One is the direct irradiation of ultraviolet light, and the other is that the dye in black ink encounters some chemical substances with air oxidation, which makes the chemical structure of the dye change, and then causes the discoloration. The direct fading of ultraviolet light is naturally related to the level of ultraviolet light. We know that the photos made by indoor photo black ink are placed in the area without sunlight, and only bear the direct effect of some indoor lighting. In this kind of situation, if the dye in the ink is sun resistant grade 5 ~ 6, then its indoor storage time is two or three years (no visual effect is more serious fading), so it's not easy to use When encountering fading, we need to see if the photo is too strongly irradiated by ultraviolet light, such as whether the ultraviolet light of LED lamp in the advertising light box is beyond the standard, and one of the common reasons for the fading of lamp sheet is the application of fake LED lamp.
退色的另一方面緣故是染劑碰到了一些有空氣氧化氧化性的化學物質，當黑墨水打在有鍍層的物質上，上邊又覆到了含有膠原纖維的膜，假如鍍層或膜上帶有還原性化學物質都是會有退色狀況產生，例如在我們的手里一不小心沾有黑墨水，十分不易洗去時，用84一洗一定會洗去，也就是這個緣故，產生這類退色一般地說有下列特性：
Another reason for fading is that the dye encounters some chemical substances with air oxidation. When the black ink hits the material with coating, it is covered with a film containing collagen fibers. If the coating or the film has reducing chemical substances, there will be fading. For example, when we accidentally touch the black ink in our hands, it is very difficult to wash it off, we can use 84 to eliminate it This kind of discoloration has the following characteristics in general:
1、淺色系的或著中間色的界面覺得十分快并且時間有時候只幾個小時。
1. The interface of light color or intermediate color feels very fast, and sometimes it takes only a few hours.
2、這類界面就算是放到在黑暗中沒光的地區也會迅速退色。
2. This kind of interface will fade quickly even if it is placed in the dark area without light.
3、噴繪界面的色調褪一定水平就沒有褪了(表明反映了一部分)，詳細情況不一樣會稍有差別。現階段銷售市場一般的原材料鍍層基礎通關，燈片差一些，因為膜導致退色的狀況也是經常發生，這一點大家可根據一些實際具體檢測掌握。也有便是寫真噴繪界面退色,化水的緣故是因為在沒有等界面上的寫真黑墨水徹 底干躁以前就過膜。
3. If the hue of the inkjet interface fades to a certain level, it will not fade (indicating that it reflects part of the image). If the details are different, it will be slightly different. At this stage, China's sales market in general raw material coating basic customs clearance, lamp chip is poor, because the film led to the discoloration of the situation is often happening, this point you can according to some actual specific detection grasp. There is also a photo jet interface fading, the reason for water is because the black ink on the interface is not completely dry before the film.
