Indicators to indicate the degree of depolymerisation

An article comprising a polymer composition, wherein the polymer composition comprises:

• at least 0.01 wt. % to at most 10.00 wt. % of an indicator, indicating the degree of depolymerisation, or the degree of biodegradation;
• at least 0.05 wt. % to a most 25.00 wt. % of a base, a buffering agent or a mixture of thereof;
• and
• at least 65.00 wt. % to at most 99.94 wt. % of a degradable polymer;
• wherein the pKa of the base, and/or the buffer agent is higher than the colour transition range of the indicator.

A method for visualizing depolymerisation in an article comprising a polymer composition;

• comprising the steps of:
• incorporating an indicator in the polymer composition in an amount from at least 0.01 wt. % to at most 10.00 wt. % compared to the total weight of the polymer composition;
• and
• incorporating a base, in the polymer composition in an amount from at least 0.05 wt. % to a most 25.00 wt. % compared to the total weight of the polymer composition;
• wherein the pKa of the base, and/or the buffer agent is higher than the colour transition range of the indicator;
• and, forming the article from the polymer composition.