A myriad of benefits


Glass flakes were introduced to the effect pigment market in the 90's as a new type of substrate, but it was not until 2001 when Glassflake introduced thin glass flakes that they started to gain wider approval. Glass flakes are now extensively used in both cosmetic and industrial applications as a substrate for various pigment types.

Glass flakes or borosilicates, as they are often referred too, are a unique substrate. Unlike natural micas and synthetic micas they have a completely planar and smooth surface and are completely transparent. These properties make them an ideal substrate for effect pigments which when coated with metal oxides display high brightness, colour purity, and high chroma.

Thickness and composition are critically important in such applications as effect pigment substrate. As an example, our cosmetic grade glass flake product has a nominal thickness of 1.0-1.3 microns. In turn, for automotive coatings thickness should be below 500nm. The deviation of thickness also plays an important part: if the deviation is too large, then the resulting pigment will appear uneven. The composition plays a vital role, firstly the glass composition has to be one that is chemically & heat resistant, along with surface chemistry suitable to accept metal or metal oxide coatings.

Our ECR borosilicate glass flakes meet regulatory acceptance levels for heavy metals and is tested to the most stringent of standards. We produce our glass compositions directly from mineral oxides allowing for rigid control of contaminants. The FDA CIR consider glass flakes based on borosilicate glass composition safe for use in cosmetics, in addition they are considered safe for use in polymers for direct food contact. They also meet the requirements for (EC) No 1223/2009.

Through our commitment to produce the highest quality cosmetic grade glass flakes, we are the preferred supplier to the effect pigment industry.

We offer a range of products for use as a substrate for effect pigments

ECR Glassflake

GF500 series – nominal thickness 3.5-5.5 microns

GF100 series – nominal thickness 1.0-1.3 microns


GF 100nm - nominal thickness 100nm

GF 350nm - nominal thickness 350nm

GF 500nm - nominal thickness 500nm

GF 750nm - nominal thickness 750nm

Each of the above products is offered in three particle size diameters: unmilled, milled and micronized. Please see Flake Dimensions for further information. Normally our product requires further particle diameter processing by either milling or grinding to achieve specific diameter fractions.

Heavy metal testing is carried out independently by ICP-MS using complete dissolution by Hydrofluoric acid with microwave assistance.