1970 Kellogg set

steve B · #1 05-11-2015, 09:37 AM

The company that owned the process also made postcards and some larger souvenir type items. I have a few and even the big ones are still Ok.

So far the Sportflics and another mid 90's 3d set are also fine.

Most of the Kelloggs I have are ok too.

But some licensed 3d postcards I have came very curled, and probably can't be straightened.

I believe the problem is the plastic shrinking a bit while the paper on the back doesn't. Humidity would make that worse since the paper might expand. Some plastics shrink as the plasticizer dries out of them. Sunlight and heat would make that worse too, so 3d stuff stored since new would probably be decent, ones trucked to a flea market for a couple years probably not.

The late 70's set I got through the mail came in four card panels. They didn't curl, but did separate a bit. I'll have to check and see if the ones from inside the boxes are different.

Steve B

ALR-bishop · #2 05-11-2015, 09:52 AM

Some years back Kodak offered disposable 3D cameras. They had 3 lenses and in the right circumstance turned out some cool pictures . The pictures were thick and had a plastic feel to them. I think basically each picture involved three pictures superimposed on each other. I took a bunch of them on trips, but they have not held up well over time. Here is an example, although the 3D effect does not show up as well in a scan

Econteachert205 · #3 05-11-2015, 10:09 AM

I thought the curling was similar to why artists primed both sides of old wood panels for oil painting, that if one side was left untreated, it would lead to curling.

ALR-bishop · #4 05-11-2015, 02:08 PM

Compliments of another board member

Beatles Guy · #5 05-11-2015, 02:43 PM

I learned to never try and straighten out any Kellogg's that are curled. All cracked within a week of being put in a top loader. Love the looks of these, they are just a pain.

Gr8Beldini · #6 05-14-2015, 11:36 AM

Quote:

Originally Posted by Beatles Guy

I learned to never try and straighten out any Kellogg's that are curled. All cracked within a week of being put in a top loader. Love the looks of these, they are just a pain.

At the National a few years back, I bought a bunch of heavily curled, otherwise flawless 1971 Kelloggs. I figured they weren't doing me any good curled like that... I took a hair dryer and heated up the plastic, then carefully slid them into a penny sleeve, then into a top loader. It resulted in a 50% success rate. The ones that cracked were cracked pretty heavy; but a good number didn't crack. Not sure if the hair dryer did anything to improve or hurt my success rate.

Orioles1954 · #7 05-14-2015, 01:43 PM

For some reason 1975 Kellogg's are very very prone to curling and cracking. Finding a high-grade 1975 set is always a challenge.

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