Storage ink preparation and application examples (in)

2. Preparation of storage ink

Storage ink production process: The production technology of the storage ink directly affects its luminescent properties and application characteristics. Therefore, the process conditions must be strictly controlled and the following issues should be noted.

(1) The preparation of light-storing inks should be done in glass or enamel containers.

(2) The particle size of the light-storing material is selected to be as small as possible so that the light-storage material can be evenly distributed in the ink material.

(3) When the ink is formulated, no grinding means may be used. In order to make the light-storage material evenly distributed, a high-speed stirring method may be used.

(4) The relative density of the light-storage material is 3.6 to 4.1. The light-storage material can easily sink during preparation. By using an anti-settling agent (fumed silica), the shelf life of the light-storage ink can be increased.

(5) Do not use heavy metal compounds as additives.

3, the use of gloss ink should pay attention to the following matters:

(1) The viscosity of the prepared storage ink is between 300~500Pa. Around s, during printing, the viscosity of the ink should be adjusted with thinner to suit the printing process.

(2) When using screen printing inks for screen printing patterns or logos, polyester screens below 200 mesh should generally be selected. 80-120 mesh screen cloths can be used to obtain the best luminous effect.

(3) When using a light-storing ink, consider printing on a white substrate as much as possible. This can better improve the brightness and afterglow time of the printed pattern or logo.

(4) When the coating thickness of the printing and accumulating ink is controlled at 130 to 150 μm, the light emitting effect is the best. Therefore, this thickness can be achieved by using 80 mesh screen printing twice.

(5) When the substrate is a transparent object, the white ink should be printed before printing the light-storing ink, which can improve the light-emitting effect.

4, storage ink practical examples

Examples of application of light-storage light-emitting ink screen printing are as follows: The formula of light-storing light-emitting ink is (mass ratio): PVC ink (ss-777) 50 than light-storage material (PLO-7D) 50; printing method: use 100 mesh screen plate , printing on copperplate sticker paper twice, the afterglow luminance value after printing is as follows:

(to be continued)