Hello Customer (name blocked for privacy) and welcome to JustAnswer!
Thermochromatic printing is used in printing anti-counterfeit documents, checks etc. so I am not sure if they have any special requirements to let you have such a printing system. Printing adult or other images is not dependent on the printer, as long as you have the printing device you can print any image you want.
This company says:
"ELM PRESS, INC., through its Supplier Members, has the capability to provide any custom printing solutions, regardless of size, configuration or quantity, to include (but not limited to) the following:
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Ink colors: Stock standard and Pantone Matching System, including thermochromatic, laser safe, foil stamping, 4 Color Process or up to eight (8) spot colors. Coatings include: UV, aqueous, and varnish
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Below is their website, you may contact them and see what products they have available.
http://www.elmpress.com/uploads/28/PAGES/1510/
Hope this helps, have a great day!
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