Shipping & Delivery  |  Purchase Orders  |  About Us  |  Contact Us Place order online or call 1-800-929-2431
Artist Supply Source
Product search » Pigments » Raw Materials » » » Rublev Colours Cobalt Yellow (Aureolin) 50 g - Color: Yellow

Rublev Colours Cobalt Yellow (Aureolin) 50 g - Color: Yellow

SKU : NAP-437-1005
The minimum order amount for this product line is $30.00
Rublev Colours Cobalt Yellow (Aureolin) 50 g - Color: Yellow
Discount table
Qty Price
 1   US$ 23.87 
 2   US$ 23.73 
 3   US$ 23.64 
 4-5   US$ 23.58 
 6-7   US$ 23.50 
 8-11   US$ 23.44 
 12+   US$ 23.36 
Price: US$ 23.87
US$ 23.87

See other product variations

Product description

Cobalt yellow (commonly called aureolin) is a potassium or sodium-substituted potassium cobalt nitrite. The compound was discovered in 1831 but not introduced as a pigment until after 1851. It is an intense yellow that has high tinting strength and low opacity. It is an expensive pigment sold by several manufacturers of artists' oil paints. However, the pigment never gained much popularity as an oil color and was much more widely available as a watercolor.

Water-Based Paint
In watercolors, cobalt yellow darkens and fades. It is a transparent, lightly staining, light valued, intense yellow pigment.

Oil Paint
In oil paint, cobalt yellow is transparent color with good tinting strength and is considered to be permanent.

Color Names
Current Names: Dutch: kobalt geel
English: cobalt yellow
French: jaune de cobalt
German: Kobaltgelb
Italian: giallo di cobalto
Spanish: cobalto amarillo

Origin and History
The history of cobalt yellow pigment has been well documented by M. Cornman in 'Cobalt Yellow (Aureolin),' Artists' Pigments. A Handbook of their History and Characteristics, Volume 1, National Gallery of Art (1986). It is generally understood that cobalt yellow was first synthesized by N.W. Fischer in 1831 as part of his study of nitrite salts. However, Fischer did not describe the compound specifically until 1848. Meanwhile, Saint-Evre, working in Paris, independently rediscovered the compound around 1851 and introduced it as a pigment. It first appeared in Windsor & Newton's catalogs in 1861. According to Gettens and Stout, the pigment was reputedly made popular by the American watercolorist Aaron Penly and the German artist Arthur Mühlberg.

According to Cornman, the principal method of preparing cobalt yellow was by mixing together solutions of cobalt salts with acetic acid followed by the addition of a concentrated potassium nitrite solution. Cobalt yellow would then slowly precipitate as a yellow crystalline mass.

Permanence and Compatibility
Cobalt yellow is slightly soluble in water and is darkened when mixed with sodium sulfide and caustic soda. In admixtures with organic pigments, such as lakes of cochineal, indigo, etc., it causes the decomposition of these; the organic colors become altered in hue and cobalt yellow becomes a brownish hue.

Oil Absorption and Grinding
Cobalt yellow absorbs a moderately high amount of oil; about 55 grams of linseed oil per 100 grams of pigment to make a paste. It has been noted in some manuals that the pigment works better as a watercolor than it does in oil, and is highly valued on that account among moist colors used by artists. According to Uebele it requires six parts of oil to four parts of the dry color on mixing and grinding.

Cobalt yellow is considered slightly toxic, and hence care should be used in handling the dry powder pigment to avoid inhaling the dust. Soluble cobalt compounds as well as cobalt metal may have a sensitizing effect. However, none have been reported during the experience of many years of handling cobalt yellow pigments.

Rublev Colours Pigment: Cobalt Yellow (Aureolin)

Pigment Information
Color: Yellow
Color Index: Pigment Yellow 40 (77357)
Chemical Name: Hydrated Tripotassium Hexanitrocobalt(II)
Chemical Formula: K3(Co(NO2)6).nH2O
CAS: 13782-01-9
ASTM Lightfastness Rating
Acrylic: II
Oil: II
Watercolor: II
Specific Gravity:
Refractive Index:
Oil Absorption: 55 g oil/100 g pigment

Product weight: 0.11 lbs

This product is shipped from our warehouse in Gretna, NE, USA.
This product is brand new and includes the manufacturer's warranty, so you can buy with confidence.
Please submit your product question using this form. All fields are required.

Your First name: *
Your email: *
Your phone: *
Product question:
Please don't mention your email and your phone in this field.
Submit question

Detailed images
Cobalt Yellow (Aureolin) 50 g
Cobalt Yellow (Aureolin) 50 g

See other product variations

Web Orders
24 hours a day, 7 days a week

Email Support
Contact Us

Telephone Customer Service
Mon-Fri: 9 a.m. to 5 p.m. EST
Toll Free: 1-800-929-2431
Tel: (616) 259-5711
Fax: (813) 944-4516

USA Address
S3 Stores, Inc.
2885 Sanford Ave SW #12717
Grandville, MI 49418

Canadian Address
S3 Stores, Inc.
27 Joseph St.
Chatham, Ontario N7L 3G4

Payment Methods
We accept all major credit cards
Purchase Orders
Combating eCommerce Frauds
Copyright © 2005-2018 S3 Stores, Inc. All Rights Reserved.    Terms of Use | Privacy Policy