In May of 1942 an order by the United States Government impacted the manufacture of crochet hooks by stopping nickel plating. In an attempt to keep manufacturing needlework tools, Boye developed a black plating process using hot oxide to coat steel needlework tools, including crochet hooks, and used this method to continue manufacturing from June 1942 until the United States Government halted production of all steel products in August 1942. Due to the short time of manufacture, “black” Boye crochet hooks are prized by crochet hook collectors in general and Boye hook collectors in particular.
"Black" Boye crochet hook in removeable vintage hook handle.
