The 30W22C is a 22mm (22-400) black electrolytic tinplate (tin coated steel) cap with a white pulp/poly-vinyl liner, typically used with glass bottles, jars and jugs. This continuous threaded (CT) cap has a black exterior with a gold interior and gold knurled edge. Pulp/poly-vinyl lined metal caps are perfect for general use. The liner is construction of white pigmented polyethylene and polyvinylidene chloride (PVDC) on a bleached (white) Kraft paper. This general purpose liner is commonly used for food, beverage, medical and chemical applications packed at less than 120° F., including mild acids, alkalis, solvents, alcohols, oils and aqueous products; not recommended for active hydrocarbons or bleaches.
Electrolytic tinplate caps are highly sought-after metal closures that are sometimes referred to as tin coated steel caps, which are manufactured from 73 lb. - 80 lb. x .20 lb. electrolytic tinplate metal. The coatings on these caps are FDA approved and contain no heavy metals and the tooling meets ISBT standards. The metal itself has been sized, coated, varnished, and waxed. Tin plate steel is sometimes used in place of lightweight mirrors due to its shiny or lustrous like mirror appearance. Tin-plate steel is available in various color options such as, white, gold, red, and yellow and is more competitively priced than other options. Most tinplate steel metal caps are colored and have a uniform color and coating application on the closure surface area; whereas tin coated steel caps need a protective coating because they can corrode easily.
This information has been provided as a general guide. It is the customer's responsibility to select the proper container for product and application compatibility.