Opaque products Greater protection for light-sensitive substances.

Light transmission diagram: Comparison of results for the measurement of transmission (T%) between VITLAB® opaque and brown glass in volumetric flasks and bottles, in the wavelength range of λ = 200 to 900 nm. VITLAB® opaque provides better protection of the container contents from the effects of light, particularly in the UV range (see diagram below).

Light-sensitive substances require protection from the effects of light and particularly UV light so that they have a longer usable lifetime. In 2008, VITLAB manufactured the world’s first opaque volumetric flasks developed from specially pigmented plastic. The special pigments safely protect samples from the effects of light, while still maintaining high transparency to enable volumes to be set accurately.

The opaque volumetric flasks and reagent bottles safeguard the contained substances with a light protection factor of virtually 20. The absorption spectrum properties exhibited by the products are significantly better over the entire spectral range of 200 – 900 nm versus comparable brown glass products. VITLAB® opaque reagent bottles are especially effective below 560 nm. They have a maximum of 5% transmission at 560 nm, and less than 2.5% transmission measurable at or below 520 nm. The pigments in the opaque products exhibit a brilliant characteristic shine in the UV range starting at 400 nm.

In the UV range from 280 nm and in the upper visible range from 580 nm, VITLAB® opaque reagent bottles and volumetric flasks are thus significantly better than even high-quality brown glass containers. The differences between reagent bottles made of VITLAB® opaque and those of brown glass bottles can be more or less pronounced depending on the type of the glass, since the brown glass bottles are subjected to significantly greater production fluctuations.

The higher break resistance and lower weight are advantageous during daily use in the laboratory, and make VITLAB® opaque an attractive alternative to conventional volumetric flasks and reagent bottles made of brown glass.