Picross -LogiartGrimoire-: Emil's Magic Training, Part 1

Emil has begun training to create Logiart puzzles, just in case!
Feel free to try out the records of his hard work.
It seems he still needs more training, but maybe he’s already managed to create a perfect puzzle now and then...?

This training includes:

6 puzzles of 10×10 size
6 puzzles of 15×15 size
4 puzzles of 20×15 size