What pigment is PB15?
Cu-Phthalo Blue
Cu-Phthalo Blue (PB15:3) is a beta form Copper Phthalocyanine Blue pigment offering high heat fastness, alkali fastness, acid fastness and solvent fastness properties.
What does PB15 3 mean?
PB15 in the pigment code of Phthalocyanine Blue – this colour has a few variations, the main ones being the Red and Green shades. PB15 refers to Phthalo Blue without a Green or Red bias; PB15:1 refers to Phthalo Blue Red Shade and PB15:3. refers to Phthalo Blue Green Shade.
What does Phthalo mean?
Phthalo – Phthalo is short for Phthalocyanine, which is a synthetic pigment of greenish-blue. Colors like Phthalo Blue and Phthalo Green are popular amongst artists for their intensity and tinting strength. The colors range from reddish to violet.
What does PB 15/3 mean?
PB15:3. beta copper phthalocyanine (1933, 1935) phthalocyanine blue.
What is the difference between phthalo blue and ultramarine blue?
Side by side, ultramarine blue (left) is very different than phthalo blue (right). If we mapped each color on the color wheel, we’d see that ultramarine tilts toward the violet side of the wheel, while phthalo shifts toward the green side. Instead of traditional phthalo blue, there are several alternative pigments.
What does Phthalo mean in paint?
Phthalo pigments are a family of blue and green synthetic organic pigments based on variants of copper phthalocyanine, a deep blue compound produced by the reaction of phthalic anhydride, urea, copper and ammonia. Phthalo pigments are transparent, highly staining, and reliably lightfast.
Is phthalo blue the same as phthalo blue?
Winsor Blue is made of an organic synthetic pigment, copper phthalocyanine. Alternative names are phthalo blue, monastral and intense blue. It has many of the same properties, including its intense richness of pigment and therefore excellent tinting abilities.
What is the difference between Phthalo blue and ultramarine blue?
What colors do you mix to make phthalo blue?
Step 1: Mix 1 part of Phthalo Blue (Green Shade) with 2 parts Quinacridone Magenta. The mixture will be correct when you perceive it to be the deepest blue without being described as purple. This is an approximate primary blue. Step 2: Mix 2 parts primary blue with 1 part Hansa Yellow Medium.
What makes a color Phthalo?
Phthalo pigments are a family of blue and green synthetic organic pigments based on variants of copper phthalocyanine, a deep blue compound produced by the reaction of phthalic anhydride, urea, copper and ammonia.
What did PB15 stand for on Queensland Railway?
Per Queensland Railway ‘s classification system they were designated the PB15 class, P representing they were a passenger locomotive, the B that they had three driving axles and the 15 the cylinder diameter in inches. The PB15s were in essence identical to the B15 class.
What kind of locomotive is the PB15 class?
The Queensland Railways PB15 class locomotive was a class of 4-6-0 steam locomotives operated by the Queensland Railways.
How does PB15 differ from other fingerprint colors?
PB15 differs significantly across manufacturers, primarily in hue (as suggested by the chart above), but also in tinting strength, lightness and hue shift. (It typically makes a large hue shift toward green from masstone to undertone, which means the hue positions in the chart are approximate.)
Is the lightfastness of PB15 watercolors good?
The ASTM (1999) rates the lightfastness in watercolors of PB15 as “very good” (II), though it has excellent lightfastness in manufacturer and my 2004 tests across all the brands listed above.
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