Adjust Date & Time doesn't stick on export

Question

I have scanned over 2000+ negatives in a Tiff format. I created a temporary iPhoto Library so I could import them in, sort them in albums, and make some edits (crop and straighten). So far so good. I have now for each album adjusted the date and time (I also checked the box for change original file). My next step was to export these albums to folders with the edit pics to the Finder (The reason is to run a photoshop action on all the pics to remove some scan noise and to convert the Tiffs to Jpeg). The once done I was going to import the final pics to my master Library
The problem seams to be that when exporting the pics the changes in dates from within iPhoto are gone. The Finder is showing the scan date not the modified dates....
Any help would be greatly appriciated
Does anyone know a work around to this problem?

Answer 1

Tony:
As Larry pointed out scanned images are not created with the EXIF data fields. Those must use the file created/modified dates.
I found a way that works for me as far as keeping photos organized chronologically and alphanumerically. I rename them, before importing into iPhoto, with the international date and a brief description as follows: [email protected]. I upload to a folder with the title 04/12/09-Easter @ TH and then drag that folder into the open iPhoto window.
This gives me an Event with the title I want and the files with a file name that can be easily searched or sorted chronologically or alphanumerically. A little work upfront saves a lot of headaches later down the line.
TIP: For insurance against the iPhoto database corruption that many users have experienced I recommend making a backup copy of the Library6.iPhoto (iPhoto.Library for iPhoto 5 and earlier versions) database file and keep it current. If problems crop up where iPhoto suddenly can't see any photos or thinks there are no photos in the library, replacing the working Library6.iPhoto file with the backup will often get the library back. By keeping it current I mean backup after each import and/or any serious editing or work on books, slideshows, calendars, cards, etc. That insures that if a problem pops up and you do need to replace the database file, you'll retain all those efforts. It doesn't take long to make the backup and it's good insurance.
I've created an Automator workflow application (requires Tiger or later), iPhoto dB File Backup, that will copy the selected Library6.iPhoto file from your iPhoto Library folder to the Pictures folder, replacing any previous version of it. There are versions that are compatible with iPhoto 5, 6, 7 and 8 libraries and Tiger and Leopard. Just put the application in the Dock and click on it whenever you want to backup the dB file. iPhoto does not have to be closed to run the application, just idle. You can download it at Toad's Cellar. Be sure to read the Read Me pdf file.
NOTE: The new rebuild option in iPhoto 09 (v. 8.0.2), Rebuild the iPhoto Library Database from automatic backup" makes this tip obsolete.