Starting from observing the basic principles of pigment use in that era, I began to optimize all pigments and ultimately focused on substances with the above characteristics. There is no such substance in natural substances, but I obtained this pigment after special treatment with plant products. This process is achieved through chemical reactions. There is a plant dye that people talk about a lot, which is dragon blood from Malaysia, but I have excluded it. Because it lacks vivid colors and excellent color intensity. Please think about it, if dragon blood is used, in order to obtain bright colors, a large amount of dragon blood must be added to the paint, which results in the destruction of the composition structure and transparency of the paint. Because resin dyes can make paint appear glassy. And the pigment that was being used at that time only needed to be added a little bit, which would not change the sending properties of the paint, so dragon blood should be excluded. In addition, dragon blood is very prone to fading, and over time, the red color will gradually disappear. Dragon blood dissolves in alcohol. If a piece of cloth is dipped in a little alcohol to wipe the lacquer containing dragon blood, the red color will remain on the cloth, but this does not happen on Stradivarius guitars. After analyzing the spectra of Stradivarius lacquer, we found a large amount of metals used as colorants, and dragon blood cannot contain metals when used in its natural state. We have found that cinnabar is used as a pigment on some famous pianos, and it can be used in its natural state without the need for a fixative. But it lacks bright and eye-catching colors, making it easy to distinguish.

In some Guarneri Jesuits, another type of pigment is used, more accurately "Venetian Red", which has a somewhat blurry paint surface. By using metal fixatives, we can obtain the same ruby and warm orange colors as the Stradivarius back then, which also explains why these two colors were widely used back then. Among the widely used pigments, it is obtained by extracting safranin from the roots of the plant. When placed in an alkaline atmosphere (usually with potassium added to lime water), it reacts to a ruby color. The specific method is to first soak the mashed Chinese parasol roots in vinegar for 24 hours to remove gum and sugar, then rinse the vinegar on the Chinese parasol roots with clean cold water, air dry, and then heat them in an alcohol bath. When the water temperature increases, safranin is extracted. Filter the alcohol containing safranin, evaporate about 1/5 in a water bath to achieve concentration, and then add alkaline material to change its color. After the color becomes suitable, add metal salts such as aluminum salts, aluminum sulfate, etc. to fix the color. Place the alcohol in a water bath and heat it up until the crystallization of quercetin solidifies. Finally, these safranin can be processed into micro powder for use. Please note that all operations must be carried out in glass or ceramic containers. If it comes into contact with metal, especially iron, its color will become very unsightly.