Offering machine for printing quality testing of cosmetic packages. The routine testing items including ink layer abrasion resistance (anti-abrasion performance) and ink layer falling-off test as well as color.

>> Identification/viewing.

1. Abrasion Resistance Testing
Take Labthink RT-01 Rub Tester as an example. Specimen are prepared according to ASTM D 5264 and TAPPI T 830, and fastened on the testing platform of the rub tester. Then, put 80g clean offset paper on the load. Set the rubbing times (generally 40 rounds) and start testing. The printing quality is evaluated on the density change before and after the test. Generally, the result 70% and above are qualified conditions.

2. Ink Layer Decrement/Falling-off/Bond Strength Testing
For plastic printing, tests should be carried out according to GB7707. Labtink BLJ-02 Disk Stripping Tester and YGJ-02 Adhesive Roller are taken as the example. First, paste the scotch tape on the ink printing side. The specimen is rolled by the roller back and forth for three times of the YGJ-02 Adhesive Roller, and lays aside for 5min. Then, clamp the specimen on Plate A of BLJ-02 Disk Stripping Tester, the remained tape is fastened on Plate B. Start the tester, and Plate A turns around to separate the tap at a speed of 0.8m/s. Observe the falling-off status of the ink layer so as to judge printing ink layer bond strength.

3. Color Identification
People usually view and identify color in the daylight. The precise color identification requires that illuminant should assimilate with the frequency distribution of actual daylight, that is, CIE Standard Illuminant D65. However, in color matching, there is a special phenomenon: specimen is identical to the sample in one illuminant and appears differently in another. This phenomenon is called metamerism. Therefore, color assessment cabinet should be equipped with double light source. Lab think SGB-80 D65/A Standard Light Source is equipped with D64 and A light and resolve