Cobalt Zinc Blue Watercolor Paint

As low as €8.50
In stock
Only %1 left
SKU
850-110

Cobalt Zinc Blue is a semi-transparent pigment with moderate tinting strength. When it dries, it appears lighter and less saturated. Although pigment particles are very fine, they flocculate, giving a grainy appearance in watercolor.

Rublev Colours Cobalt Zinc Blue is a semi-transparent pigment with moderate tinting strength. When it dries, it appears lighter and less saturated. Although pigment particles are very fine, they flocculate, giving a grainy appearance in watercolor. Differences in how the pigment is ground and mixed lead to considerable differences in its performance.

Numerous compounds have been called cobalt blue and while today it is commonly assigned to cobalt aluminum oxide, many other meanings have been ascribed to this name. Cobalt blue is cobalt aluminate blue spinel (Pigment Blue 28 or PB 28) with the chemical structure CoAl2O4 of which there are three basic modifications (Pigment Blue 36:1, Pigment Blue 36, and Pigment Blue 72), in which parts of the cobalt are substituted either alone or in combination with chromium and zinc. These variations differ in their tinting strength and hue.

ColorFormulaColor Index
Cobalt aluminate blue spinelCoAl2O4Pigment Blue 28
Cobalt chromite blue-green spinelCo(Al,Cr)2O4Pigment Blue 36
Zinc cobalt chrome aluminum spinel(Zn,Co)(Cr,Al)2O4Pigment Blue 36:1
Cobalt zinc aluminate spinel(Co,Zn)Al2O4Pigment Blue 72

The basic cobalt blue color, Pigment Blue 28, is produced by high-temperature calcination of cobalt (II) oxide (CoO) and aluminum oxide (Al2O4). The variations are produced by partial substitution of the cobalt by chromium and zinc, either alone or in combination with each other. The result is a large variety of cobalt blue pigments that differ in their tinting strength or hues (reddish or greenish-blue), depending on the exact chemical composition. The lighter-colored cobalt blue is prepared by the addition of zinc (II) oxide to the ingredients used for the basic pigment, forming Pigment Blue 72. Blue-green hues are produced by introducing chromium (III) oxide, partially replacing the aluminum (III) oxide in the basic cobalt blue, forming Pigment Blue 36.

All of them form the crystalline modification of spinel during calcination. The spinels are a class of minerals that crystallize in the cubic (isometric) crystal system with the oxide anions arranged in a cubic close-packed lattice and the cations occupy some or all of the octahedral and tetrahedral sites in the lattice. Spinel minerals form octahedral crystals that are usually twinned. They have an imperfect octahedral cleavage and conchoidal fracture. The hardness of spinel minerals is around 8 (chalk has a hardness of 2-3), specific gravity is 3.5-4.1 and it is transparent to opaque with a vitreous to dull luster.

Rublev Colours Cobalt Zinc Blue Watercolor

Rublev Colours Cobalt Zinc Blue Watercolor

Note: Colors swatches are shown in mass tone, at the top, mixed with an equal amount of water, and brushed out toward the bottom. All pictures of color swatches on this website are only approximations of the actual color of the watercolor paint. We have taken every care to match the color in these pictures on calibrated color monitors to the actual color. However, because of the wide variance in color monitors, the results you get may vary.

Composition and Permanence

Crimson Ocher
Color:Blue
Binder:Gum Arabic
Additive(s):None
Pigment Information
Pigment:Cobalt zinc blue
Pigment Classification:Synthetic inorganic
Colour Index:Pigment Blue 72
Chemical Name:Cobalt zinc aluminate spinel
Chemical Formula:(Co,Zn)Al2O4
CAS No.68186-87-8
Properties
Code:110
Series:5
Opacity:Semi-Transparent
Tinting Strength:Moderate
Staining:None
Granulation:Low
Flocculation:Moderate
Lightfastness:I
Permanence:A
Safety Information:Based on the toxicological review, there are no acute or known chronic health hazards with the anticipated use of this product. Always protect yourself against potentially unknown chronic hazards of this and other chemical products by avoiding ingestion, excessive skin contact, and inhalation of spraying mists, sanding dust, and concentrated vapors. Contact us for further information or consult the MSDS for more information.

For a detailed explanation of the terms in the table above, please visit Composition and Permanence.

Notes

Note: Some separation of pigment and medium may occur in Rublev Colours Watercolors and is a natural process when no stabilizers are added to paint to prevent this from occurring.

More Information
SKU850-110
BrandRublev Colours
VendorRublev Colours
Processing TimeUsually ships the next business day.
ColorBlue
Pigment TypeInorganic, Synthetic

Hazard Identification

Classification according to EC Regulation 1272/2008: This product is not classified as hazardous according to the CLP/GHS Directive.

Classification according to EC Regulation No. 67/548 or No. 1999/45: The material is not subject to classification according to EC lists. This product does not require classification and labeling as hazardous according to CLP/GHS.

