These items are pre-formed, typically disposable receptacles designed to fit inside standard paint trays. They are usually made from plastic or coated paper and are acquired in large quantities to reduce per-unit cost. For example, a painting contractor undertaking a large residential project might purchase hundreds of these liners at once.
Acquiring such liners in volume offers several advantages. It provides cost savings compared to purchasing them individually or in small packs, reducing overall project expenses. This strategy ensures a ready supply on hand, minimizing downtime and disruptions due to running out. Historically, painters either cleaned trays after each use or employed makeshift liners, both of which were time-consuming and inefficient. The introduction of disposable liners, especially when bought in quantity, streamlined the painting process significantly.
