GC Brand Guidelines: Tokyo’s 1921 “General Chemical” Lab, Mount Fuji & Glass Ionomer

Three chemists and a small lab in Ikebukuro.

GC began in 1921 as a small laboratory in Ikebukuro, Tokyo. The company’s own history, published for its 95th year in 2016, names three young university graduates as its founders — Kiyoshi Nakao, Yoshinosuke Enjo and Tokuemon Mizuno — and says they called it GC Chemical Research Laboratory. The letters stood for “General Chemical”: the founders, the book says, admired American companies such as General Motors and General Electric, meant to move on from dental materials to applied chemistry, and left the word “dental” out of the name on purpose. GC’s company profile gives its founding date as 11 February 1921.

The first goal was a Japanese zinc phosphate cement, at a time when, the history says, dentists in Japan relied on imports from American and European makers. The first product, Standard Cement, was rejected when it was shown to Tokyo dentists, and it never reached the market. GC says the lesson shaped its idea of making products for the people who use them, and that Nakao drew from it the company philosophy it calls “Semui,” a word taken from Buddhist teaching. A second product, Crystalline Cement, became the company’s first success in 1925.

The laboratory became a joint-stock company in 1934, with Enjo as president and Nakao as executive director, and in 1938 it moved to a new plant in Itabashi, Tokyo, about six times the size of the Ikebukuro works. The war years followed. GC’s history says that from 1940 raw materials could be had only by official request, and that Nakao and other makers formed an association for dental mercury to share out supplies; dental materials were classed as vital goods. Late in the war the industry’s associations were merged into a single state distribution-control company, and free trading ended. The company says Nakao kept GC out of military business, and that wartime cement, made with substitute raw materials, fell well below its normal standard. GC renamed itself in 1941 and resumed work on 16 August 1945.

Blue Band, Mount Fuji and glass ionomer.

After the war GC rebuilt around quality. Its history describes a visit from the occupation authorities’ officer for the dental industry, and says that after an American dental mission to Japan it reworked its products to American standards and launched them in October 1951 as the Blue Band series. The company took the name GC Chemical Industrial in 1946 and GC Dental Industrial in 1973.

The defining move came in the 1970s. GC bought land in Oyama, Shizuoka, at the foot of Mount Fuji, and opened the Fuji-Oyama factory there in 1976. Its history says the factory began making a “Fuji” series of products, led by the glass ionomer cement Fuji Ionomer, launched in 1977, and that Mount Fuji became “a symbol of GC”; the book shows the mountain itself in a Fuji Ionomer advertisement. The company timeline also lists the hard dental stone Fujirock in 1976. The vinyl silicone impression material Exaflex followed in 1978. In 1992 GC launched Fuji Ionomer Type II LC, which it calls the world’s first light-cured glass ionomer filling material. Its current Japanese website features ranges sold as G-ænial and Initial.

Expansion abroad began with a European branch in Belgium in 1972, a factory there in 1989 and a branch in Scottsdale, Arizona, in 1981. In 1990 GC merged with Coe Laboratories, the American dental company, which became GC America in 1992. The Japanese parent took the short name GC Corporation in 1991.

Quality management became part of the brand story. The trade magazine LMT reported in November 2014 that GC Corporation had won Japan’s Deming Prize in 2000 and the Deming Grand Prize in 2004, that GC Dental Products had won the prize in 2003 and GC Dental in Suzhou, China, in 2010, and that GC America had just become the first American dental company to receive it.

Design and documentation.

Dental materials companies sell to a narrow, expert audience, and their visual language reflects it. Catalogues and product pages tend to show the object itself: a syringe of composite, a capsule of cement or a cartridge of impression material photographed on a plain white ground, often beside the shade guide that tells a clinician which tone of tooth-coloured material to pick. Colour matters in this trade in a practical sense, because shades are part of the product.

The delivery system is part of the brand too. Makers present their materials in the form they reach the surgery — single-dose capsules, automix cartridges that fit a dispensing gun, paste-paste syringes and bottles of adhesive — and many give each range a short, memorable name that is printed large on the pack. Curing lights, mixers and dispensers add a second, equipment-led strand to many catalogues.

The other recurring image is the clinician at chairside. Companies show dentists and assistants at work, run continuing-education courses and publish clinical cases, so that the brand appears as a working tool rather than a consumer good.

Trade fairs remain central. The International Dental Show in Cologne and the Chicago Midwinter Meeting, run by the Chicago Dental Society, are where many makers launch products and build their stands, and those booths — product walls, demonstration chairs and hands-on tables — are among the most visible expressions of each company’s identity. This guide sets out what can be checked about each brand, and marks clearly what rests on the company’s own word.

Two letters, redrawn four times.

GC’s mark has changed several times. Its history shows a first logo from 1922, redesigns in 1936 and 1977, and the current logo, in use since 1991. That year the company introduced a corporate identity — philosophy, name, brand and a corporate colour — as part of a plan it called Vision 2000; the book does not describe the colour, and no official value is used here.

The company has stayed with the founding family. In October 2024 GC announced that GC Holding AG, based in Lucerne, Switzerland, had been set up as the group’s parent company and main shareholder, that Makoto Nakao was its chairman, and that Per Falk, a former pharmaceutical executive, had become chief executive; the announcement described GC as “run by the Nakao family for over 100 years.” GC International AG, founded in Switzerland in 2013, shares the Lucerne address. In Japan, GC Corporation is based in Hongo, Tokyo, and its company profile lists about 845 kinds of dental materials, machines and instruments.

GC says it was the first dental company to gain ISO 9001 certification, in 1994, and lists ISO 13485 in 2004. Its history says the GC R&D Center in Itabashi stands on the site of the 1938 plant.

For a design guide, GC shows how a company can turn a place — a factory under Mount Fuji — into a product name and a symbol. Compare Shofu, the Kyoto maker founded a year later, and Ivoclar, another dental materials company with a century of history. For this guide we use a deep blue, snow white and a cool grey with a sans, an unofficial interpretation; no product or logo is reproduced.

Keep GC’s identity on hand — save it to a board in the Made Good inspiration library.