Positive term and most important attribute for the colour of a wine in the context of a wine address and wine evaluation. Other terms, some of which are used in combination and vary according to wine type or wine colour, are bright, sparkling, brilliant, torch-bright, glossy, crystal clear, mirror-like and transparent. To determine the clarity of a white wine in particular, hold the tilted wine glass against a light source against a bright background. A clear wine always has brilliance, it shines even with darker colours.
A deep red wine cannot be transparent, of course, but it can be very clear. The highest level of this is also called black gloss. This was derived from a common method of determining clarity. The filled red wine glass is viewed against the light in front of a dark surface. Possible clouding would become visible by brighter reflections. An absolutely clear red wine, on the other hand, will appear black due to a lack of reflections. An earlier often used term for clear red wines with simultaneous colour depth is torch light (the ethymological meaning is not known, however).