Ink-flation: How the Iran War Is Taking the Color Out of Your Favorite Snacks
Walk down any snack aisle in Japan right now and you might notice something peculiar: the packets look different. The familiar splash of red for lightly salted crisps, the vivid greens and yellows signaling seaweed flavors, the cheerful palette that makes Calbee's products instantly recognizable to millions of Japanese shoppers. That color is vanishing, at least temporarily, replaced by stark black-and-white packaging that feels almost like a throwback to another era.
Calbee, Japan's dominant snack maker with £1.5bn in sales last year, announced in May 2026 that it would strip the color from 14 of its most popular products, including Potato Chips, Kappa Ebisen snacks, and Frugra breakfast cereal [1]. The new-look packets started appearing on shelves from 25 May. Calbee framed the move as pragmatic necessity rather than aesthetic choice. "This measure is intended to help maintain a stable supply of products," the company said in a statement [1].
What Calbee did not say explicitly, but what industry observers quickly connected, is that the colors did not disappear because of some design revolution. They disappeared because of a war on the other side of the world.
The Strait That Moves Everything
The chain of events traces back to late February 2026, when US and Israeli strikes on Iran prompted Tehran to retaliate by effectively closing the Strait of Hormuz [1]. This matters enormously for global supply chains because roughly one-fifth of the world's oil supply passes through that narrow waterway between Oman and Iran [2]. The disruption sent shockwaves through energy markets, but the consequences extended far beyond the pumps at your local petrol station.
One of the most consequential secondary effects has been on naphtha, a petroleum byproduct that sits at the foundation of modern manufacturing in ways most consumers never consider. Naphtha is the raw material that refineries use to produce the solvents, polymers, and chemical feedstocks that flow into printing inks, flexible plastic films, adhesives, and the coatings that make modern food packaging possible [4]. Before the Iran conflict escalated, Japan imported approximately 40% of its naphtha from Middle Eastern sources [1][2]. That supply suddenly became unreliable.
The numbers tell the story starkly. Naphtha prices in Asia nearly doubled in the weeks following the Hormuz closure [1]. But price alone does not capture the tightness of the market. Asia's naphtha refining margin, the premium refiners earn over Brent crude, surged from around £80 per tonne before the conflict to more than £295 per tonne as disruptions intensified [2]. That margin expansion signals two things simultaneously: that supply is genuinely constrained and that buyers are competing aggressively for whatever volume they can secure.
The Ink on Your Fingers
Printing ink is perhaps the most visible casualty of this disruption. The Japan Printing Ink Makers Association's managing director, Shinichi Takei, offered a blunt assessment of what Calbee's monochrome shift signifies. "We believe Calbee's decision to limit its packaging to two colours reflects an effort to conserve resources in anticipation of future conditions," Takei said [2][3]. The phrasing is careful, but the message is clear: manufacturers are not just reacting to current shortages. They are battening down for the possibility that things could get worse.
Japan's government has insisted that naphtha supplies remain adequate [3], but industry sources paint a more uncertain picture. The country has been scrambling to diversify its naphtha sourcing, and the numbers show the effort. Imports of naphtha from outside the Middle East tripled in May 2026 compared with pre-war levels [2][3]. That surge reflects desperate rerouting of supply chains, with cargo now traveling farther and costing more, simply to keep factories running.
The dependency runs deeper than most people realize. Flexible plastic packaging, the kind used for everything from chip bags to candy wrappers, depends on naphtha at multiple stages. Naphtha-derived polymers form the plastic films. Naphtha-based solvents clean and process those films. Naphtha residues show up in the inks that print the designs consumers see on shelves. A single colorful snack packet, when you trace its materials back to the petrochemical plants that made them, can depend on naphtha at half a dozen points in its supply chain [4].
Beyond Calbee: A Wider Squeeze
Calbee is the most visible example, but it is far from alone. Foodmaker Mizkan, which produces the fermented soybean snack natto, suspended sales of four products on 1 May and raised prices on others due to a shortage of polystyrene containers [1][2]. Polystyrene, like printing ink, traces back to petrochemical feedstocks derived from oil. When naphtha gets expensive and scarce, every product in that chain faces pressure.
Other companies responding to the same squeeze include processed-meat manufacturer Itoham Yonekyu, which is considering simplifying packaging designs to use less ink [2]. A beverage manufacturer removed printing from 15 probiotic drink products entirely [2]. Toto, best known for its bathrooms, suspended orders for prefabricated modular bathrooms because the plastic components became too expensive to produce [2]. Gyoza no Manshu stopped selling frozen take-home dumplings because plastic tray shortages made the product uneconomical [2]. Each decision reflects the same underlying math: when the raw materials that go into packaging become prohibitively expensive or simply unavailable, companies are forced to make choices that would have seemed unthinkable a year ago.
Japan's strategic oil reserves have reflected the strain. They fell from 254 days of domestic demand to just 205 days by 8 May 2026, covering approximately three weeks of national consumption [2]. The government has moved to reassure the public that essential supplies remain secure, but the gap between official reassurance and what companies are doing on the ground continues to narrow.
The Global Ripple
The Calbee story matters beyond Japan because the supply chain vulnerability it exposes is not unique to Japan. Calbee's shift to monochrome packaging has drawn attention to how heavily the global snack industry depends on naphtha-linked petrochemical supply chains [4]. Global food manufacturers including PepsiCo, Mondelez, Mars, Nestle, and Kellanova all rely heavily on flexible plastic packaging for significant portions of their portfolios [4]. If the Hormuz disruption persists, the same pressures hitting Japanese companies will arrive at their factories and packaging lines too.
The Iran war began in late February 2026, and while peace negotiations have reportedly been underway with hundreds of merchant ships caught on the wrong side of the Gulf, the underlying supply chain disruption has not reversed [2]. Even if a ceasefire were announced tomorrow, rebuilding the refined petrochemical supply chains that modern food manufacturing depends on takes months, not weeks. The monochrome snack packet may be with us longer than anyone would like.
Looking Ahead
The black-and-white packets will not last forever. Calbee has described the change as temporary, and Japan is actively working to broaden its naphtha supply base, looking to the United States and other regions outside the Middle East to replace disrupted flows [1]. But temporary has a flexible definition when supply chains are under structural pressure.
Shinichi Takei's framing of "conservation in anticipation of future conditions" hints at the real concern. Companies are not just managing today's shortage. They are preparing for the possibility that the world their supply chains were built in has changed in lasting ways. Whether that change is a prolonged regional conflict, a permanent restructuring of Middle Eastern energy routes, or simply higher baseline costs for the petrochemical inputs that modern packaging depends on, the snack aisle may never look exactly the way it did before February 2026.
For now, the color is gone from some of Japan's most beloved snack packets. It is a small loss, easily noticed, but it points to something larger: a reminder that the systems supplying everyday products are more fragile, and more geopolitically entangled, than most consumers ever stop to consider.