File Name : s1a.tif Caption : fig. s1 response surface 2d contour plots showing effects of (a) guar gum and na-cmc on the flux. File Name : s1b.tif Caption : fig. s1 response surface 2d contour plots showing effects of (b) guar gum and glycerol on the flux. File Name : s1c.tif Caption : fig. s1 response surface 2d contour plots showing effects of (c ) na-cmc and glycerol on the flux.