>>3903048>But how is a Soda bottle more air tight? Or do you mean you pour it into a couple bottles to "ration" it so you only open 1 bottle at a time for less oxygen?Yeah exactly.
Or squeeze all the air out and close the cap.
>Oh so even though I'm overexposing I still want it developed at the box speed?Yes exactly. Pulling colour negative film (=developing less time) is virtually unheard of.
For B&W film, overexposing *and* underdeveloping (pulling) is an option, when you want to reduce the contrast of a contrasty scene and make sure you have lots of detail in the shadows and *not* blown highlights at the same time. It's a nice look, and you don't have to worry about colour casts.
But in colour, the sacrifice in colour casts is usually not worth it, especially combined with the fact that colour negatives have more latitude (=can handle scenes with bigger contrast) than B&W.
>Would it make sense to overexpose by 2 or even more stops then seeing as my film is actually nearing 2 years (bought it in October or November 2019)Up to 2-3 years it's absolutely fine, don't worry about it.
If you want to overexpose more, you could, with no ill effects.
As I said, I'd start with ISO100 for 250D and ISO200 for 500T.
Maybe you can shoot a couple shots (within the same roll, maybe the same subject too if you want) at different exposures, to see what you like best.
Say find a scene, with the ISO set at 100, take a pic. Then same scene, set the ISO to 200 (and of course adjust aperture or shutter as indicated by your meter), take the same shot. Then set the camera at ISO50, take the same shot.
Once developped and scanned, you can compare the exposures to see which on you like best.
In the end, all the theory in the world can't make up for what you see and prefer with your own eyes.
So that's the theory, you have a good starting point. From there on, try some things out and judging from the *results*, see what you like best and use that in the future as a guide.
