A diffusion resistant lenticular element comprising a first support having thereon a lenticular array, the element having thereon a protective element comprising a second support having thereon an adhesive layer of an acidic polymer having a Tg less than about 80° C., the adhesive layer of the protective element being on the side of the first support which does not contain the lenticular array, the adhesive layer containing a laser-induced, cationic dye image. Another embodiment of the invention relates to a process of forming a diffusion resistant lenticular element comprising: a) contacting at least one dye-donor element comprising a support having thereon a dye layer comprising an image dye in a binder having an infrared-absorbing material associated therewith, the image dye comprising a nonionic dye capable of being converted to a cationic dye by means of an acid, with a lenticular element comprising a first support having thereon a lenticular array on the opposite side thereof; b) imagewise-heating the dye-donor element by means of a laser; c) transferring a dye image to the first support of the lenticular element; d) contacting the dye image with a protective element comprising a second support having thereon an adhesive layer of an acidic polymer having a Tg less than about 80° C., the adhesive layer of the protective element being in contact with the side of the first support which contains the dye image; and e) heating the element to cause the nonionic dye to convert to a cationic dye which is mordanted in the adhesive layer and to cause the adhesive layer to adhere the protective element to the lenticular element.