Due to differences in users’ monitors, the colors presented are an approximation of the true color.
PR81-Rhodamine 6G
PB29-Ultramarine [Blue]
PR81-Rhodamine 6G
organic, fluorone dye
C28H31N2O3Cl
Rhodamine 6G is a staining reddish-yellow pigment that has fluorescent properties. It is extremely soluble in both water and alcohol. Fluorescent molecules absorb light at one wavelength and emit light at a longer wavelength.
Rhodamine 6G, like all fluorescent dyes, is not considered permanent, however it is reported to have high stability for a fluorone dye.
Rhodamine 6G is toxic, however it can be biologically inactive and hence non-toxic in a lake pigment form.
Rhodamine dyes are often used for microscopy in the biological sciences. Rhodamine 6G is often used as a laser dye.
PB29-Ultramarine [Blue]
inorganic
complex silicate of sodium and aluminum with sulfur
Na8-10Al6Si6O24S2-4 or Na6-8Al6Si6O24S2-4
Ultramarine is the standard warm blue, a brilliant blue pigment that has the most purple and least green in its undertone. It has a moderate to high tinting strength and a beautiful transparency. Synthetic Ultramarine is not as vivid a blue as natural Ultramarine. Ultramarine dries slowly in oil and tends to produce clean, though granular, washes in watercolor. French Ultramarine mixes well with Alizarin colors in oil and watercolor form to create a range of purples and violets. It can dull when mixed with white in acrylic form, but mixes well with other colors. The shade varies based on manufacturer. Considered a great color for glazes, it is not suitable for frescoing.
Ultramarine has excellent permanence, although synthetic Ultramarine is not as permanent as natural Ultramarine. It may discolor if exposed to acid because of its sulfuric content.
Ultramarine has no significant hazards.
The name for this pigment comes from the Middle Latin ultra, meaning beyond, and mare, meaning sea, because it was imported from Asia to Europe by sea. It is a prominent component of lapis lazuli and was used on Asian temples starting in the 6th century. It was one of the most expensive pigments in 16th century Europe, worth twice its weight in gold, and so was used sparingly and when commissions were larger. Ultramarine is currently imitated by a process invented in France in 1826 by Jean Baptiste Guimet, making blue affordable to artists and extending the range of colors on their palettes.
UPC Code: 4993899235195