This site is community-supported. We may earn a commission (at no extra cost) when you buy through our links.

Back to Pigment Notebook

Permanent Red 2B (manganese)

PR48:4

Alternate Names

Rubine 2B

BON Red

Pigment Description

It is a great irony of life that so many things named "Permanent" are just the opposite. This color has moderate to inadequate lightfastness and may fade to a 5 in tints depending on the supplier. Surprisingly, it is found in three oil paints by major paintmakers.

Monona Rossol writes that this may cause methemoglobinemia and has more warnings about it in her writing on pigments which also apply to other forms of PR48 as well.

PR48:2 and PR48:3, which are variants of this pigment, fade terribly to ASTM V (the lowest and poorest lightfastness rating) in gouache.

Resources

PR48:4 pigment data from David G. Myers, The Color of Art Pigment Database, Artiscreation.com

Information about PR48 from Bruce MacEvoy, Handprint Guide to Watercolors,

Rossol, Monona. The Artist's Complete Health and Safety Guide. New York, NY : Allworth Press, 2001. The book is rather dated, updated information is available from her website.

Stats

Lightfastness

Fair, on the low end of decent, may depend slightly on brand

Not lightfast enough for us, as it is the low end of moderate. Some estimates put it around ASTM II. May fall to BWS 5

Transparency

Opaque

Toxicity

Potential Hazard, Use more caution

Little information. Lower concern citation from artiscreation.com however some sources note Manganese content. Treat all pigments and paints with studio safety protocols.

Chemical Name

Monoazo: Salt of 2-naphthol acid. There are other variants such as PR48:2 is Calcium BON Red, salt of 2-naphthol acid. PR48:3 is Strontium BON Red, also a salt of 2-naphthol acid

with PR48:4 (Permanent Red 2B (manganese))

No single-pigment Oil found with PR48:4

DISCLAIMER: Please note that we are not experts in health and safety and we are not toxicologists, please consult the proper experts. We are not liable for any issues that may arise from the use of our website or its contents. The information contained in this site is provided without warranty or guarantee of any kind. We do not necessarily endorse any other website that are linked from our site. For any important pigment specs, please reference the manufacturer details. If you discover errors or omissions, please reach out through our contact form. Thank you.

We value your privacy and won't share your email address.

Check out Paint List on YouTube

Follow Paint List on Instagram

This is an independent paint review site for artists that is powered by affiliate links. That means that we may make commissions on purchases that you make at no extra cost to you.

* Prices are approximate, vary by retailer, and are be subject to change. Please check the retailer's website for the most up-to-date price. These prices also do not include shipping, VAT, or any other fees. But we don't paint because it's cheap, do we? No, we paint for the love of it.

Disclaimer: This website does not make any warranties or guarantees about the completeness, reliability, and accuracy of this information. Any action you take upon the information you find on this website is strictly at your own risk. We will not be liable for any losses and/or damages in connection with the use of our website.