What is "paynize"

Payne's process \Payne's process\ A process for preserving timber and rendering it incombustible by impregnating it successively with solutions of sulphate of iron and calcium chloride in vacuo. -- Payn"ize, v. t.

Paynize \Payn"ize\, v. t. [From Mr. Payne, the inventor.] To treat or preserve, as wood, by a process resembling kyanizing.

vb. (context dated transitive English) To treat or preserve (wood etc.) by a process resembling kyanization.