Which semi-synthetic material, invented around 1908 by Jacques E. Brandenberger, is a classic example of measurable biodegradability?

Answer

Cellophane

Cellophane, invented around 1908, is made from regenerated cellulose and would degrade under the right environmental conditions, unlike the petroleum-based successors that followed it.

Which semi-synthetic material, invented around 1908 by Jacques E. Brandenberger, is a classic example of measurable biodegradability?
inventionChemistryenvironmentMaterialplastic