Background

With the increasing severity of mold in various regions today, especially in the field of art, the preservation of canvases has become a major challenge for people to create; Moreover, pigments are not a cheap commodity in the market, which has led to a continuous decline in people's willingness to purchase pigments, reflecting the increasingly sluggish pigment market.

Figure1 Mouldy clothing.

“The harm of mold to textiles is long-lasting and diverse. Mold can decompose cotton, wool, and silk fibers containing nutrients such as carbon and sulfur into nutrients”. As shown in the picture, the problem of clothing mold is gradually becoming more serious.

For example, in the United States, art materials do not contain chronic toxicity and must comply with ASTM d4236, meaning that the product does not contain sufficient amounts of harmful substances to the human body (including children) Raw materials that cause harm or toxic effects will not cause acute or chronic harm to the human body. The corresponding standard in the European region is EN71.3. These two standards are currently internationally recognized for the removal of harmful elements from art materials related to oil painting materials, including aluminum, antimony, arsenic, barium, boron, cadmium, etc”.

Introduction

Curcumin is a natural small molecule polyphenol compound extracted from the dried roots and stems of plants in the ginger or araceae families, such as turmeric, curcumin, and turmeric. It has various pharmacological activities such as anti-inflammatory, antioxidant, and anti-tumor, and has low toxicity and few side effects.

Solution

“Oil painting pigments refer to pigments specifically used for oil painting production, which are formed by mixing and grinding mineral, plant, animal, or chemically synthesized pigments with color carriers. Oil painting pigments are a composite material and a carrier for creating art”.

Figure3 Different factors of effect on dye update (A)-The effect of dyeing time on dye uptake. (B)-The effect of bath ratio on dye uptake. (C)-The effect of Dyeing temperature on dye uptake. (D)-The effect of dyeing quality on dye uptake. (E)-The effect of pH on dye uptake.

From 5 charts above, we can reasonably arrive at the conclusion: “The dry and wet rubbing color fastness of dyed fabrics ranges from 3 to 4 levels, and the color fastness to sunlight can reach 4 levels. The color fastness to staining can both reach 4 to 5 levels, with only the lower fading level being 2 to 3 levels. From the perspective of dyeing effect, the jute fabric dyed with turmeric has a warm and soft color, elegant color, and broadens the natural yellow hue of jute fabric, which is beneficial for yellowing”.
The spatial expansion of hemp in the field of fiber culture and art.
Curcumin is a natural biological pigment with strong coloring power, anti mold and moisture-proof functions, which is both safe and healthy. It perfectly breaks through the main challenges faced by the current pigment market and will become a reliable pigment choice.

Advantages

If curcumin is successfully produced through synthetic biology methods, its yield will be significantly increased, which can greatly improve the position of this safe pigment in pigments. Compared with current production methods, it has the advantages of simple process and economic savings.

Figure 4 Comparison of advantages and disadvantages of curcumin solubilization.

Using the organic solvent,the curcumin will be squeezed out in the solvent.But after years of experience,this method apparently can't meet people's needs and will cost a great deal of material.

Practice

So we designed to use Escherichia coli as a biological substrate, introduce target genes, and construct a synthetic pathway for curcumin in the bacterial body, so that the engineering bacteria have the ability to efficiently produce curcumin. Through fermentation, efficient production is achieved, thereby reducing the cost and selling price of curcumin.

Figure 5 Effect of curcumin on the penetration of Aspergillus flavus.

Expectation

In the end, we hope to effectively solve the problem of excessive heavy metals in pigments, overcome the difficulty of canvases becoming moldy, create the desired pigment - bio pigment pigments, and verify the possibility in practice, so that all humanity can enjoy the healthy color world we have created;

Figure 6 Cultural relics protection.

References

[1] Zeng Xianghe. Isolation and Identification of Mildew Strains from Cotton Textile Cultural Relics [J]. Cultural Relics Protection and Archaeological Science, 2023,35 (04): 123-128. DOI: 10.16334/j.cnki.cn31-1652/k.20221202772.
[2] Guo Yu, Ren Difeng, Guo Ziyan, et al. Research progress in curcumin solubilization technology [J/OL]. Food and Fermentation Industry: 1-8 [2023-10-12] https://doi.org/10.13995/j.cnki.11-1802/ts.036980.
[3] Li Tianshuo, Xi Zuowu, Dong Wenjie, et al. The role of JAK1/STAT1/p21 pathway in curcumin induced cycle arrest of colon cancer cells HCT116 [J/OL]. Chinese Journal of Experimental Formulas: 1-11 [2023-10-11] https://doi.org/10.13422/j.cnki.syfjx.20232221.
[4] Peng Wenfang, Wu Jinqiao. Study on the dyeing performance of turmeric plant dyes on jute fabrics [J]. Wool Textile Technology, 2019,47 (06): 50-53. DOI: 10.19333/j.mfkj.2018070300604.
[5] Yang Youyang Study on the inhibitory effect of curcumin on Aspergillus flavus [D]. Hefei University of Technology, 2023. DOI: 10.27101/dcnki. ghfgu.2022.001031.