This article presents a detailed introduction on the two testing methods- differential pressure method and equal pressure method; and gives some suggestions of the instrument selection and purchase. Continue reading
The article presents a detailed introduction to definition, application, difference and conversion of permeability testing indexes. Application is also provided. Continue reading
This article systematically introduces the development and testing principle of sensor method. Continue reading
This article outlines the packaging principle, preservative gas and application of Modified Atmosphere Packaging (MAP). It also presents detailed reasons why gases have different permeability on the same material. Continue reading
Oxygen permeability of contact lens, which has a direct influence on wearer amenity, is an important index of contact lens. This article deals with the importance, influencing factors and testing method of oxygen permeability of contact lens. Continue reading