But they know exactly what it is, how it works, and how to reproduce the effects. Requiring a character to have special skills and tools doesn't stop it being technology. I don't know how to build a car engine, but I know it aint magic.Not really. When creating magic items, I always require my characters to obtain and expend magical substances and use spell slots to create it. Having a process doesn't make it a technology. I wouldn't allow a nonmagical barbarian character to create a magic item, but an artificer or wizard with the right tool proficiencies, supplies, and process could make it if they are high enough level and spend enough time making it and questing for knowledge how to make it.