Cobalt Green Dark 100g
Rublev Colours Cobalt Green Dark pigment is a green cobalt zinc oxide, semi-transparent of limited hiding power discovered by Rinmann in 1780. Due to its permanence, it can be used in all painting techniques. The poor tinting strength and high cost of cobalt green kept it in limited use. Learn more about Cobalt Green Dark.
Rublev Colours Cobalt Green Dark pigment is a green cobalt zinc oxide, semi-transparent of limited hiding power discovered by Rinmann in 1780. Due to its permanence, it can be used in all painting techniques. The poor tinting strength and high cost of cobalt green kept it in limited use. Field called it, “chemically good and artistically bad.”
| Pigment Nomenclature | |||
| Common Name | Mineral Name | Chemical Name | Source/Origin |
| Cobalt green | None | Cobalt Zinc Oxide | United Kingdom |
| Common Names: | English: cobalt green, Rinmann's Green French: vert de cobalt German: Cobaltzinkoxidgrün, Rinmansgrün Italian: verde cobalto, verde di zinco |
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| Synonyms: | Cobalt Green Pale C.I. Pigment Green 19 Cobalt Green Cobalt Green Bluish Cobalt Green Deep Cobalt Green Light Cobalt Green Pale Cobalt Green Pure Cobalt Green Turquoise Cobalt Green Turquoise Light Cobalt Turquoise Deep Cobalt Zinc Oxide Cobalt Zincate Gellert Green Oriental Green Pigment Green 19 Rinmann’s Green Zinc Green |
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| Pigment Information | |
| Color: | Green |
| Colour Index: | Pigment Green 19 (77335) |
| Chemical Name: | Cobalt Zinc Oxide (Cobalt(II)-oxide-zinc(II)-oxide) |
| Chemical Formula: | CoO·ZnO |
| CAS No.: | 8011-87-8 |
| Series No. | 6 |
| ASTM Lightfastness Rating | |
| Acrylic: | I |
| Oil: | I |
| Watercolor: | I |
| Properties | |
| Specific Gravity: | 2.35 |
| Oil Absorption: | 34–37 grams oil / 100 grams pigment |
| Health and Safety: |
Skin contact may cause allergies, especially on elbows, neck, and ankles. Chronic inhalation may cause asthma. Ingestion may cause vomiting, diarrhea, and the sensation of hotness. May contain trace amounts of soluble cobalt, but should not be a hazard in normal artist use. Avoid dust, avoid spraying, don't use your mouth to point your brushes. Conforms to ASTM D 4326. WARNING: Exercise care when using dry pigments. Do not eat, drink or smoke. Avoid breathing dust. Use a NIOSH-certified dust respirator. Wash hands immediately after use. If the creation of dust is likely, wear protective clothing. |
History and Origin
The preparation of zinc oxide at the end of the eighteenth century made the development of cobalt green, also known as zinc green, possible. The Swedish chemist, Rinmann is credited with developing a process for making a compound of cobalt and zinc in 1780 that he published with the Stockholm Academy of Sciences. Arthur Herbert Church published Rinmann's process in his book, The Chemistry of Paints and Painting. According to Church, cobalt green was made with the compounds of oxides of zinc and cobalt by mixing them "with an alkaline carbonate" and then exposing the mixture to strong heat. After washing the sediment that resulted, the pigment was ready to grind. The pigment was always bluish-green in spite of the ability to widely vary the proportion of zinc to cobalt oxides in production. The compound that is formed is chemically joined.
Source
Cobalt Green is a synthetic inorganic pigment composed of an isomorphous mixture of cobalt zincate and zinc oxide heated at high temperatures which cannot be chemically separated. Paler tints require greater amounts of zinc oxide.
How cobalt green is made can be seen from webexhibits.org.
Permanence and Compatibility
Cobalt Green is considered permanent in all painting techniques.
Oil Absorption and Grinding
Cobalt Green absorbs a moderate amount of oil (34 to 37 grams per 100 grams of pigment), which slows the drying of oil paint and yet is a moderately fast-drying oil color. It disperses well in both oil- and water-based paints and is easy to mull by hand to a smooth paste.
Toxicity
Cobalt Green is not considered toxic, but care should be used in handling the dry powder pigment to avoid inhaling respirable dust particles. May contain trace amounts of soluble cobalt, but should not be a hazard in normal artist use. Avoid dust, avoid spraying, don't use your mouth to point your brushes.
Ecology
Very toxic to aquatic life with long-lasting effects.
| SKU | 427-3210 |
|---|---|
| Brand | Rublev Colours |
| Vendor | Rublev Colours |
| Processing Time | Usually ships the next business day. |
| Size | 100 g jar |
| Color | Green |
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:
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Below is an approximate guide to shipping costs for locations in Europe. Rates may change without notice.
| COUNTRY | ALPHA-2 | RATES PER PARCELS | CARRIER | |
| 0–10 kg | >10 kg–30 kg | |||
| Austria | AT | 11,50 € | 11,50 € | DPD |
| Belgium | BE | 10,95 € | 10,95 € | DPD |
| Bulgaria | BG | 20,25 € | 30,25 € | FedEx |
| Bosnia and Herzegovina | BA | 49,25 € | 49,25 € | DPD |
| Cyprus | CY | 21,80 € | 29,30 € | FedEx |
| Switzerland | CH | 25,85 € | 42,98 € | FedEx |
| Czech Republic | CZ | 12,00 € | 12,00 € | DPD |
| Germany | DE | 5,50 € | 5,50 € | DPD |
| Denmark | DK | 12,00 € | 12,00 € | DPD |
| Spain | ES | 17,48 € | 28,50 € | FedEx |
| Estonia | EE | 21,70 € | 21,70 € | DPD |
| Finland | FI | 17,48 € | 28,50 € | FedEx |
| France | FR | 14,60 € | 14,60 € | DPD |
| United Kingdom | GB | – € | – € | – |
| Greece | GR | 17,48 € | 28,50 € | FedEx |
| Croatia | HR | 29,25 € | 29,25 € | DPD |
| Hungary | HU | 15,90 € | 15,90 € | DPD |
| Ireland | IE | 17,48 € | 28,50 € | FedEx |
| Iceland | IS | 30,70 € | 62,40 € | DHL |
| Italy | IT | 15,90 € | 15,90 € | DPD |
| Liechtenstein | LI | 25,85 € | 43,00 € | FedEx |
| Lithuania | LT | 21,70 € | 21,70 € | DPD |
| Luxembourg | LU | 10,95 € | 10,95 € | DPD |
| Latvia | LV | 21,70 € | 21,70 € | DPD |
| Malta | MT | 21,80 € | 30,25 € | FedEx |
| Monaco | MC | 15,95 € | 24,30 € | FedEx |
| Netherlands | NL | 10,95 € | 10,95 € | DPD |
| Norway | NO | 25,85 € | 43,00 € | FedEx |
| Poland | PL | 14,90 € | 14,90 € | DPD |
| Portugal | PT | 15,50 € | 15,50 € | DPD |
| Romania | RO | 21,80 € | 30,25 € | FedEx |
| Serbia | RS | 49,25 € | 49,25 € | DPD |
| Slovakia | SK | 15,90 € | 15,90 € | DPD |
| Slovenia | SI | 15,90 € | 15,90 € | DPD |
| Sweden | SE | 15,90 € | 15,90 € | DPD |
| Turkey | TR | 27,30 € | 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
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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.
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Shipping Rates
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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.
