Ink penetration drying test method

1, the principle of regular intervals at a certain time so that the ink on the newsprint and blank newsprint paper under a certain pressure friction, to blank newsprint is no longer due to friction dyeing, calculate the scraping time of the sample, and to indicate the drying of the ink This method is applicable to the determination of the dryness of printed ink, printed book ink, and written ink.

2. Tools and Materials (1) A square piece of glass with a mass of ≈0.15 g. The glass piece has a side length of 20 mm and a thickness of 2 mm. (2) 10g weight one. (3) The newsprint is cut into 15cm x 11cm. (4) Ink knife and squeegee. (5) Timekeeping clocks.

3, inspection methods (1) with a small amount of ink to be tested on the newsprint paper with a dip knife, with a squeegee knife from top to bottom force the ink scraped into a thin layer, scrape into a thin layer of ink about 4 ~ 5 cm, It is about 12 cm long (not shorter than 10 cm). (2) Record the time of good ink scraping. Place the scraping paper on a smooth glass plate (ink sample up) after 15 minutes. The top part is covered with another blank newsprint paper, and a square glass piece and a weight are pressed on the scraped end of the paper strip. (3) Quickly grasp the other end of the blank news note and move it along the direction of scratching to make the newsprint rub against the scratch under the pressure of the glass sheet and the weight. (4) Check if the newsprint paper is stained. If it is still dyed, repeat the above test at a different position with a new newsprint at a certain time afterwards until the newsprint is not dyed after the test. Then calculate the ink smear until the newsprint after the test. The time required for no dyeing is the drying time.