The secret behind NHT Violet Glass’ superior preservative properties is its distinct color. Allowing light in the violet spectral range to pass through (Ultra Violet, UV), but blocks all other visible light. The result is a deep violet glass container that is 10-20% thicker than traditional glassware, making it truly feel like a premium product. All NHT Violet Glass is European-made, and receives both hot and cold coating during production to offer maximum protection against scuffs and scratches.

This is not the first time this technology has been used for preservation, mankind has long tried to protect its most valuable products against the damaging effects of visible light. The ancient Egyptians, for example, preserved their most precious substances in gold and violet jars, meaning that the use of violet glass dates back to 3,000 BC. Some of the liquids stored in these vessels have been recovered in modern times and found to be largely unchanged.

Even today, the same principles are widely used, not by blocking visible light, but by increasing invisible light. The antibacterial power of UV light (high-frequency invisible light) is often used to sanitize in medical and food preparation industries. IR light (low-frequency invisible light) is often used when the heating properties of light are desired, but the damaging effects of visible light are not acceptable.

Why is violet glass not used in all modern products? 

The cost of making glass that can block visible light is expensive, and often not deemed worth the investment for an inexpensive product that is used quickly. Manufacturers of high-grade oils, candles and perfumes, however, often recognize the value of violet glass, and their customers enjoy the benefits of a product that retains its quality for much longer. By making this violet glass available for direct purchase from Natural Healing Tools, the power to better preserve their products naturally is now in the hands of consumers.

Should NHT Violet Glass be recycled? 

Our glass can be recycled but why? All our products are jars and bottles are dishwasher safe. Hand-wash is recommended for the plastic lids for the screw on bottles. If the original use you purchased the storage solution for is no longer - then use for something else! NHT Violet Glass look beautiful as a flower vase, holding cotton balls, or other non-light sensitive uses.