Difference between Decal and Decalcomania

What is the difference between Decal and Decalcomania?

Decal as a noun is a design or picture produced in order to be transferred to another surface either permanently or temporarily. while Decalcomania as a noun is the process of transferring decorative designs onto surfaces using decals

We hope you now know whether to use Decal or Decalcomania in your sentence.