Hi all, Just to start I'm new with all this scanning negatives into the computer stuff. Yesterday I bought a HP photosmart 3210 scanner printer copier all in one and I tried to scan the negatives that I developed at my home. I did not get the effect I wanted. The color came out reddish sometimes. My question is how do you turn a negative into a positve once scanned into the computer to make it look like a real picture? please help I hope this printer gets used.