Johann Jacob Diesbach () (born around 1670 – died in 1748), also written as Johann Jacob von Diesbach, was a Swiss

pigment A pigment is a colored material that is completely or nearly insoluble in water. In contrast, dyes are typically soluble, at least at some stage in their use. Generally dyes are often organic compounds whereas pigments are often inorganic compo ...

and

dye A dye is a colored substance that chemically bonds to the substrate to which it is being applied. This distinguishes dyes from pigments which do not chemically bind to the material they color. Dye is generally applied in an aqueous solution an ...

producer known for first synthesizing a blue pigment known as

Prussian blue Prussian blue (also known as Berlin blue, Brandenburg blue or, in painting, Parisian or Paris blue) is a dark blue pigment produced by oxidation of ferrous ferrocyanide salts. It has the chemical formula Fe CN)">Cyanide.html" ;"title="e(Cyani ...

(i.e. iron blue or

Berlin Berlin ( , ) is the capital and largest city of Germany by both area and population. Its 3.7 million inhabitants make it the European Union's most populous city, according to population within city limits. One of Germany's sixteen constitue ...

blue).

Biography

Diesbach was from a noble family in

Bern german: Berner(in)french: Bernois(e) it, bernese , neighboring_municipalities = Bremgarten bei Bern, Frauenkappelen, Ittigen, Kirchlindach, Köniz, Mühleberg, Muri bei Bern, Neuenegg, Ostermundigen, Wohlen bei Bern, Zollikofen , website ...

Switzerland ). Swiss law does not designate a ''capital'' as such, but the federal parliament and government are installed in Bern, while other federal institutions, such as the federal courts, are in other cities (Bellinzona, Lausanne, Luzern, Neuchâtel ...

, who arrived in

Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...

around 1701. Between 1704 and 1706, Diesbach was working as a paint manufacturer in Berlin. He was using an extract of crushed cochineal insects, iron

sulphate The sulfate or sulphate ion is a polyatomic anion with the empirical formula . Salts, acid derivatives, and peroxides of sulfate are widely used in industry. Sulfates occur widely in everyday life. Sulfates are salts of sulfuric acid and many ar ...

and

potash Potash () includes various mined and manufactured salts that contain potassium in water-soluble form.

to create

cochineal The cochineal ( , ; ''Dactylopius coccus'') is a scale insect in the suborder Sternorrhyncha, from which the natural dye carmine is derived. A primarily sessility (motility), sessile parasitism, parasite native to tropical and subtropical Sout ...

red

lake A lake is an area filled with water, localized in a basin, surrounded by land, and distinct from any river or other outlet that serves to feed or drain the lake. Lakes lie on land and are not part of the ocean, although, like the much large ...

. One batch of the product unexpectedly turned pale pink. When he tried to concentrate the mixture, it turned purple, then deep blue. He sought out the seller of the potash,

Johann Konrad Dippel Johann Konrad Dippel, also spelled Johann Conrad Dippel (10 August 1673 – 25 April 1734), was a German Pietist theologian, physician, alchemist and occultist. Life Dippel was born at Castle Frankenstein near Mühltal and Darmstadt, and theref ...

, an

alchemist Alchemy (from Arabic: ''al-kīmiyā''; from Ancient Greek: χυμεία, ''khumeía'') is an ancient branch of natural philosophy, a philosophical and protoscience, protoscientific tradition that was historically practiced in Chinese alchemy, C ...

. Together, they realized that the reaction had occurred because the potash had been contaminated with bone oil. Neither Diesbach nor Dippel knew what exactly happened chemically, they had inadvertently created the first modern

synthetic pigment A pigment is a colored material that is completely or nearly insoluble in water. In contrast, dyes are typically soluble, at least at some stage in their use. Generally dyes are often organic compounds whereas pigments are often inorganic compou ...

. This was an important invention, because at that time, the available blue pigments were either not very successful or were not affordable for large scale use. The pigment was first mentioned in a letter, the first of several, from Frisch to the president of the Royal Academy of Sciences,

Gottfried Wilhelm Leibniz Gottfried Wilhelm (von) Leibniz . ( – 14 November 1716) was a German polymath active as a mathematician, philosopher, scientist and diplomat. He is one of the most prominent figures in both the history of philosophy and the history of mathema ...

, dated March 1708. By August 1709, the pigment was being referred to as "Preussisch Blau" and by November of that year, as "Berlinisch Blau".

References

{{DEFAULTSORT:Diesbach, Heinrich 18th-century German painters 18th-century German male artists German male painters 1748 deaths 17th-century chemists People from Bern 1670 births