What is the best recipe for making soap bubbles?

Emmanuelle Rio blowing bubbles in a bubble. Serge Guichard/CNRS - A soap bubble attracts the attention of young and old. Who has never wondered the recipe of these fascinating bubbles or how to get the biggest one - In collaboration with artists, who have a great empirical knowledge of the recipes that work in their acts, a team from the Laboratory of Solid State Physics (CNRS/University of Paris-Saclay) has identified the main ingredients ensuring to get the best bubbles. The results of this study and a second one were published in December 2022 in the European Physical Journal E and Physical Review Letters . Both artists and scientists need stable bubbles. The former to design spectacular acts, the latter to study two-dimensional turbulence or surface undulations, for example. Bubbles are also a basic element for the study of foams.