Proven to be the best heating mediums

The specially formulated heat transfer fluids developed by BPI have been proven to be the best heating mediums available. They heat quickly and evenly, maintain the high temperatures needed for your tints, and are non-toxic. They help preserve the interior of your base tank and protect your heating element as their evaporation factor is almost nil. It is unwise to make any substitutions, which may corrode, evaporate quickly, or release toxic vapors.

In recent advertisements, some manufacturers are claiming that using water as a heat transfer medium is the best way to heat tints in a tinting system. This is not so, and needs to be addressed so that proper lens coloring can be achieved, and proper health and safety can be maintained in the optical laboratory.
To be effective, the heat transfer fluid temperature should be higher than the tint solution inside the tint tank. Tests conducted at BPI® have shown that as the tint solution nears boiling, the temperature differential between the heating fluid and the tint tank should be optimized at near 40°F. (To maintain a 205°F tint tank). This differential requires the heat transfer solution to be maintained at about 245°F. This temperature differential cannot be achieved using water open to atmospheric pressure as a heat transfer medium. The maximum temperature of water at boil is 212°F (100°C), thus making it difficult to achieve the proper tint tank temperature to assure proper color, fade resistance, and color stability.

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