Study Of Lubricating Coatings For Glass Containers With Optical Microscopy And Ftir Microscopy

Optical microscopy, transmission and reflection infrared spectroscopy, contact angle and weight loss on annealing are used to establish the thickness and homogeneity of the organic coatings used industrially to lubricate glass containers. As shown by a range of experiments and mathematical simulations, infrared spectroscopy is suitable to detect in situ the C-H bands of the hydrocarbon material near 2900 cm-1 and to quantify the organic coverage. Useful results are obtained using a FTIR spectrometer equipped either with a specular reflectance accessory or with an infrared microscope.