Is it normal for Kem Cards to cup like this? (6 Viewers)

[maxim_666666]

But why are they sometimes straight and then bend later? There are only two answers to this:
1) you were lucky and got cards from flat sheets! They will remain that way permanently.
2) Humidity affected your bent cards, making them temporarily flat.
I just conducted a simple experiment with a wet wipe and a card made of cellulose acetate (blue Modiano Platinum and PVC ( Modiano Cristallo).
Start

4 hour later.
The acetate card became flatter, while the PVC card bent like a banana.

After 12 hours, both cards returned to their original state.

 

[maxim_666666]

However, I must note that I do not consider this a drawback.
Acetate cards are very good and definitely better and more pleasant than PVC (not always, but very often). And if the price is reasonable, I would choose acetate cards without hesitation.
For example, with high-quality paper cards, no one is bothered by a slight bend, and overall, I like that it makes it easier to pick cards up from the table. On the contrary, it irritates me when I struggle to lift a flat PVC card from a flat table using my nail or another card.

 

[maxim_666666]

And I also contacted a major Modiano card dealer in Italy and he promised to check with the factory to see what was going on with the cards. He was surprised that people thought they were bent. Obviously, it's on Kem, but it's exactly the same situation.

 

[maxim_666666]

Yesterday I experimented a lot and was able to get my acetate cards back!
And I succeeded!
They feel fantastic!!!!

Here's an old photo of what they looked like!

 

[Phyffe]

Yesterday I experimented a lot and was able to get my acetate cards back!
And I succeeded!
They feel fantastic!!!!
View attachment 1422704


Here's an old photo of what they looked like!

View attachment 1422706
View attachment 1422705
View attachment 1422707
View attachment 1422708

Wait, so you straightened them out with a wet wipe?

 

[maxim_666666]

Wait, so you straightened them out with a wet wipe?

No. In the experiment with a wet wipe I only showed why the cards bend after purchase.
And I straightened these with heat.
But, this is Modiano. I don't have acetate Kem to experiment with. But, I think the difference is small and it will work with them too.
It was the video with Kem that gave me the idea to try to straighten them.

 

[SwissChip]

 

[davefr]

Report back in a few weeks. If they're like KEM you can straighten them but they gradually return to their previous warped state.

 

[maxim_666666]

Report back in a few weeks. If they're like KEM you can straighten them but they gradually return to their previous warped state.

Ок

 

[Phyffe]

No. In the experiment with a wet wipe I only showed why the cards bend after purchase.
And I straightened these with heat.
But, this is Modiano. I don't have acetate Kem to experiment with. But, I think the difference is small and it will work with them too.
It was the video with Kem that gave me the idea to try to straighten them.

Maxim,

Very interested in your technique as I use a lot of Modiano. Could you go over your heat treatment method please?

 

[maxim_666666]

Maxim,

Very interested in your technique as I use a lot of Modiano. Could you go over your heat treatment method please?

A little later...