JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS ,.. ! Facing page 50
TUBE-SQUEEZING PROPERTIES OF TOOTHPASTE oe0 51 • •o 0 5 i0 15 Squeeze number, n Figure 3. Toothpaste output, AG (g) froma 160 g-tube at 15 consecutive squeezes. Squeeze force 62 n. Squeeze time 0.5 s. •,, found value. C), calculated values from equation (12). Squeeze number Apphed force •o Y•eld value Shear stress ( r ) Figure 4. General appearance of the squeeze curve. Output from tube as a function of squeeze force. Squeeze time constant. Figure 5. Flow curve for a pseudo-plastic material.
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