plastickými
Plastickými is the instrumental plural form of the Czech adjective plastický, used to describe nouns in the instrumental case. The sense of plastický includes “plastic” or “moldable” in a physical or material sense, as well as meanings related to the plastic arts and forms that have volume or structure. In practice, plastickými describes things that are formed, shaped, or characterized by plasticity, whether in material science, art, or design contexts.
Etymology and morphology: The word plastický derives from the Latin plasticus, via Czech and other European
Usage: Plastickými appears in contexts where the modified noun is plural and expressed in the instrumental
Related terms: The base adjective plastický contrasts with plastická (feminine) or plastické (neuter) in other cases
In summary, plastickými is a specialized grammatical form used to describe plural nouns in instrumental case