La méthode de pression du doigt et la méthode de soufflage avec boule de coton sont couramment utilisées pour évaluer le temps de séchage du revêtement ou de la surface liquide.. Leurs différences se reflètent principalement dans le principe de test et le mode de fonctionnement:

Méthode de pression des doigts:

La méthode de pression numérique consiste à évaluer le temps de séchage par revêtement sous pression du doigt ou par surface liquide., sentir s'il est encore collant ou adhésif. Lorsque le revêtement ou la surface liquide ne présente aucune viscosité ou sensation d'adhérence évidente, the surface can be considered to be dry. This method mainly relies on people’s sense of touch and experience, and belongs to subjective evaluation method.

La différence de temps de séchage entre la méthode de pression des doigts et la méthode de soufflage de boule de coton

Cotton ball blowing method:

The cotton ball blowing method is to use a blowing tool (such as a blowing pump) to blow air to the surface of the coating or liquid, and observe whether there is adhesion on the surface of the cotton ball to evaluate the drying time. When there is no more adhesion on the surface of the cotton ball, the surface can be considered dry. This method is more objective than the shiatsu method and relies on observation and judgment.

The difference between the two methods mainly lies in the difference of test principle and operation mode. The acupressure method is mainly based on touch and experience. It needs to judge the dryness of the surface through the feeling of the fingers. The rule of blowing cotton balls is more objective by observing the adhesion of the surface of cotton balls. Both of these methods are relatively simple and fast methods for assessing surface dryness, but they are not accurate measurements. They can only provide a general estimate of drying time, which is also affected by a variety of factors, such as coating type, température ambiante, humidité, etc.. For some applications that require high drying time, it may be necessary to use more accurate measurement methods and instruments for the evaluation of table drying time.