After hundreds of years of silence, the market has begun to wind in recent years, but it has not yet reached the point of "wind and water". In addition to technical difficulties, a stable source of plant dyes is the main bottleneck.
As a non-hereditary heir of plant dyes, the author is also very anxious, and has developed a set of extraction equipment in the Jiangnan Branch of the China Textile Institute, but some raw materials are really problematic. The yield is also not enough.
Only again can look for companies that can produce the dyes needed. There are three main types of such enterprises: one is a food coloring production enterprise, one is a traditional Chinese medicine extraction enterprise, and the other is a plant extract enterprise. Although these three categories can be extracted, the equipment is the same, but the needs are different, the technical requirements are not the same, the original process is difficult to meet our requirements, but we have not given up, has been working hard.
At present, the most urgent is the red dye. The main known ones are:
Carthamus tinctorius L. safflower is an annual or transient herbaceous straight-root plant, and safflower is the only cultivar in the genus Safflower. Safflower is introduced to China as an important oil crop, which is the main value. The main ingredient is flavonoid safflower (SY). Very few red pigments are basically unstable. Studies have found that the thermal stability and heat resistance of safflower red pigment are very poor, and long-term light can lead to the degradation of safflower pigment, which is almost futile as a textile dye.
Madder red is also extremely difficult, the extraction and dyeing temperature is extremely high, it is difficult to match with other dyes, and it is currently impossible to obtain better dyes.
Hematoxylum is also the main variety of red dye, and the price is lower than the first two types, but the price increase in the past two years is obvious. The defect is also unstable in color fastness and has a purple tinge.
Finding and developing new red dyes became a top priority.
Through communication with relevant enterprises, research and development, there is finally a little progress. Just received a new red dye, the first dyeing experiment was done in these two days. The result is this:
The color is acceptable, but the stability is not enough, and there is a problem that the color matching with other red dyes is not ideal. The dosage is also relatively large, so the cost will be relatively high.
Dyed on silk and ramie fabrics. Compared with other dyes, the performance is similar, and it is necessary to conduct multiple tests to find out the rules in order to improve the process conditions.
For the convenience of recording, this new red dye was tentatively named "Ehong".
Experiments will continue later.
The dyeer Huang Ronghua xin ugly summer at the National Dyeing Hall on the outskirts of Beijing
