Invisible ink is specially produced for pressurized inkjet printers, designed to print images that only reveal their patterns under a special ultraviolet light. Invisible writing ink allows for handwritten text or graphics that are clear and highly invisible; the most crucial aspect is that only the person who prints or writes knows what it is, with others unable to see it. Of course, this is entirely thanks to a magical ultraviolet light, which allows your invisible text or graphics to be revealed!Only when the wavelength is3650Under the illumination of the ultraviolet light (this light source is safe and does not harm the human body), the printed text or images can be seen. "";Aquatic printing invisible inkHaveBlackSlashBlueSlashRedSlashYellowSlashlight blueSlashLight redIt is used in printers with piezoelectric nozzles and can only be used on ordinary printing paper. If it is used on matte color inkjet paper, the effect will be better. You can print any images or text according to your preferences. The print is colorless, but it will become colored after being exposed to a UV lamp. It is not waterproof."";

Water-based invisible inkThis ink is used for writing with cotton-core felt-tip pens. The writing you create is invisible to the naked eye, but it becomes visible under UV light, showing a green font. This type of ink is not waterproof and is suitable for ordinary writing paper."";

OilyInk for seal (black)SlashColorful（Not invisible ink），BlackSlashBlueSlashRedSlashYellowCan be applied to various media such as glass, plastic, wood, paper, etc., dries quickly, water-resistant.