We have published an interesting video in our gallery about a trial that the SustForest Plus project has been carrying out since 2018. Here we explain how a trial for the validation of the use of new resination stimulants in the exploitation system of Spanish pine forests is carried out at the ETS de Ingerniería de Montes, Forestal y del Medio Natural of the Universidad Politécnica de Madrid (as a partner of the SustForest Plus project). Specifically, the trial focuses on the characterisation of the effects of innovative stimulant paste formulations on resin production and plant condition. We will be publishing all the results of this trial in the coming months.