Figure 20. Six kinds of soap bubbles. 1) No. 1: Spherical bubble attached to the building wall; 2) No. 2: Giant soap bubble; 3) No. 3 on the concrete. This bubble floated in the air for over 1 min and was often long-lasting on the ground; 4) No. 4: Often the upper hemisphere seemed to be absent; 5) No. 5: Unstable in air and on a solid surface; 6) No. 6: a long-lasting hemispherical bubble on a solid surface

From

Practical Chemistry of Long-Lasting Bubbles

Momoko Ueno, Naho Isokawa, Kazuki Fueda, Suzuka Nakahara, Hinako Teshima, Nanami Yamamoto, Haruka Yokoyama, Yukina Noritsugu, Koushi Shibata, Kourin Miyagawa, Seiko Tanaka, Takashi Hirano, Ayako Fujito, Ayaka Takashima, Kenichi Kanno

World Journal of Chemical Education. 2016, 4(2), 32-44 doi:10.12691/wjce-4-2-2