Advert for Blackwell & Co's coloured & black printing inks
Medium: Print on paper
This is an advertisement for Blackwell and Company’s blank and coloured inks. This company not only supplied artists inks but also printing inks. Printing inks needed to be specially formulated because they were required to transfer colour from the press to the paper and dry very quickly to prevent smudging. Traditionally printers had used lampblack ink but from 1820, it was more economical to use carbon black; ink made from natural gas. The development of lithography enabled printers to produce very detailed and fine illustrations and coloured inks produced even finer images.