What kind of plastic is used to make large format holders?

[zozur]

PVC? ABS? I'm just curious.

 

[locutus]

Looks like polystyrene to me.

 

[neilt3]

Some of mine are some sort of hardwood .
One type I have seems to be mostly metal .
Other's , some sort of plastic .

So I guess it varies .

 

[Kawaiithulhu]

polystyrene

That would be my guess, too.

 

[DREW WILEY]

Depends. Even darkslides have changed plastics over the years. ABS and styrene are common but not universal.

 

[WilmarcoImaging]

I would say glass filled ABS.

 

[harlequin]

I heard from someone who worked at holder facility in Burbank CA, ABS and Cycolac.

Hope this helps you....

Harlequin

 

[mshchem]

PVC? ABS? I'm just curious.

This is a really good question. It is definitely a high impact material. It's very stable doesn't warp or bow when warm. The holders have a smooth surface, My guess would be a blend of some sort of styrenic and possible polycarbonate. High Impact polystrene, ABS. Doesn't look like it has a significant amount of glass fiber or you would be able to see it. Doesn't mean it's not filled with glass or mineral. This is a link to one Covestro's (formerly Bayer) PC/ABS blends there's thousands of different concoctions out there.
https://www.plastics.covestro.com/en/Products/Bayblend

The darkslides almost look like a old thermoset like Bakelite or melamine filled with some sort of mineral or fiber. It's not an ordinary plastic.

Is there still NEW Fidelity and Lisco film holder being manufactured?

 

[mshchem]

https://www.photrio.com/forum/threads/want-to-restart-fidelity-film-holder-manufacturing.115535/

FYI