Determination of the drying speed of paint "no dust"
Determination of the drying speed of paints "non-dusting" by the finger-test method "non-stick" drying speed Taizhou TS HARDWARE Co., Ltd , https://www.shuwengroup.com
The most common method for determining the drying speed of a "non-sticky" paint material is to test the dryness of the surface with the touch of a finger. It is tested once every 15 minutes by the finger touch conductivity test method, and then every half hour, and the degree of dryness of the paint film is determined by the main feeling. When the finger is gently pressed on the paint film without leaving a finger mark, the bar coater can consider that the surface of the paint film is not dusty. But the dust-free paint film will also show a serious "sticky" phenomenon, leaving a very clear trace when the finger is pressed over the paint film. (Related instruments: drying time point measuring instrument)
According to the dewdrop method, the method of measuring the "drying speed" of the "no dust" is determined by the finger touch.
DIN cup P style="WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(65,65,65); PADDING-BOTTOM: 0px; PADDING-TOP: 0px; FONT: 14px /25px 'Microsoft YaHei', ??????, Arial; PADDING-LEFT: 0px; MARGIN: 0px; WIDOWS: 1; LETTER-SPACING: normal; PADDING-RIGHT: 0px; TEXT-INDENT: 2em; -webkit -text-stroke-width: 0px">The simple method of determining the drying speed of "no dust" by CB Yakubovic and BC Stogov gives good results. This method is primarily suitable for determining the "no dust" drying rate of oil-based paints and varnishes. This method is based on the relationship between the condensation of water vapor (forming the dew point) and the hydrophilicity and susceptibility of the surface '6. If you take a breath on the dried paint film, an exposed fog vibrometer is left on the surface, and as a result, the surface of the paint becomes bird light (matte). The dew that was attached to the dry paint film quickly evaporated. If the paint film is not dry, dry or not completely "no dust", the paint film should not be left with an exposed atmosphere. If you take a breath on the paint film that has just begun during the “no-dust†drying process, the exposed atmosphere will only leave individual areas of the paint film where individual matt (dark light) spots appear. The film is further dried continuously, and the matte spots on the surface are continuously enlarged until the entire surface of the paint film becomes dull after a sigh of relief.
In order to determine the drying speed, a paint film is applied to the glass plate. Then, after 3 to 4 hours, suffocate for one second on the painted surface. Gold (the glass plate is placed about 10 cm from the mouth). If no matte spots appear on the painted surface at this time, this indicates that the paint film has not dried to the extent of "no dust". Test every half an hour to see when the matte spots appear. The appearance of individual matte spots on the surface of the paint film indicates that the "non-dusting" drying process is nearing the end, and from then on, the test begins once every 10 minutes. If the entire surface becomes dull after a sigh of relief, it can be considered that the paint film has been "no dust" dried.
According to the method of Yakubovic and Stogov, the drying speed of the paint material "non-stick dust" can be determined to an accuracy of several minutes.
For information on the paint film drying time measuring device, please refer to: http://://news.chinawj.com.cn Edit: (Hardware Business Network Information Center) http://news.chinawj.com.cn