How To Make Pigment Green 7 For Dyeing?
Pigment Green 7, also known as CAS 72840-09-4, is one of the best-selling green pigments in the world, and it’s used in all sorts of commercial applications from textiles to paper to plastic, thanks to its exceptional tinting strength and stability (it doesn’t fade or change color over time). But if you need to make your own Pigment Green 7 at home, you might be wondering how it’s done. There are several methods available depending on what type of scale you need.
Calculate Your Needed Amounts.
For example, if you want to dye one pound of fabric, then multiply 1.5 oz. (approximately 0.56 cup) by how many pounds you want to be dyed and divide that number by two ounces. If you are dyeing two pounds of fabric, then you would use one and a half ounces of Pigment Green 7 (0.78 cups). Keep in mind that fabric can absorb more than one ounce of dye per pound, so experiment with different amounts until you get an amount that works best on your specific fabric. You may need to add more than just pigment green 7 as well if it’s not giving your desired results; small amounts of other dyes work best when trying out new combinations. As a general rule, try adding less dye than you think will be necessary at first. Adding too much dye could result in muddy colours or uneven colour distribution. As always, make sure to thoroughly mix all of your ingredients before using them. Always wear protective gloves and clothing when working with dye mixtures—even small amounts can stain skin or clothes permanently! Also remember that while pigment green 7 is generally considered safe to handle without any special precautions or protective gear, it should still be handled carefully because it is toxic if ingested or inhaled.
Determine Your Alumina.
Add 15g of sodium aluminate, as a dry powder or paste, to 200ml of distilled water. Stir until dissolved and add it to your dye bath. This is usually enough pigment green 7 for most dyeing jobs. If you’re looking for a deeper colour in your finished fabric, increase your alumina by another 5g and repeat with another 200ml of distilled water. As with any pigment green 7 recipes, feel free to adjust based on experience; there’s no hard-and-fast rule here. If you’re new at dyeing then don’t worry about testing; just use 20g of sodium aluminate per 200ml of distilled water as a base and adjust from there if necessary. If you have leftover pigment green 7, seal it in an airtight container and store it out of direct sunlight. The shelf life depends on how much moisture is left over but generally speaking, one batch will last anywhere between six months and two years. Once opened, transfer any unused pigment into a smaller container that can be sealed completely so that no moisture can escape (such as an old film canister). If stored correctly—that is to say away from heat and light—the colour will not fade significantly over time. However, all dyes are affected by ultraviolet radiation so keep that in mind when planning dyeing projects around your location’s weather patterns.
Prepare Your Melanin.
Melanin is an incredibly powerful natural pigment that is found in everything from hair and skin, to eyes and blood. If you are interested in making pigment green 7, you must have a source of natural melanin (pigment green 7 pigments) so your dye will come out as expected. While there are many chemical processes for producing industrial pigments, natural melanin is produced by two specific fungi – Atrium ferrugineum and Piptoporus betulinus. These organisms produce different types of melanin depending on where they grow. To extract these pigments from these fungi, you first need a supply of animal or fish hides (tanned leather) or trees containing tannins, including oak bark and pine wood chips. Once you have your source material, place it into a pot of water and boil it for 2-3 hours. The result should be around 1 litre of black water with pigment sediment at the bottom. Use cheesecloth to strain out all but 0.5-1 litres of liquid and store in glass bottles until ready to use.
What Is Natural Pigment? Before we can start talking about how to make pigment green 7 using natural sources, we need to understand what exactly constitutes natural when referring to dyes or other colouring agents.
Stabilize With Bentonite Clay.
Bentonite clay has strong absorbing properties, making it a leading pigment green 7 manufacturer choice as a pigment green 7 dye base. Most synthetic green pigments are produced using bentonite clay. If you’re looking to make your synthetic green dye, use bentonite clay and let it absorb the chemicals you plan on adding. For example, if you plan on using copper sulfate, let it sit in your bentonite clay overnight or until all of your chemicals have been absorbed. This process can take anywhere from several hours to several days depending on how much chemical dye base you use and how porous your bentonite clay is. To learn more about making your pigments and dyes at home check out our overview of natural colourants here! To produce natural dye bases such as pigment green 7, one must first harvest raw materials like malachite ore (CuCO3(OH)2). Malachite ore must be processed into malachite concentrate (CuCO3·Cu(OH)2), which then needs to be dried.
