Japanese social media users are posting black-and-white images to highlight a shortage of naphtha used in ink and packaging [1].

The movement, known as the “naphtha shortage black-and-white challenge,” signals growing public concern over industrial supply chain instabilities. Because naphtha is a critical component in the production of various inks, its scarcity directly impacts the ability of manufacturers to produce colored packaging for consumer goods [1].

This shortage has already forced some companies to alter their branding strategies. A prominent potato-chip brand has reportedly switched to monochrome packaging due to the lack of available ink [2]. The shift from vibrant colors to black-and-white serves as a visible indicator of the resource scarcity affecting the manufacturing sector [2].

Netizens are using the hashtag to spread awareness about the crisis. By stripping color from their posts, participants mirror the forced aesthetic changes seen in the retail market, creating a digital protest that visualizes the industrial struggle [1].

The challenge has spread across various Japanese social media platforms, turning a technical supply issue into a viral cultural moment [2]. While the trend began as a way to draw attention to the naphtha shortage, it also reflects a broader anxiety regarding the availability of raw materials necessary for daily commerce [1].

Industry observers said that the transition to black-and-white packaging is not a stylistic choice but a necessity driven by the inability to procure standard printing materials [2]. As the challenge grows, it puts a spotlight on the vulnerability of the chemical supply chain in Japan [1].

“Netizens are using the hashtag to spread awareness about the crisis.”

The 'black-and-white challenge' demonstrates how industrial resource shortages can trigger grassroots digital activism. By linking a tangible product change—such as the potato-chip packaging—to a social media trend, Japanese citizens are highlighting the fragility of the naphtha supply chain, which is essential for the petrochemical and printing industries.