It was he who developed the modern quality pencil, defined standards for length and grades of hardness that still apply, and was also the first to make hexagonal pencils. He marked his pencils with the name A.W. Faber - and so the world's first branded writing implement was born.
Lothar was the first pencil manufacturer to travel to all important European countries, returning with full order books. With one eye to the future, he visited the New World, founding his first sales company in New York in 1849. There followed subsidiaries in London (1851) and Paris (1855) and agencies in Vienna (1872) and St. Petersburg (1874).
By acquiring a graphite mine in Siberia in 1856, he secured the company a source of the best graphite then available. Five years later he celebrated the centenary by opening a factory in Geroldsgrun in north Bavaria. This originally made school slates but later became one of the world's major producers of slide rules.
The A.W. Faber range now gained world-wide recognition, thanks to the international sales network that Lothar successfully set up in the course of a few decades. As a result, there were many cheap imitators. Lothar submitted a petition to parliament in 1874 "for the creation of a law to protect brand names"; he thus counts as a pioneer of manufacturers' rights. He also made a name for himself as a co-founder of the Bavarian Trade Museum in 1869 (now the Trades Institution), the Union Bank of Nuremberg in 1871, and the Nuremberg Life Assurance in 1844 (now the Nuremberg Insurance Group).
Surviving records also show that he had a high degree of social commitment. In 1844 he founded one of the world's first company health insurance schemes, and in 1851 one of the first children's kindergartens in Germany. He also financed the building of apartment blocks for his workers, schools, and a church, amongst other projects.
In 1867 Napoleon III sent a delegation of experts to Stein to study Faber's exemplary social foundations. In recognition of his services to society and the economy, Lothar von Faber, as he now became known, was given a life peerage in 1861 and made a hereditary baron in 1881. In 1865 he was nominated privy councillor to the Bavaria crown, that title also becoming hereditary in 1891.