Abstract
The Drying process is very important in making aggregates orientation film by application of chromonic liquid crystals; Biebrich Scarlet Sodium Salt 6wt%(BSS6) and Sunset Yellow FCF 36wt%(SY36). The effect of drying process was investigated by using polarimetry. We measured the extinction distribution of the whole application film and distribution of drying time at each local point, and evaluated the correlation of extinction and drying time. In the case of BSS6, the extinction increases a little for the low value of drying time and keeps constant range between 0.05 and 0.2 when drying time is larger than 10 seconds. In the case of SY36, the extinction increases with increasing drying times by effect of crystallization. The extinction distribution on Drying film of BSS is uneven. We consider that this unevenness is not of degree of aggregates orientation but of film thickness. Because, the extinction distribution correlate strongly with distribution of intensity of transmitted light.
