We use "Gardner Holdt" Bubble type (with solvent soluble, then pour into a glass bulb. Viscosity measurements taken by a speed rush of bubbles in comparison with standard bulb bulb. sample)
We use "Gardner Holdt" The Bubble type (for example, by dissolving the solvent and pour into a glass tube. The viscosity measurement By the speed rush of bubbles in vitro compared to standard bulbs sample).