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TIFF is an uncompressed file format, so the highest quality, but it results in very large files.

TIFF can also be LZW compressed.

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The industry print standards are 300dpi saved as a .TIFF, but I've done side by side prints from JPG and TIFF and there is no noticable difference at 12x18.

The nice thing about receiving photos in TIFF is they retain their chroma resolution for image processing before going to print. Also, it should be mentioned that any "ink" prints (on a press or desktop printer) should be done from a CMYK colour space file (for 4 colour) or LAB colour space file (for hexachrome), while a traditional "photographic" print (to photographic paper) should be done from an RGB color space image.

Bren R.