The Greenpeace reports are good, but are not something that I agree with in the conclusion stage at all, To me some wrong some presumptions have been made. Product that lasts a long time has the biggest footprint from the stage that it has been bought, but if you do not extend its usage stage, then an even bigger overall footprint happens during the manufacturing stage
but the performance of fluoro-carbon DWRs are still at a higher level. If I was doing a summit like as mentioned in the article, my choice would be for the best gear out there so as to increase my safety margin as my skills aren't as good as a professional mountaineer
I take on board what you say about Grangers, but as others have indicated; I feel this has been done in reaction to the competition has offered. Both Nikwax & Storm has led the way with different technologies, hence why my loyalty is towards them
Before someone highlights that Grangers is the company that has BlueSign approval; I think that exposes how poor the BlueSign methodology is. I like BlueSign, but know that they are a Swiss marketing company that specialises in environmental audits. Nikwax & Storm is better product. BlueSign have profited from working with Grangers
If you heat-cure a Nikwax treatment the effect will last for longer. I know you don't have to do it for it to work, but if you want to cut down on the hassle of continually having your machine on service-wash cycles. Try it!
Almost all the money is being invested in PFC-free DWRs; unless you know something I don't. The PFC ones still have the best performance, which is why brands don't want to swap for something that is not as good
You are right in that it would be best to match chemistries, but finding out details of what brands have used is very complicated. Fortunately Nikwax does work well with most of the DWR formulations. If you heat seal Nikwax product you do increase their durability. However nothing I have come across is as durable as a factory applied DWR. I am not a fan of Graingers as they still use PFC technologies - the interesting progress is from both Nikwax & Storm IMHO
I am not convinced with external membranes durability in UV
Sympatex use a Carbon 0 DWR from Rudolf; on top of which it is the only membrane which is recyclable
The standards help those (the majority) who are confused by the whole subject (i.e. those that get muddled up between weatherproof & waterproof); although they aren't ideal - at least they are better than nothing. I think that the degree of knowledge demonstrated on this thread (by Capt P & others) just shows they are not beneficial for us...
Paramo is great gear but remember that it is just a weatherproof windproof according to British Standards. Gore spent £50 million advertising their brand across Europe between 2010 & 2015; that convinced a lot of customers that they need to have a waterproof...
The majority of hydrophilic applications are actually in waterproof membranes; it was the technology that Lowe Alpine's original TriplePoint was based on
To get away from Buy & Throw people should embrace GiftYourGear.com
Although you don't need to heat-treat post applying Nikwax, if you do you will improve the durability of the DWR (ie. make it last longer)
If you use a regular washing machine to apply water-proofing treatments, make sure you do a service wash in it first (no contents/ no detergent/ maximum temperature/ 1/2 cup of white wine vinegar). Doing this to your machine every 25 washes will make the machine last longer & improve the effectiveness of your low temperature washing...