The word "substrate" refers to a surface or material on which something can grow or attach. It is like a foundation or base that provides support or nourishment for something else to develop or exist. Full definition
This equipment has multiple coating technologies, i.e. slot die and microgravure coating, two independent drying sections, can run a variety of substrates of interest at industrially relevant speeds, and has spaces for metrology and characterization. (h2awsm.org)
What difference does it make for you when you use other types of substrates for your painting, such as paper, wood or canvas? (artefuse.com)
Furthermore, ultra-thin, self - assembled layers on substrates of different surface energies were investigated on their morphology and ion conductive structure for modeling polymer structure in fuel cell electrodes. (european-mrs.com)