Coloring pencil lead for synthetic pencil based on biopolymers blends

A polymer-based lead or refill for writing, drawing and/or painting tools, the polymer-based lead or refill comprising, based on a total weight of the polymer-based lead or refill:

• 5 wt. % to 48 wt. % of a polylactide binder;
• 2 wt. % to 45 wt. % of at least one polymer binder, other than the polylactide binder, having a flexural modulus inferior to the flexural modulus of the polylactide binder;
• 5 wt. % to 50 wt. % of at least one filler;
• 1 wt. % to 30 wt. % of at least one coloring agent, other than the at least one filler;
• and
• 3 wt. % to 40 wt. % of at least one slip agent and/or 3 wt. % to 40 wt. % of at least one wax;
• wherein a total amount of the polylactide binder and the at least one polymer binder is 20 wt. % to 50 wt. %, based on the total weight of the polymer-based lead or refill;
• and
• wherein the polymer-based lead or refill is extrudable.