These ribbons, upon closer inspection, appear to be two layers of machine-made fabric sewn together to form a single piece with one side puffed out like an arch in bridges, the “Alpine Loop” band that symbolizes the Apple Watch Ultra, which was just announced in the fall of 2022. The band is made of lightweight yet sturdy polyester fiber, the band is designed for outdoor activities by threading a metal hook through a hole in the fabric that expands in arch pattern, which prevents it from being pulled out in any direction. The fact that this intricate and delicate band is woven is astonishing.

The “Alpine Loop” uses 520 warp threads, which is far more than the number of threads used in ordinary fabrics, and this first process alone takes about six full days even for experienced employees.

After inspecting the heat treatment process on the first floor of the factory, I asked Tim Cook about his impressions of the company. “I love the the ability to scale something that is so intricate, something that is so detailed. And you know they’re making a lot of these as you can, tell but they’re doing it in such a high quality way. And the yields are very high.”

“They were very flexible, and willing to try new processes, new ways of doing things. This was the first time that this particular process was ever used. And so they have to be very nimble but that nimbleness has to be underpinned by great expertise. And they have that great expertise here. And I can’t stress enough the attention to detail and quality. These are the things that make the products look so great right out of the box.”

Apple prefers to use the term “supplier” over alternatives such as “subcontractor” because they believe in equal business partnership.

“What sets Apple apart [from other companies] is that they let us work as a team. If we have a problem, we spend time together to come up with a solution.” Seiji Inoue, managing director of Inoue Ribbon Industry, spoke from the opposite side of Cook’s statement.

In addition to bands for the Apple Watch, the company also produces handles made from woven paper for “Mac Pro” product packaging. Normally, nylon or other materials would be mixed into paper to give sturdiness, but Apple places importance on recyclability, so they need to make them from 100% paper. The team worked together with the Apple staff to find a way to meet these requirements, and when we introduced a manufacturer that could produce paper, they said, “Great,” and accompanied us to the manufacturer.

The first product they worked on was a band for the Apple Watch called “Woven Nylon.” It took four years to develop. At first, Mr. Inoue was fed up with the high quality requirements. Compared to other industries, the textile industry is not very strict about size control.

at some point the front-line workers became accustomed to Apple’s standards, and are now saying, “We have to do this much, don’t we?” and aiming for higher quality manufacturing. He added, “Apple taught me from scratch about quantification and other things. They taught me how to manage, how to make a table like this, how to do standard deviation like this, how to take data like this, and so on. You can’t learn so much even if you paid someone. But Apple shared all those knowledges sayin we are on the same team.”

Mr. Nobunari Sawanobori, the president of Teikoku Ink, which supplies white ink for the iPhone, once said, “The loss of learning through working with Apple is a bigger loss than the loss of orders from Apple.”

After working for so long with Apple, recently Inoue Ribbon Industry began to make proposal or provide supplement data when they work with other clients, Most of those clients are surprised and delighted.

Wealthy tech executives spending their fortunes on real estate or more imaginative adventures is a staple of Silicon Valley culture. Some buy islands, others build yachts longer than a football field or fund quixotic flying car projects. Mr. Ive’s fixation on a single city block, by comparison, seems modest.

At LoveFrom, he has tried to trust his instincts. Buying one building led to buying another. A discussion about a new yarn led to his first fashion apparel. Work with one client, Brian Chesky, the chief executive of Airbnb, led to meeting Sam Altman, the chief executive of OpenAI.

He bought it for $8.5 million and discovered its backdoor led to a parking lot encircled by the block’s buildings. He wanted to turn the parking lot into a green space, but learned that he needed to own another building on the block to control the parking lot. So a year later, he bought a neighboring, 33,000-square-foot building for $17 million.

Mr. Weeks cringed. San Francisco’s commercial real estate market would crash during the pandemic, and more than a third of its offices remain vacant. “I don’t really think you need to do that,” Mr. Weeks told Mr. Ive. “I can get you office space.”

worries faded after neighbors met Mr. Ive. He offered to reduce some tenants’ rents, did free design work for others and won over Mr. Peskin, a frequent critic of development in his district, with his plans to preserve the existing buildings.

Over five years, Mr. Ive and Mr. Newson hired architects, graphic designers, writers and a cinematic special effects developer who work across three areas: work for the love of it, which they do without pay; work for clients, which includes Airbnb and Ferrari; and work for themselves, which includes the building renovation.

The project has given Mr. Elkann an appreciation for LoveFrom’s process. In January, he visited the firm’s studio for an hourslong meeting about the car’s steering wheel. He listened as Mr. Ive and others talked about the appropriate steering wheel length and how a driver should hold it. Ferrari’s chief test driver tested an early prototype of the wheel, which borrowed design elements from the company’s sports car and racecar history, to assess how it would perform. “Paying attention to the steering wheel in a car that you want to drive and what the physicality of what that means is something that Jony was very clear about,” Mr. Elkann said. He added that the result is “something really, really different.”