This Fünf Millionen Mark Gutschein, or five million Mark voucher, was issued by Friedrich Bayer & Company. Design includes a cartouche containing a winged lion with caduceus and globe as well as the Bayer logo. The…

This Fünf Millionen Mark Gutschein, or five million Mark voucher, was issued by Friedrich Bayer & Company. Design includes a cartouche containing a winged lion with caduceus and globe as well as the Bayer logo. By the…

This Fünfhunderttausend Mark Gutschein, or five hundred thousand Mark voucher, was issued by Friedrich Bayer & Company. Design includes a cartouche containing a winged lion with caduceus and globe as well as the Bayer…

Digitized content includes the title page and a lesson on the mixing of colored paints from Painting and Decorating Working Methods: A Text Book for the Apprentice and Journeyman House Painter and Decorator. Includes a…

Sample book with tints and suggestions on the use of Natural Certified Food Colors in beverages, confectionery, ice cream, and other food products.

Tin container of powdered henna pigment manufactured by S. B. Penick & Company. Henna is a dye prepared from the plant Lawsonia inermis, also known as the henna or mignonette tree. Whole henna leaves must be dried and…

Sample book for Naphtol AS dyes, used for "embroidery purposes, for effects in silk, woollen and cotton clothes, for curtains, underwear made of artificial silk, etc." Contains dyeing instructions and 70 mounted dyed…

Sample book for Palatine fast dyes, a trade name for metal-complex dyes where chromium is incorporated into the dyestuffs molecule by the manufacturer. The process for Palatine fast dyes was achieved around 1915 by I.G.…

Part II of a sample book from Farbenfabriken vorm. Friedrich Bayer & Co.—the first incarnation of the modern pharmaceutical company Bayer AG established to manufacture and sell synthetic dyestuffs—containing mounted…

Contains a listing of available para color dyes.

Part I of a sample book from Farbenfabriken vorm. Friedrich Bayer & Co.—the first incarnation of the modern pharmaceutical company Bayer AG established to manufacture and sell synthetic dyestuffs—containing mounted dyed…

Color print advertisement for synthetic indigo and other indigoid products manufactured and sold by the Dow Chemical Company. The advertisement features images of ancient Egyptian statues with accompanying text…

General view of a colorimeter used to analyze nitrogen dioxide at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. With regards to chemistry, colorimeters are used to…