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.
Gloss Medium & Varnish The workhorse of the Liquitex mediums range. Gloss Medium & Varnish is an all-purpose medium that performs two functions. It can be used as a varnish and/or a fluid gloss medium. It improves adhesion of paint film and increases color depth, intensity, and gloss. It can also be used as a non-removable varnish to protect the surface and establish an even gloss sheen.