I have always produced magazines with saddle stitches and know how to prepare files for print. Now I need to make A5 magazine with perfect bound with overall ~190 pages. My questions are:
Covers: about perfect bound and spine size - I understand that it depends also on paper, should the printer give this size based on page count?
If I know it will be printed on uncoated matte paper, does printer say which color profile to use after exact paper is being choosed? What should I keep in mind technically when designing magazine with uncoated matte paper? For body text should I use always 100% black?
Serif font size for body text: what is the size that would be not too small? I plan to go with 10pt and leading about 13pt or 14pt.
Margins: if the main part of magazine is text, I understand that inside margins should be pretty wide, when reader opens spread it can be seen easy, but the other three margins, do I need to keep something in mind like mandatory or it is up to me because of what design I will make?