20 Types of dye materials are selected. Most of them are plants, including flowers, fruits and roots. Two are insects. Two types of mineral are used as mordants.
English: Iron(II) sulfate
Chemical formula: FeSO4
Iron(II) sulfate, also known as ferrous sulfate, is a type of iron salt that is used for a variety of applications. It is commonly used as a nutritional supplement to treat iron-deficiency anemia, as it is a source of iron that can be easily absorbed by the body.
Ferrous sulfate is available in different forms, including tablets, capsules, and liquid solutions. It is generally considered safe when used as directed, but like all supplements, it can cause side effects in some people. Common side effects include constipation, diarrhea, nausea, and stomach upset.
In agriculture, ferrous sulfate is used as a fertilizer to provide iron to plants that require it for proper growth and development. It can also be used to correct iron deficiencies in soil, which can lead to stunted growth and poor crop yields.
Ferrous sulfate can be used as a mordant in the dyeing process to create certain colors on fabric. It is particularly useful for creating darker colors, such as black, gray, and navy blue. It has a strong affinity for tannins, which are found in many natural dyes. When the fabric is treated with ferrous sulfate before being dyed, the tannins in the dye are attracted to the ferrous ions in the mordant, creating a deeper, more saturated color.
It should be noted that while ferrous sulfate can produce beautiful and long-lasting colors, it can also be toxic if ingested or inhaled in large amounts. It is important to handle ferrous sulfate with care and to follow appropriate safety precautions when using it in the dyeing process.
2. Lac bugs
6. Connected shell
8. Huai Mi
9. pomegranate peel
12. winter green
14. onion skin
18. five companions
19. black bean coat