Ektar 400?

I don't know why it wasn't advertised on the box, but the brochure for the Portra-3s definitely mentions 2 electron sensitization.

It was first used in a movie film.

Still films have never, at least as far back as the days of color, been improved before the movie equivalents, EVER.

Portra films contain 2 electron sensitization. AFAIK, the Gold family does not.

Ektar 100 shares the 2 electron sensitization and the new cubic / t-grain technology as stated by Kodak in their promotional ads.

The entire family of color negative films shares some components such as couplers, hardeners and etc, but the 2 electron sensitization, cubic and t-grain technology require a totally different mix of sensitizers, stabilzers and other addenda to make them work properly.

They are all coated using the same equipment.

Still films were improved before movie equivalents! Sorry, but this is also a fact. Until the movie industry moved away from Technicolor and other color systems, innovation at Kodak went into consumer products first, and it was not until the motion picture sales volume equaled the consumer sales that the R&D flip flopped. I can remember some pretty primitive motion picture products in the 60s compared with the consumer equivalents.

PE

Right. . . I said after the movie started using color [negative]

They were still using Ektachrome from the mid '70s until they discontinued it in slo-mo cameras in 2004, so obviously the reversal films were a different story.

We are talking about negative film here though, right? BTW, if you want to make a bet going back to Eastmancolor's becoming dominant in the industry to present for $20, you are on. . This is only for C-41 and movie negative film.