Calbee, a major Japanese snack maker, has announced a temporary switch to monochrome packaging for some of its potato chips. CNN’s Hanako Montgomery explains why the move has to do with the Iran war.

Calbee to switch its brightly coloured packaging to black and white because war has disrupted supply of certain raw materials used in ink

The effective closure of the Strait of Hormuz has severely disrupted global supplies of energy and petrochemicals.