1) What's better if I want to make an enlargement - let's say to 36x26cm - of a picture: slide or negative?
2) I made for the first time slides. I used Kodak Elitechrome 100. With the loupe, the slides look awesome, above all the colors. I made a paper print of some of the slides - 10x15cm - in a shop and those prints do look somehow grainy, even more than pictures made with a 200 negative film. When I scan them, I see fine parallel lines all over the picture. Why is that? What's wrong?