When did cook's illustrated change their paper stock?

[allisen]

So Cook's Illustrated is now on glossier stock paper. I know it's not glossy like Bon Appetit or most other magazines, but it is glossier than it used to be. Does anyone know when they made that shift?

I'm trying to buy some back issues so I can frame the back covers, but I want to make sure I buy the right years so it's the old, totally matte paper.

Thanks

[LabRat]

I first noticed it in the issue I received two months ago. I greatly preferred the old paper, the new stuff feels too thin and delicate. There also seemed to be several areas where the ink appears smudged.