I have some old maganizes and is wondering....

No theres no discoloring plus there in black & white and some are in color but theres no fading or yellow tint to them. I have them in the zploc but I made sure all the air is out of them and no they don't have any odors to them at all. Oh ok thank you so much.

It is not if there is air in them or not the plasticky material that ziplocks are made of are not ph nuetral. They are fine for food or storing things short term, but over time moisture just out in the environement can affect the paper and make it brittle or mildewy even if there are no apparent wet spots in the bag. Paper needs to breathe. That's why a laminated piece of paper can sometimes still turn colors if its newsprint. That is why the US Constitution is behind glass with temperature controlled air behind it rather than just between too sheets of glass. It is better to store them in an acid free plastic like glasine, but even better, buy an acid free folder or box to put them in and lay them flat. I think older magazines are very cool. I keep neat stuff like that from my family (some people say I keep too much!) but I definitely think you aren't keeping them for no reason - they will be a great connection to your grandfather. We tend to remember the big things generations later - like how many kids someone had but its neat to know/have little things they may have handled day to day like magazines they read or current event stuff they thought about.