Seems like multiple solid black design, using heavy lines as visual guides and to add visual interest, printed on paper or various different colors.
Visual Echo - A Greek Design Paradigm (Student Project) - Packaging of the World - Creative Package Design Gallery - http://www.packagingoftheworld.com/2016/01/visual-echo-greek-design-paradigm.html
Uselab / by hopa studio
“저작권 문제 없나?”…무료 한글 글꼴 37종 총정리
Iris font is a free compete round font with no sharp angles.This font is called Iris, because when you look at the a you’ll see the a looks like an eye. You can see this in a lot of other letters from the iris font.