Tablets, capsules and caplets come in a multitude of shapes, sizes and coluors. They can be opaque, translucent and transparent.  Accurate colour measurement requires not only the right instrument, but the right sample holders for accurate and consistent sample presentation. HunterLab provides a wide selection of sample holders and can customize for your specific application. The preferred instrument type will largely depend on the sample type:

Opaque Samples are impenetrable by light and are best measured using a Directional 45°/0° reflectance instrument. This is the geometry that most closely matches how the human eye 'sees' colour.

Translucent Samples allow light to pass through, but only diffusely, so that objects on the other side cannot be clearly distinguished. Both reflective and transmittance measurement modes may work well depending on the translucency of the sample. 

Transparent Samples allow light to pass through with little or no interruption or distortion so that objects on the other side can be clearly seen. These plaques can only be measured using transmission instrumentation.

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