Many customers will choose silver and gold ink printing in order to pursue beautiful appearance, but in the process of design, we should design the layout rationally according to the characteristics of art paper and printing process, not only to be beautiful and generous, but also to fully consider the characteristics of gold and silver ink and printing process requirements, so as to prevent printing defects that should not occur as far as possible. Gold and silver ink is an ink with high concentration of gold and silver by replacing pigment particles with gold or silver particles (usually copper, aluminium powder or copper, aluminium thin film). The greatest characteristic of gold and silver ink printing is that it can show the suspension and color formation of gold and silver powders after printing. It can ensure the stability of quality and color stability in storage. Gold and silver ink printing should be selected according to the characteristics of art paper. Generally speaking, gold and silver ink should be used on the local or color block in the field, while it is better not to design into gold or silver for very small script, positive script or level transition.

　　在制版設(shè)計(jì)過程中要思索到金銀墨的色序布置，以保證金屬色澤。還要思索金銀墨印刷對藝術(shù)紙的請求。假如藝術(shù)紙對油墨的吸收性很強(qiáng)，連結(jié)料很快被吸收掉，油墨中的金屬顏料會浮在藝術(shù)紙外表，失去光澤，附著不結(jié)實(shí)，以會零落。而酸性較強(qiáng)的藝術(shù)紙，易與金屬粉發(fā)作化學(xué)反響，致使金屬顏料變色，失去光澤。在藝術(shù)紙上印刷金銀墨時要先鋪底色墨，比方印刷銀色油墨時先鋪一層淡淡的白墨，這樣既能夠進(jìn)步銀墨層的光澤度，同時還可以增強(qiáng)銀墨在紙張上的附著力。有些產(chǎn)品在印刷金銀墨之后，還應(yīng)該思索UV上光或水性上光，或者覆膜，以避免金屬顏料氧化變色或者零落。

　　In the process of plate-making design, we should consider the color sequence arrangement of gold and silver inks to ensure the metallic color. Also think about the request of gold and silver ink printing for art paper. If the art paper absorbs ink very strongly, the linking material will be absorbed quickly, and the metallic pigments in the ink will float on the surface of the art paper, lose lustre, not firm enough to adhere, and even will fall off. The strong acidic art paper is easy to react chemically with metal powder, resulting in discoloration of metal pigments and loss of luster. When printing gold and silver ink on art paper, we should first lay the base color ink, for example, when printing silver ink, we should first lay a light white ink, which can not only improve the gloss of silver ink layer, but also enhance the adhesion of silver ink on paper. After printing gold and silver inks, some products should also consider UV or water-based polishing, or film coating, in order to avoid metal pigments oxidative discoloration or scattering.

　　金銀墨印刷請求特地的印刷處置工藝，金銀墨的耐久性普通比顏料粒子差，但是能夠運(yùn)用印刷涂層或上光層停止維護(hù)。用粉狀的金屬顏料制的油墨，在印刷機(jī)上都有變稠（厚）現(xiàn)象，而用濕的金銀漿狀顏料配置的油墨就比擬好。在印刷中，金銀墨具有低粘度的特性，適于在墨輥間傳送，使印刷過程比擬潔凈。對承印物來說，粗糙的藝術(shù)紙會阻止細(xì)小的金銀墨顆粒在紙張外表構(gòu)成金屬箔而降低了金銀墨的印刷效果。此外，運(yùn)用金銀墨印刷的作用主要是突出其金屬特征，由于其他油墨的不透明性會影響其金屬效果，因而，在布置印刷色序上，普通都請求將金銀墨放在后印刷。由于金銀墨的不透明性會招致補(bǔ)償過多的油墨，只要經(jīng)過運(yùn)用較多的油墨來完成理想的金屬效果，但這會招致油墨呈現(xiàn)不均衡的現(xiàn)象，給潤版系統(tǒng)帶來過多的擔(dān)負(fù)，惹起糊版和起臟等毛病。避免這些毛病的好方法是在一個顏色較淺的圖像上添加油墨，使其恰恰掩蓋住圖像。然后，增加墨量，并調(diào)理供水量，使其稍稍高于小值，從而防止非圖文局部著墨。為使金銀墨具有良好的印刷適性，選用的調(diào)墨油（調(diào)金油和調(diào)銀油）必需保證有足夠的粘度、良好的化學(xué)穩(wěn)定性，要有較好的透明性，枯燥固差性能，要保證調(diào)墨油與金銀粉能平均地混合，并能進(jìn)步金銀粉的成色性能，使金屬光澤和著色才能更強(qiáng)。

　　Gold and silver ink printing requires special printing process. The durability of gold and silver ink is generally worse than that of pigment particles, but it can be maintained by using printing coating or polishing layer. Inks made of powdered metal pigments tend to thicken (thicker) on the printing press, whereas inks made with wet gold and silver paste pigments are better. In printing, gold and silver inks have the characteristics of low viscosity, suitable for transmission between ink rollers, making the printing process comparatively clean. For prints, rough art paper prevents fine gold and silver ink particles from forming metal foil on the surface of the paper and reduces the printing effect of gold and silver ink. In addition, the use of gold and silver ink printing is mainly to highlight its metal characteristics, because the opacity of other inks will affect its metal effect, so in the layout of printing color sequence, the general request for gold and silver ink in the final printing. As the opacity of gold and silver ink will lead to excessive compensation of ink, as long as more ink is used to achieve the ideal metal effect, but this will lead to ink imbalance, bring too much burden to the printing system, causing paste and dirty and other problems. The best way to avoid these problems is to add ink to a lighter color image so that it just covers up the image. Then, increase the amount of ink and adjust the water supply to make it slightly higher than the minimum value, so as to prevent non-graphic local ink. In order to make the gold and silver inks have good printing adaptability, the selected toner oil (gold and silver toner) must ensure adequate viscosity, good chemical stability, good transparency, good dryness and poor solidity, ensure that the toner oil and gold and silver powder can be mixed equally, and can improve the color performance of gold and silver powder. Metal luster and colouring can be stronger.

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