It's the glossy stuff you don't want to burn. The finish and inks are what give off the gases. Almost all, if not all newspaper printing is soy-based ink now, black or color. I have a hard time keeping enough around, don't ever buy newspapers anymore. Reduced to burning the Pennysaver and school newspaper that comes in the mail...
Learning the "newspaper knot" is what got me using much less paper. 3 or 4 knots will get a good stack of kindling burning nicely, you'd have to use probably 3-5 times as many sheets of crumpled stuff to do the same. First time I used them, AND lit a top-down fire at the same time really got my friends riled up. But most of them do both now themselves.