C glassflake is manufactured by the traditional bubble method, which has been used consistently since the 1950s to produce a standard specification glassflake material. This material and production method is globally recognised, given the wide spread use of the material among the largest manufacturers of protective coatings and performance composites for decades. In comparison with the more technologically advanced spun method, the bubble method offers a lower cost alternative, using the C glassflake composition. In using this older bubble method of production, the variance of flake thicknesses can be wider than that seen when using the spun method. C glassflake has been used to provide extended lifetimes of protective coatings, many of these coated parts remain in service for many decades after installation in the harshest conditions.