Pliny and the Greek geographer Strabo both noted that slaves making cloth with the material developed lung problems.

VOA: special.2009.11.17

You can also perform a test. Take some of the material and add enough water to it to make it seem like you are making bread.

VOA: special.2009.09.14

Then,she started making statues out of cement material and glass.

VOA: special.2010.04.14