- K&F CONCEPT Linear Polarizing Film A4 Polarized Film Sheets Optical 20x30cm for Screen Educational Physics

High quality sheet. I wasn't sure it would work but this worked perfectly for what I needed it for! Easy to cut to fit and fixed my projector after the polarizing film got burnt. Plenty of material to mess around with in case of mistakes and a good price.

Good quality polarizing film for science projects.

Used it for something else but worked great

This polarizing film is exactly what I was looking for in my lab. I needed two things. First, a single layer that I could align for single plane polarization. Second, two layers that I could orient relative to each other to control overall light transmission. This film gave me both things that I needed and I was able to cut it to fit. The film itself has good overall transparency, it is clear (no fogging or frosting), and it is thin enough I could install it where needed. In my case the film is installed in a location where it won't be touched after installation. That eliminated any worry I had over scratching.

Works as it should

I bought this to refresh my dash display on my e90 and it worked really well. Please note that you will have to place film in front of dash and adjust it with your hands to get the perfect visual before cutting. Once you get the position, make the cut in that same position otherwise you will be wasting film.

Good material. Not flexible. And Definitely not for glasses.

The polarizing sheet was comparatively priced, manufactured well and worked very well with the experiments I wanted it for. the package surprised me with a free gift I did not expect to help keep it clean and keep it clear. I cannot see it being better for what I needed and expected

I was hoping that this film would have a higher extinction factor. Would have been good if the spec was listed somewhere. In the end I would estimated weak polarization selectivity of about 4:1.

Excellent product, did exactly what it said it would, and cheap!

Je l’ai installé avec une light pour gérer la lumière et ça fonctionne très bien !

Ce sont de vrai filtre polarisé, j'avais acheté un filtre d'un autre vendeur moins cher sur amazon qui ne fonctionnait pas. Pour vous assurez qu'il fonctionne: tournez de 90 degré une feuille par rapport a l'autre elle deviendra noir. Celle-ci réussi le test ! Merci pour votre produit de qualité bien emballer. Je suis très satisfait

All you need in one package. Used it on several devices to improve and/or later the display readability. Testen other suppliers, but this set is bybfar the best.