How much polysorbate 20 should I use to emulsify 4 liters of 10% gelatin?

I make carbon transfer prints and the tissue for capturing the image is a suspension of 10% 260 Bloom gelatin, 4% sugar, 6 mi Thymol, 10 gm Glycerol & 68 gm of India ink per 4000 ml of...

19 May 2016 7,952 0 View