1 Dehydration. 2  Not staying hydrated with enough water during the day may be one of the big causes of leg cramps at night. 3  This is most likely due to fluid imbalances of electrolytes (mainly sodium, potassium, calcium, and magnesium).4  Overuse of the muscles, perhaps from exercising, gardening or other physical activities. Dehydration. 2  Not staying hydrated with enough water during the day may be one of the big causes of leg cramps at night. 3  This is most likely due to fluid imbalances of electrolytes (mainly sodium, potassium, calcium, and magnesium).
Lustre (mineralogy) Lustre or luster is the way light interacts with the surface of a crystal, rock, or mineral. The word traces its origins back to the latin lux, meaning light, and generally implies radiance, gloss, or brilliance. A range of terms are used to describe lustre, such as earthy, metallic, greasy, and silky. Similarly, the term vitreous (derived from the Latin for glass, vitrum) refers to a glassy lustre. A list of these terms is given below. Lustre varies over a wide continuum, and so there are no rigid boundaries between the different types of lustre.
Glossy and Luster are both surfaces of photographic inkjet paper. Both are designed to mimic print paper surfaces available from traditional photo labs. For the most part, you will find glossy and luster papers as RC, resin coated, or photobase media. This is the paper type that looks and feels most like a lab print. Luster Surface. The luster surface is also called satin, pearl, and sometimes semi-gloss. The photographic industry term for luster is the E-Surface. Luster inkjet paper has a repeating textured surface. At certain angles it can look like the surface of an orange or automotive paint.