It's becauase the argument passed to the chr() method is out of the range. Want to learn more Python for Data Science? Head over to DataCamp and try their free Python Tutorial
The second product used in this project is Liquitex pouring medium. This is a low viscosity (very fluid), clear, and high gloss acrylic medium. It is about the consistency of warm honey; quite sticky also. It can ben used with your regular heavy body paint to make them flow easier, and create cool dripping effects.
Making the Egg Medium. Medium is what is mixed with dry powdered pigments to make paint. The egg medium is what makes this paint egg tempera. Prepared egg medium lasts up to three days in a cool environment. Some people add a drop of oil of cloves to help it last, but I have never found this necessary. You will need: 1  One very fresh egg, preferably organic (it really does make a difference).