By all appearances, some label designs were often illustrated by amateur artists, giving them a charming folk art appeal. Many of the popular designs were crudely copied and the printing was often out of registration. Some, such as the constructivist style Crax Boy, were continually modernized, yet the adorable firecracker lettering remained.
Manufacturers would frequently attempt to appeal to American audiences by giving their fireworks macho names evoking power, patriotism and freedom. Space exploration was another popular topic of label design.
And then you get the occasional comical and odd illustrations such as Cat's Brand.
And others which are just charming for their raw, unpolished printing, design and nonsensical typographical oddities.
Clowns are a perennial source of fright.
And more firecracker lettering which appears like it was an afterthought in this design. The more modern Arrow label below fires up with some lightening type for their brand.
Letterology disclaimer: Be safe out there today folks and remember, "Lay on ground, Light fuse and Retire quickly!"