I actually have a harder time getting a good knot out of Chipp grenadine tie's then I do others that I own. I bought a few a few years ago that are downright flimsy. I bought another just last year that feels like it has a thicker lining and that one is ok. The rest I got rid of. I asked him if they changed anything and he said no, but handling the more recent one vs the older it was obviously thicker and heavier.
I got mine a year ago, maybe a year and a half. It has a nice hefty lining which makes it perfect for a FIH knot, a double would make it look like this guy: