Saving a scan in Tiff or jpeg???

[jerseyboy]

I am working with a colleague scanning some archive 10x8 inch photos. I have convinced him to scan inTIF at 600 dpi. The resulting TIF file is about 60 MB. We make a few retouches and then he wants to save it in JPG as it is then only 4MB. I know that there is something inherently wrong in doing this but he has opened the 2 resulting files, compared the pixels and sees no difference, and it is true seen like that, there is not much noticeable difference on the screen between the 2.

Any enlightenment please?

Many thanks.

 

[iDad]

Save as .png, JPEG is going to loss quality every time you open them google jpg vs png there are many explanations out there.

copy/paste info:
Which File Format Should You Choose?
The help manual of a popular screen capture program offers the following suggestions

GIF format is limited to 256 colors and is a lossless compression file format, a common choice for use on the Web. GIF is a good choice for storing line drawings, text, and iconic graphics at a small file size.

PNG format is a lossless compression file format, which makes it a common choice for use on the Web. PNG is a good choice for storing line drawings, text, and iconic graphics at a small file size.

JPG format is a lossy compressed file format. This makes it useful for storing photographs at a smaller size than a BMP. JPG is a common choice for use on the Web because it is compressed. For storing line drawings, text, and iconic graphics at a smaller file size, GIF or PNG are better choices because they are lossless.