Article: Recent Advances in the Yellow Color Space

Mark Ryan, Marketing Manager with The Shepherd Color Company

Paint and coatings chemists, formulators, and color matchers face many challenges and options for coloring in the yellow color space. A wide range of pigment chemistries are available with different levels of opacity, durability, chromaticity, and economics. These four properties are often antagonistic to each other, forcing a compromise on two or more of these key properties. At the same time, historical pigments like lead chromate are facing increasing regulatory pressure and are being formulated out of products.

There are two recent advances in this critical color space to address the needs of high-performance coatings. The most impactful is the recently discovered and commercialized CI Pigment Yellow 227, known as NTP Yellow after its inorganic composition of niobium and tin in a pyrochlore structure. This bright middle-yellow color-space pigment has excellent chromaticity and opacity along with unmatched durability. To complement NTP Yellow, recent advances in the CI Pigment Yellow 216, known as RTZ Orange, have driven the color from a red-shade yellow to a true orange color. This chromatic and durable orange pigment is useful in its own masstone, but it excels as a way to add redness or “a+ value” to colors based on standard yellows.

The utility of these pigments becomes apparent when comparing them to the other high-performance alternatives. To match colors in the middle yellow color space before NTP Yellow and RTZ Orange required the use of high-performance organic pigments (PY154 or PY151) or Bismuth Vanadate (PY184). The organic yellow pigments are highly chromatic, but they lack opacity and exterior durability. Adding TiO2 increases the opacity, but reduces chromaticity and durability in some systems. Bismuth Vanadate yellows have better opacity and durability than the organic yellows, but they are a bright green shade. Adjusting the color to more common yellows involves tinting with organic pigments, which leads to lower durability. Tinting Bismuth Vanadate with inorganic pigments (PBr24 or PR101) preserves the durability, but with a reduction in reachable color space.

NTP Yellow solves that trade-off by providing highly chromatic masstone colors that also have high opacity and durability. Colors can be reached using the inorganic NTP Yellow that used to be compromised in either chromaticity or in durability. When the NTP Yellow is used in formulas with the RTZ Orange, a whole new swatch of colors can be matched with previously unattainable combinations of color, opacity, and durability. NTP Yellow and RTZ Orange expand the durable color envelope available.

Besides the outstanding color properties of the NTP Yellow and RTZ Orange, they are available in easily-dispersed forms that are compatible with solvent and waterborne systems. By removing the time-consuming, expensive, and variable pigment grinding step, the true high-performance nature of the pigments is available. By removing the chances of over-grinding and contamination and allowing the pigments to be rapidly incorporated into new systems, they truly become ultra-high-performance pigments. The NTP Yellow and RTZ Orange pigments are commercially available with Dynamix easily-dispersed versions from Shepherd Color as Dynamix Yellow 30C152 and Dynamix Orange 30C342.

View our webinar on the advantages of the NTP Yellow and RTZ Orange pigments.


Webinar: Innovation in Yellow and Orange Pigments

Pushing the Edge of the Durable Color Envelope

Webinar Presented by Mark Ryan, Marketing Manager with The Shepherd Color Company
Recorded on October 18, 2018


Pushing the edge of the durable color envelope comes down to giving chemists and formulators the pigments that are chromatic, opaque and durable. These three properties perhaps are hardest to achieve in the yellow color space.

This webinar will show the performance and advantages of the NTP Yellow and RTZ Orange pigments and how they can help you formulate your high-performance products.


Black 10C912 is also a new CI Pigment Brown 29 for use in the coatings industry.

It has a mean particle size of 1.6 microns and a TRS of 25%. Black 10C912 has a bluer masstone versus other IR-reflecting pigments.

High IR reflectance enables colored materials, even dark colors, to stay cool. This new black also meets numerous regulations.

Shepherd Color introduces Dynamix Black 30C941, a CI Pigment Brown 29 with a 29% Total Solar Reflectance.

It is also part of the Arctic range for coatings and can be used widely in color matches to maximize TSR. Black 30C941 has a mean particle size of 1.3 microns and is approved for various regulatory requirements. This is the ultimate blue-shade IR black for coatings. It has roughly the same color as 30C940 and has about 3-4% higher TSR. It is a higher ratio of Fe:Cr, which increases the blueness of the masstone, but with a slightly higher masstone L value.

The net effect is that it looks like a more neutral black and with a higher TSR.

This new black meets numerous regulations governing packaging, food contact, recycling and toys.

Just stir in Dynamix! Achieve 100% Pure Color Dispersions with Dynamix!

Get Pure Profitability, Pure Convenience, and Pure Consistency with Dynamix Stir-in Pigments! Typical applications include coil coatings, powder coatings, waterborne & solventborne coatings, and silicate & masonry coatings. Everyone benefits from Dynamix®!

From the CEO to the Plant Manager, from the Technical Manager to the Chemist, there is something to be gained by all.

Benefits include:

• Reduce total costs by over 20%
• Shorten dispersion cycle times from days to minutes
• Slash energy costs by more than 90%
• Make the same color every time
• Batch size, from the lab to plant, yields the same results
• Move production to any location in the world
• Speed up development time
• Can be added at any stage
• Stronger tint strengths & improved paint properties
• Reduce waste and cleanup

For more information see our new website