How to flatten comics properly?

You can use a heavy flat object and put the comic book under it for a while. That might do the trick.

You can use a smooth surface and gentle pressure to flatten comics. Place the comic on a flat table and apply even pressure with a heavy object for a while.

Well, to flatten comics in Krita, you first need to select the layers you want to flatten. Then, look for the 'Merge Layers' option in the layer menu. This will combine the selected layers into one, effectively flattening them. Also, make sure to save your progress regularly to avoid losing any work.

You can use a heavy object to press on the comics for a while. That might help flatten them.

You can try laying them flat under some heavy books for a while. That might do the trick.

You could try scanning the comic and using image editing software to adjust the perspective and flatten it.

Don't stack them haphazardly. This can cause bending and creasing. It's better to organize them neatly on shelves or in storage boxes.

You need to pay attention to panel layout, speech bubble placement, and consistent lettering. Also, think about the flow of the story and how each page leads to the next.

You should keep comics in a dry and cool place. Away from direct sunlight and moisture.

To ship 13 comics, you could consider using a priority mail service for better tracking and protection. Also, include a packing slip inside the box listing the contents. Remember to mark the package clearly with the recipient's address and your return address.