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First, the reaction of orpiment with light created a highly mobile type of arsenic called arsenolite. That mobilized arsenolite then found its way to an underlying layer of lead white paint and ...

A few years ago researchers already discovered that the gold effect in some parts of the painting was instead created using a mixture of orpiment (a yellow pigment of arsenic sulfate) and silver ...

Scientific investigations conducted in the 1950s identified the yellowish writing paste as a mixture of beeswax and orpiment (As2S3), with the boards possibly made from walnut (Juglans regia).

The research team sought to understand the presence of a form of arsenic known as As(V) alongside a yellow arsenic sulfide pigment called orpiment. Previous studies had shown that the conversion ...

From reproductive rights to climate change to Big Tech, The Independent is on the ground when the story is developing. Whether it's investigating the financials of Elon Musk's pro-Trump PAC or ...

Analyses revealed that the tablets, made of both wood and ivory, contained remnants of a yellowish paste that turned out to be a mixture of beeswax and orpiment, a yellow pigment composed of arsenic ...