We use essential cookies to run the site and optional analytics cookies to understand how you use it. Read our privacy policy.

Skip to content

40 New Anniversary Oil Colours - Now Available Explore Collections

Michael Harding
All Pigments
Colour Index Code

PBK11

Mars Black

Chemistry
Iron oxide (Fe₃O₄)
Origin
Synthetic mineral.
History
A fast-drying, opaque, neutral black; non-carbon alternative.
Toxicity
Non-toxic.

Mars Black (PBK11) is Iron oxide (Fe₃O₄). In our watercolour range it is semi-transparent, yes granulation, average lightfastness.

Transparency
Semi-Transparent
Granulation
YES
Staining
Medium
Lightfastness
Average
PBK11: Questions & Answers

What is PBK11?

PBK11 (Mars Black) is Iron oxide (Fe₃O₄). Synthetic mineral..

What is the chemistry of PBK11?

PBK11 is Iron oxide (Fe₃O₄).

Is PBK11 toxic?

Non-toxic.

Is PBK11 lightfast?

In the Michael Harding range, colours using PBK11 are rated average for lightfastness.

Is PBK11 transparent or opaque?

PBK11 is semi-transparent.

Does PBK11 granulate?

In watercolour, PBK11 is granulating.

Which Michael Harding colours use PBK11?

PBK11 appears in 4 Michael Harding colours: Cosmic Blue, Vine Black, Cosmic Blue, Vine Black.

Michael Harding colours using PBK11

4 colours across both rangesLightfastness: Excellent
Michael Harding colours containing PBK11, with medium, transparency, lightfastness and granulation. Granulation applies to watercolour only.
ColourMediumTransparencyLightfastnessGranulation
Cosmic Blue
No. 252
OilSemi-TransparentExcellent—
Vine Black
No. 135
OilSemi-TransparentAverage—
Cosmic Blue
W227
WatercolourSemi-TransparentExcellentYES
Vine Black
W135
WatercolourSemi-TransparentExcellentYES
scroll for more →
Mix with

Complementary pigments to mix with PBK11

Opposite-family pigments that pair cleanly with PBK11 for neutrals, shadows and chromatic greys.

Open the Mixing Studio →

Product Information & Disclaimer

The information provided on this website is based on research and testing conducted by Michael Harding Art Formulas Ltd and is intended as general guidance on the characteristics and potential uses of our products in established painting practices.

While we take care to provide accurate and reliable information, individual materials, techniques, working conditions and applications can vary. Michael Harding Art Formulas Ltd cannot guarantee that any product will be suitable for every individual purpose or application. Users should carefully read all product labels, instructions and safety information and carry out appropriate testing before use, particularly when developing individual techniques or combining materials.

To the fullest extent permitted by applicable law, Michael Harding Art Formulas Ltd makes no express or implied warranties as to merchantability or fitness for a particular purpose and accepts no liability for any loss or damage, including indirect or consequential loss, arising from the use or application of its products.

Colour Representation

Colours displayed on this website and in printed materials are for guidance only. Their appearance may vary depending on screen settings, device, lighting conditions, printing processes and other factors, and may therefore differ from the appearance of the physical product.

For the most accurate representation of colour, texture and finish, we strongly recommend viewing a physical product sample or swatch in person before making a final selection or purchase. Where colour accuracy is important, please do not rely solely on digital or printed representations.

© 2026 Michael Harding Handmade Artist Oil Colours. All Rights Reserved.