Richard Serra's Splash Series, created between 1968 and 1970, marks a pivotal period in the artist's exploration of materiality and process. This series consists of semi-sculptural works that Serra produced by splashing molten lead onto the juncture where the floor meets the wall, thus challenging traditional notions of sculpture. The act of pouring molten lead, allowing it to solidify and then peeling it off to reveal the shape formed by the force and gravity, exemplifies Serra's engagement with what came to be known as Process Art. This method emphasizes the creative process itself and the physical properties of the materials, rather than focusing solely on the final product​ (The Art Story)​.

Serra's innovative approach during this period was not just about the materials he used but also about the way he interacted with the space around him. By focusing on the "gutter" or the space between the wall and the floor, Serra redefined the spatial dynamics of sculpture, making the environment an integral part of the artwork. This series is considered a precursor to his later, more monumental works, which continue to explore the relationship between the artwork, the site in which it is placed, and the viewer's experience within that space​ (The Art Story)​.

The Splash Series was indicative of Serra's broader interest in how art occupies and transforms space. This interest in spatial relationships and materiality was further developed in his later works, where he continued to push the boundaries of sculpture and site-specific art. Through these explorations, Serra has become known for his ability to alter perceptions of space and engage viewers in a dialogue with their surroundings, thus leaving a lasting impact on contemporary sculpture​ (TheCollector)​.