Making cell phones takes a lot of materials and tools. Senku begins by upgrading their equipment using the waterwheel Chrome and Kaseki invented and built together.
It glows blue when exposed 
to ultraviolet light.
.يلمع عندما يتعرض للأشعة فوق البنفسجية
Die leuchten in Kontakt
mit ultraviolettem Licht blau.
Brilla bajo una luz ultravioleta.
Brilla bajo una luz ultravioleta.
Les ultraviolets
lui confèrent des reflets bleus.
Se viene colpita dai raggi ultravioletti,
emette bagliori azzurri!
Ela brilha azul quando 
exposta à luz ultravioleta.
Он светится синим под ультрафиолетом.