"Paint" in all its various formulations is a confusing landscape at best. There isn't any compelling reason or mandate for manufacturers to describe exactly what their products consist of. One can gain some clues about content by reading what the recommended thinning or clean-up solvent is. Marketing and product liability play big parts here, which seems counterintuitive.
In really broad brush strokes the world of "paint" can be broken down into two categories. To make it yet more confusing there are also hybrids.
1.Water base or waterborne, which sound like the same thing, but that's not necessarily true, but both are typically thinned with water
2.Solvent base. This covers a lot of ground. Everything that's not water based is usually considered solvent based. Paint thinner is a solvent. "Hotter" solvents like lacquer thinner have different characteristics and health risks.
In essence, there are base polymers, which includes acrylic, latex, urethane, alkyd and many more. To these, appropriate solvents or carriers are added. Solvents are essentially the delivery vehicle and for the most part evaporate, catalyze or crosslink after application.
I've found that "paint stores" as they exist now, know most about products intended for architectural applications. Automotive paint supply stores know that category, which is a very different world, both in chemistry and intended end use. There's also an even more obscure supply chain that's geared toward wood finishing. Again, a whole different world from what one finds in Woodcraft, big box or similar. I'm not faulting any of them, but their target audiences are different, so knowledge across the board is limited, in my experience. A coatings chemist would be a better resource, but where does one find those?
All that to say...it's confusing from a consumer standpoint.
