Kenner's packaging team used only the highest quality print available through the vintage era, and the Cromalins produced by the company's outside printing vendor were at the very top of this food chain. This Luke Hoth example is the epitome of why the company relied almost exclusively on Cromalins to assess design elements, the integrity of printing colors, text and other packaging features, right through the entire line.
This is the only known example of a ROTJ era Cromalin for Luke Hoth.
Cromalins are made from all 4 CMYK layers of the color separation film used to photograph original art, and add design elements to a final package. They are sandwiched together, then sealed to produce a print of much greater resolution than the era's standard (offset print) would allow.
While earlier iterations of cromalins were assembled by hand, and then sealed together, by the ROTJ era machines had taken over the task of adding ink to the separation layers.