Abstract: The process by which materials are applied to a plastic fishing lure surface, thus producing a lure that possesses chromatic vicissitude as a result of water temperature fluctuations. At the onset of this process, a non-thermochromatic base layer of one or more colours is applied to the plastic fishing lure. This layer acts as the visual appearance of the fishing lure in the absence of temperature fluctuations. Clear extender is then used as an additive to the thermochromatic ink. This addition to the ink then allows the ink to be sprayed onto the surface of the lure. This ink-extender amalgam can be applied in multiple layers however; the bottom layer must have the least amount of hue saturation. Each layer thereafter would increase in hue saturation. Multiple hue combinations can be utilized. Once the desired number of thermochromatic layers has been applied, an ultra clear super high gloss lacquer finish is sprayed on to the exterior of all layers.