Good morning,
It's difficult to find a starting point, but Sweeneys field experience, comparing the quality is a good starting point: James, since when has science, been able to test and put norms to a matter belonging to the subtle?
On our "DOWN" page, you find a A + B deduction, of what causes the difference, and this is underlined with 5 videos. Shooting these videos, can only be done if you are connected to the "fatty goose channel", and Valandre is directly and exclusevely connected.
The elasticity described by James, is the direct result of a 4th molt quality, from a mature fatty animal. The exceed energy goes into the feathers and down, as the bird prepares for migration.
Down treatment is under strict veterinarian control, since the outbreak of avian flue. These rules, makes that all down qualities undergo the same treatment, in washing and sterilization. And this forces the same allowance of maximum oil content ON the matter. But ON is not IN, and the steroid effect comes, as the animal is over fed during the 4th molt production.
This over feeding process, can only be done, once the animal reaches the age, to self over feed them selfs, and this is what the French frois gras, is all about. So, these animals live longer and become more mature.
On the other hand, you have animals raised for meat production, and this can be found world wide: China, Vietnam, Eastern Europe and so on, and the volume produced is in relation to the nations population.
Any farmer, raises animals, to be sold so they make a living. Meet producing geese (and ducks) are slaughtered as soon as they reach their adult size witch is in the end of the 3th molt.
Over to Erics Filling power question: there are many labs world wide, that can do a filling power test, but every body seems to agree that the IDFL (International Down and Feather Laboratory)in Salt Lake City run by Mr Lieberman, is the best and most reliable.
Since the outbreak of the avian flue, traceability is a veterinary rule, so every branch is tested systematically. Due to the cost of a test, this is done every 1000kg,
and the test result is archived, so at any time, the quality can be tracked.
Valandre is not a very big player in this game, and we are delivered in a steady flow of max 100kg a time, so we are connected to the 1000kg filling power test.
The test is done under controlled ambient temperature and hydro metric conditions according to the norm, and the test samples undergoes a conditioning before testing. There are 7 different methods of conditionement, and there are different physical methods that are different in piston weight and cylinder volume. And this is the EU or US norms.
As FP claims suffer from wild spread inflation, it's not possible to judge a 850FP claim, without seeing the quality in real, but you can not go quite wrong if you take the origin and age into account.
I have never heard about Hutterite down, but heard a bit about Canadian white goose raising in Manitoba. And as I have not seen it, I can not comment. But I guess I have a idea.
I have already explained, what I personally make about the EN 13537 norm, so there are nothing to ad. The inter-lab meeting has been on the table for years, and when I started to shake the ITFH up, arguing that it was useless non sence, then the lab engineer informed about, a planned inter-lab meeting. This was two years ago, and we still have no meeting and we will never have! (who profits from the crime?)
Since the early start of Valandre, we have always indicated the extreme temp, and since the EN 13537 test, have published the ITFH test result according to this.
And you are absolutely right, to ask how it's possible to have -17c extreme and -1c L/C? I can't answer this to you, so call up those responsible for the norm. But before making the call,please check the PDF report.
What I can say how ever is, that by experience the L/C rating is around -5c and extreme around -10c.
The McCullough conclusion is not correct (while EN-testing ain't perfect, it seems better than "anybody can claim what they want"…..)
I can whip of the PDF on all pages, and make any claim I want and mark: "Tested according to the EN13537 norm". Nobody will control a EN13537 claim, and I will not be bothered by the CIA, FBI or the county cob.
To change this, pressure has to come from the users/consumers, as everybody is having a great time at the OR, and have no interest in any kind of control. (Now I am getting angry)
STOP, OVER AND OUT