The Arsenic Green: Victorian Wallpaper and William Morris

In 1862, four children from one family in Limehouse, east London, died. A jury looked at the evidence, including testimony that the children had licked the green wallpaper, and returned a verdict of natural causes.

The wallpaper was a fashionable green. It was cheap, it did not fade, and it was made with arsenic.

This is the story of how a pigment that every paper-stainer wanted ended up on millions of walls, and why the most famous wallpaper designer of the era had more reason than anyone to look away.

A green that refused to fade

In 1775 the chemist Carl Wilhelm Scheele developed a new green. Scheele's green is copper arsenite, and the Cooper Hewitt museum notes that it was cheap to make and much less prone to fading than other greens. Printers used it on wallpaper through much of the nineteenth century.

A brighter, more stable variant arrived in 1814 under two names, Schweinfurt green and Paris green, according to a timeline in the Journal of Victorian Culture. Same idea, same arsenic, a more vivid result.

Chemistry was only half of the story. Economics did the rest. The tax on printed paper was repealed in 1836 and machine printing arrived in 1839. Lucinda Hawksley, author of Bitten by Witch Fever, reports that wallpaper production rose 2,615 percent between 1834 and 1874. By 1874 Britain was making more than 32 million rolls a year, per the same Journal of Victorian Culture timeline.

When a cheap, loud, durable green meets a booming mass market, you get green rooms. Lots of them.

The doctors start counting

Physicians noticed first. In 1857 William Hinds, a Birmingham doctor, reported symptoms linked to green wallpapers. The next year the press piled on. The Independent of 2 December 1858 claimed that one London manufacturer was using two tons of arsenic a week to print wallpaper, and that a single square foot held enough to poison five or six people. Treat that last figure as newspaper arithmetic, not lab data. The alarm it caused was real, though.

Some manufacturers moved. Woollams & Co stopped producing arsenical papers in 1859. The chemist Alfred Taylor wrote that wallpaper "now furnishes arsenic to the millions." By 1879 the arsenic was gone from the wallpapers of Buckingham Palace, and in 1884 Jeffrey & Co advertised arsenic-free papers as a selling point. All of these dates come from the Journal of Victorian Culture timeline.

Nobody agreed on how the poison reached you. The early theory was dust: pigment flaked off the wall and people breathed or swallowed it. In 1891 the Italian physician Bartolomeo Gosio showed that arsenic pigment combined with fungi in paste could produce a toxic gas. His discovery pushed the explanation toward fumes. Which route caused the most harm is still argued over, and this article does not settle it.

What did not change fast was the law. Hawksley notes that Britain never legislated against arsenic in wallpaper. The market sorted it out slowly. A Home Office report of 1900 described British wallpaper as "practically" free of arsenic.

The designer with a stake in the mine

Now meet William Morris.

Morris is remembered as the moral conscience of the Arts and Crafts movement. His Trellis wallpaper dates to 1864. Its early papers carried arsenical colours.

In 2003 Andy Meharg, a professor at the University of Aberdeen, ran a portable X-ray analyser over samples of Morris's early wallpapers. The University of Aberdeen reported that the green pigments contained arsenic, and that the findings would appear in Nature on 12 June 2003. Meharg's quote from the release is blunt: "This paradox is most disturbingly evident in his intimate associations with arsenic."

The paradox is money. The Morris family held shares in Devon Great Consols, a mine in Devon described in the same release as the world's largest arsenic producer of its day. Hawksley writes that Morris was a director of the company for four years from 1871. The Journal of Victorian Culture adds that dividends from the venture helped Morris & Co succeed.

So the man designing arsenic-green walls was also getting paid when arsenic sold.

What Morris said about it

He did not take the alarm seriously. According to Hawksley's account, Morris believed that "the doctors were bitten as people were bitten by the witch fever." As late as 1885 he argued that blaming wallpaper was a convenient excuse for illnesses doctors could not diagnose.

Not everyone around him agreed. Malcolm Morris, a consultant physician with no relation to William, described his own arsenic poisoning from an olive-green wallpaper in his book The Book of Health, published in 1884. He had initially dismissed the danger too.

Morris did change course. By the 1870s he had resigned from the mine and moved to vegetable dyes. The timing matters, though. The change came after the warnings, not before them, and Morris kept calling the fear overblown for years afterward.

It is hard to call him a villain. He sat on one side of a debate with a financial stake in the answer, and the evidence about gas versus dust really was messy. Still, the case is a useful reminder for anyone choosing colour today: the person selling you the pigment is rarely a neutral witness.

What a green from 1860 looked like

You can get close to the feel of those walls with five greens. The swatches below are not measured from any real wallpaper. They are an illustrative range from a deep green to a pale yellow-green, backed by an off-white ground.

Scheele's green also turns up in our history of yellow, trade and poison, where arsenic pigments and damp Victorian rooms get a shorter treatment. For other times chemistry upended colour, read how mauveine replaced Tyrian purple or how an accident gave us Prussian blue.

Why it matters if you pick colours today

Colour on a screen carries no arsenic. The lesson is about how colours get chosen.

• Cheap and stable wins. Scheele's green spread because it was affordable and lasted. Convenience beat caution for roughly a century.
• Test, do not assume. Museums now check old papers with X-ray fluorescence because looks tell you nothing. Cooper Hewitt says it stores its papers in a climate-controlled environment and that staff wash their hands often when handling papers made before 1900, since pigments are not routinely analysed.
• Ask who benefits. Morris had a stake in the answer. When a brand tells you a colour is harmless, check who is paying for the claim.

Screens do have their own version of this problem. A green that looks fine on your monitor may shift when you convert it for print or another display. Run your values through the colour converter and read up on colour spaces before you commit a green to a brand. And if you want to see how a specific hex behaves, #2f6b3a is a good place to start.

The takeaway

The Victorian arsenic green is a story about a colour people wanted more than they wanted to ask questions. It was cheap, bright and permanent. It covered millions of walls, mine dividends helped a famous design firm succeed, and the law never caught up.

Morris eventually walked away from arsenic. The pigment itself never faded. It disappeared when buyers and manufacturers stopped wanting it.

Sources

• Poisonous pigments used in famous William Morris designs, University of Aberdeen, 2003
• Arsenic and Old Wallpapers, Journal of Victorian Culture
• Lucinda Hawksley on arsenic wallpaper, The Victorian Web
• Scheele's green wallpaper, Cooper Hewitt, Smithsonian Design Museum