Standards for Copper‐Clad Laminates Available to Purchase

Specification by manufacturer's grade, restricts competition; company specifications proliferate test methods; both increase costs. BS.3888 was incompatible with foreign specifications. IEC Publication 249 promised internationally acceptable standards and led to the flexible approach to BS.4584 which allows for progressive additions to the range of test materials—now at seven—with a further seven in the foreseeable future.