Safety Designation

P280 Wear protective gloves/ clothing/ eye/ face protection.

P281 Use personal protective equipment as required.

P501 Dispose of contents/ container according to regional, national and international regulations.

Order Processing

If the Processing Time for items in your order is "Usually ships within 24-48 hours", your order will usually be processed within 48 hours of receipt Monday through Friday. Orders received during weekends and holidays will be processed on the next business (working) day. Orders with longer processing times will be shipped when all items become available.

Shipping Rates

Please add your desired items and the delivery address to your basket to determine the exact shipping costs and options. The table below provides shipping rates for different weights to the countries we ship to.

Carriers

We use the following carriers to deliver orders:

DPD Logo DHL Logo FedEx Logo

Below is an approximate guide to shipping costs for locations in Europe. Rates may change without notice.

COUNTRYALPHA-2RATES PER PARCELSCARRIER
0–10 kg>10 kg–30 kg
AustriaAT11,50 €11,50 €DPD
BelgiumBE10,95 €10,95 €DPD
BulgariaBG20,25 €30,25 €FedEx
Bosnia and HerzegovinaBA49,25 €49,25 €DPD
CyprusCY21,80 €29,30 €FedEx
SwitzerlandCH25,85 €42,98 €FedEx
Czech RepublicCZ12,00 €12,00 €DPD
GermanyDE5,50 €5,50 €DPD
DenmarkDK12,00 €12,00 €DPD
SpainES17,48 €28,50 €FedEx
EstoniaEE21,70 €21,70 €DPD
FinlandFI17,48 €28,50 €FedEx
FranceFR14,60 €14,60 €DPD
United KingdomGB– €– €
GreeceGR17,48 €28,50 €FedEx
CroatiaHR29,25 €29,25 €DPD
HungaryHU15,90 €15,90 €DPD
IrelandIE17,48 €28,50 €FedEx
IcelandIS30,70 €62,40 €DHL
ItalyIT15,90 €15,90 €DPD
LiechtensteinLI25,85 €43,00 €FedEx
LithuaniaLT21,70 €21,70 €DPD
LuxembourgLU10,95 €10,95 €DPD
LatviaLV21,70 €21,70 €DPD
MaltaMT21,80 €30,25 €FedEx
MonacoMC15,95 €24,30 €FedEx
NetherlandsNL10,95 €10,95 €DPD
NorwayNO25,85 €43,00 €FedEx
PolandPL14,90 €14,90 €DPD
PortugalPT15,50 €15,50 €DPD
RomaniaRO21,80 €30,25 €FedEx
SerbiaRS49,25 €49,25 €DPD
SlovakiaSK15,90 €15,90 €DPD
SloveniaSI15,90 €15,90 €DPD
SwedenSE15,90 €15,90 €DPD
TurkeyTR27,30 €46,20 €FedEx


Note: Countries in RED type are not members of the European Union.


Postal Service

Shipping (EU and non-EU countries):

Up to 500 grams Tracked: 6,85 €

Up to 1000 grams Tracked: 10,45 €

Up to 2000 grams Tracked: 20,50 €


Tracking

For tracking details, please log in to your Natural Pigments account.

We track all orders where a tracked delivery service has been selected.

We will update your order with the tracking information if the shipping carrier provides a tracking number. You can locate the tracking number for your order in the shipping confirmation email you receive when your order is shipped. (Look for the email with the subject line "Natural Pigments: Shipment # xxxxxxxxx for Order # xxxxxxxxx.") You can also find the tracking number by signing into your account and visiting My Account Dashboard under Recent Orders.

VAT for Orders within the European Union

VAT is not included in prices unless specified on the website as VAT INCLUSIVE. VAT is calculated for Germany at 19% on both order subtotal and shipping cost and is added to the order grand total.

VAT, Duties, and Tariffs for Orders Outside of the European Union

VAT is not included in prices and totals unless specified on the website as VAT INCLUSIVE. Duties, tariffs, and customs broker fees are not included in the prices and totals on the website. These charges are in addition to what you will pay when ordering. These charges originate in the delivery country, so please contact your local customs for more information.

Shipping Rates

The rate charged for the shipping of your order is based on the weight of your products and your location. Before the final checkout page, you will be shown what the shipping cost will be, and you will have a chance to abandon your order if you decide not to place it.

Shipping Damage

For shipping damage, customers should file a claim with the carrier immediately. Any discrepancy, including wrong or missing items, should be reported to Natural Pigments within twenty-four (24) hours of receipt.

Back Orders

We do not accept backorders for out-of-stock items. If you order an out-of-stock item, we will email you when we expect that product to be available. You will be among the first to receive the item when it becomes available. Natural Pigments will not charge your credit card for out-of-stock items.

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Cobalt Zinc Blue Watercolor Paint
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