with 3 rounders a little earlier than the one done with one Rounder by Dr. Hansen), regarding to this US-based investigation, it is DER 664 UE.
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