The different hard hat colors help show at a glance what job everyone has ... Blue Hats Are For Technical Workers, ...

The company’s distinctive three-rib, heat-resistant fiberglass hard hat was developed in the 1940s. In the 1950s and 1960s, thermoplastics replaced fiberglass.

Different hard hat colors aren't just ... This is where the blue hat workers come in. Workers wearing blue hats are ... soldering large components together like fiberglass or carbon ...

Every day, thousands of workers across the country put on a hard hat as part of their work attire. And, while it may not be their favorite thing to wear, it’s an important piece of safety equ… ...